Activity for GEM in KEK Detector Technology Project MPGD group M. Sekimoto, T. Murakami, M. Tanaka, S. Tanaka, N. Ujiie, and K. Nakayoshi (KEK) T. Uchida

Activity for GEM in KEK Detector Technology ProjectMPGD group M. Sekimoto, T. Murakami, M. Tanaka, S. Tanaka, N. Ujiie, and K. Nakayoshi (KEK)T. Uchida (University of Tokyo )K. Kadomatsu and A. Sugiyama (Saga University )E. Nakano and S. Nakagawa (Osaka City University) Shoji Uno (KEK)KEK Detector Technology ProjectMarch 23rd , 2007

ContentsBasic study of GEMEffective gas gainCharge distributionThicker GEM : 100mmtRecovering for damaged GEMApplicationsNeutron counter

TestChamber2 mm10 mmGEM1GEM2GEM32 mm2 mm55Fe (5.9 keV X-ray)2200pF2200pFDRIFTTRANSFER 1TRANSFER 2INDUCTIONPCBGAS Ar-CH4(90/10) (P-10) Ar-CO2(70/30)15mm15mm3666PCB

Pulse shape

Readout System Belle-CDCPre-amp.Belle-CDCPre-amp. 7RPN220730 m5 mRPN220Discr.T0 timingFanin-FanoutGate Gen.Coincidence4ms delayWidth 40msCCNETGATEBUSYGate Gen.GATE120s delayVETOGate Gen.CAMAC ADC 2249A9GATEScalerCAMACTrg. GateGated trg.CLK Gen.MH1msFor beam testTiming InformationReset

Measurement of Effective Gas Gain

Effective gas gain vs VGEM

Gas gain vs various parametersP10Ar-CO2Ar-CO2Ar-CO2P10P10Ar-CO2EDEIETEI

VGEM=360VET=1.6kV/cmEI=3.6kV/cmElectric Field Dependence in Drift Region55Fe (5.9 keV X-ray)EDregionLow Field in Drift Region High Field in Drift RegionCollection efficiency deceases in higher electric field, since some electric field lines reach on the surface of GEM. Normalized Effective GainElectric Field in Drift Region (kV/cm)

Graph3

0.9582919563

0.9851042701

1.0003310162

1

1

1.0013240649

1.0006620324

0.9851042701

0.9476994373

0.8980470043

0.8497186362

0.808672625

Ar-CO2

(kV/cm)

Collection Efficiency

time

2-2-2-10

5-5-5-5-5-10

minitetimemeansigmapedemean-pede

09:40420.644100.4320.20.13741411621

109:5042039.3100.4319.60.12296620780.9981261711

2010:0041439.2100.4313.60.1250.9793878826

3010:10413.237100.4312.80.1182864450.9768894441

4010:20410.436.6100.43100.11806451610.9681449094

5010:30409.436.1100.43090.1168284790.9650218613

6010:40408.937.5100.4308.50.12155591570.9634603373

7010:5040837100.4307.60.12028608580.960649594

8011:00405.536.4100.4305.10.11930514590.9528419738

100.4-100.40

100.4-100.40

100.4-100.40

100.4-100.40

time

0

0

0

0

0

0

0

0

0

time2

0

0

0

0

0

0

0

0

0

0

ED (10-25)

2-2-2-10

5-5-5-5-5-10

GEM

minitetimemeansigmapedemean-pedeminitetimemeansigmapedemean-pede

09:40409.136.4100.4308.70.1179138322109:40497.248.8100.4396.80.122983871

109:50407.536.1100.4307.10.11755128620.9948169744109:50493.649.9100.4393.20.1269074262

2010:00404.537.4100.4304.10.12298585990.98509880142010:00522.952.1100.4422.50.1233136095

3010:10408.437.2100.43080.12077922080.99773242633010:10550.159.2100.4449.70.1316433178

4010:20408.535100.4308.10.11359948070.99805636544010:20525.253.6100.4424.80.1261770245

5010:30409.236.3100.4308.80.11755181351.00032393915010:30516.253.1100.4415.80.1277056277

6010:40406.937.3100.4306.50.12169657420.99287333986010:40514.852.1100.4414.40.1257239382

7010:5040737.9100.4306.60.12361382910.99319727897010:50522.254100.4421.80.1280227596

8011:00100.4-100.40-0.32523485588011:00100.4-100.40

100.4-100.40100.4-100.40

ED (10-25)

0

0

0

0

0

0

0

0

ED(10-25-2)

Ed(10/25)

2mm2mm2mmV2V110mm

vgemGEM1ET1(Kv/cm)TRANC1GEM2ET2(Kv/cm)TRANC2GEM3INDUCTIONEI(Kv/cm)SUMSUM/5B5*(SUM/5)K5+500ED(Kv/cm)meansigmapedemean-pede

0.07236051.8551.855103.6357252026200.1360.634.2100.4260.20.13143735590.8613042039

0.07236051.8551.855103.6357252028200.3389.934.6100.4289.50.11951640760.9582919563

0.07236051.8551.855103.6357252030200.539835.2100.4297.60.11827956990.9851042701

0.07236051.8551.855103.6357252032700.75402.633.7100.4302.20.11151555261.0003310162

0.07236051.8551.855103.6357252035201402.535.2100.4302.10.11651770941

0.07236051.8551.855103.6357252037701.25402.535.4100.4302.10.11717974181

0.07236051.8551.855103.6357252040201.5402.933.9100.4302.50.11206611571.0013240649

0.07236051.8551.855103.6357252042701.75402.733.2100.4302.30.10982467751.0006620324

0.07236051.8551.855103.635725204520239834100.4297.60.11424731180.9851042701

0.07236051.8551.855103.6357252047702.25386.732.6100.4286.30.11386657350.9476994373

0.07236051.8551.855103.6357252050202.5371.732.4100.4271.30.11942499080.8980470043

0.07236051.8551.855103.6357252052702.75357.130100.4256.70.11686793920.8497186362

0.07236051.8551.855103.6357252055203344.730.4100.4244.30.12443716740.808672625

ED(10-25-2)

0.966042966

0.9840609841

0.9844074844

0.9906444906

1

0.9993069993

0.9882189882

0.9445599446

0.8818433818

0.8118503119

Ar-CO2

P10

ED (kV/cm)

Collection Efficiency

ET(10-25)

0.69747899160.27034537510

0.88655462180.60381103610

0.93239113830.71853910280

0.96256684490.78642318380

0.98510313220.92060341410

0.995034377410

11.09805478360

0.97249809011.16911472810

0.93162719631.19888844780

0.88770053481.23263199680

0.84415584421.24255657010

0.79946524061.24652639940

0.76241405651.2544660580

1.3092497023

(kV/cm)

Relative gain

EI(10-25)

new

Ed(10/25)2mm2mm2mmV2V110mm


0.0735052.1652.165175.95448.8308031800.1311.227.7100.4210.80.13140417460.8576078112

0.0735052.1652.165175.95448.8308033800.3337.126.3100.4236.70.11111111110.9629780309

0.0735052.1652.165175.95448.8308035800.5342.226100.4241.80.10752688170.983726607

0.0735052.1652.165175.95448.8308038300.75344.426.5100.42440.10860655740.9926769731

0.0735052.1652.165175.95448.830804080135025.8100.4249.60.10336538461.0154597234

0.0735052.1652.165175.95448.8308043301.25346.226.3100.4245.80.1069975591

0.0735052.1652.165175.95448.8308045801.5345.525.7100.4245.10.10485516120.9971521562

0.0735052.1652.165175.95448.8308048301.75343.526100.4243.10.10695187170.9890154597

0.0735052.1652.165175.95448.8308050802339.125100.4238.70.10473397570.9711147274

0.0735052.1652.165175.95448.8308053302.25327.426100.42270.11453744490.9235150529

0.0735052.1652.165175.95448.8308055802.5316.725.1100.4216.30.11604253350.8799837266

0.0735052.1652.165175.95448.8308058302.75304.624.3100.4204.20.11900097940.8307567128

0.0735052.1652.165175.95448.8308060803295.923.4100.4195.50.11969309460.795362083

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

65000

0

EI(10-25)

0.86130420390

0.95829195630

0.98510427010

1.00033101620

10

10

1.00132406490

1.00066203240

0.98510427010

0.94769943730

0.89804700430

0.84971863620

0.8086726250

new

Et(10/25)

2mm2mm2mmV2V110mm


0.0735050.35150.3515103.5275.4189023900.5000

0.0735050.7250.725103.5295.8203025300.5000

0.0735051.05351.0535103.5316.2217026700.5000

0.0735051.4451.445103.5336.6231028100.5000

0.0735051.75551.7555103.5357245029500.5000

0.0735052.1652.165103.5377.4259030900.5000

0.0735052.45752.4575103.5397.8273032300.5000

0.0735052.8852.885103.5418.2287033700.5000

0.0735053.15953.1595103.5438.6301035100.5000

0.0735053.51053.5105103.5459315036500.5000

new

Ei(10/25)

2mm2mm2mmV2V110mm


0.0735052.1652.16510.35285.6196032601.3118.110.3100.417.70.5819209040.0739966555

0.0735052.1652.16531.05306210034001.3162.818.2100.462.40.29166666670.2608695652

0.0735052.1652.16551.75326.4224035401.3223.317.7100.4122.90.14401952810.5137959866

0.0735052.1652.16572.45346.8238036801.3266.620.6100.4166.20.12394705170.6948160535

0.0735052.1652.16593.15367.2252038201.328820.9100.4187.60.11140724950.7842809365

0.0735052.1652.165113.85387.6266039601.3309.623.7100.4209.20.11328871890.8745819398

0.0735052.1652.165134.55408280041001.332124.8100.4220.60.11242067090.9222408027

0.0735052.1652.165155.25428.4294042401.3335.825.9100.4235.40.11002548850.9841137124

0.0735052.1652.165175.95448.8308043801.3339.627.7100.4239.20.11580267561

0.0735052.1652.165196.65469.2322045201.3100.4-100.40-0.4197324415

0.0735052.1652.165217.35489.6336046601.3100.4-100.40-0.4197324415

0.0735052.1652.165238.055010350048001.3100.4-100.40-0.4197324415

0.0735052.1652.165258.755210.4364049401.3100.4-100.40-0.4197324415

0.0735052.1652.165279.455410.8378050801.3100.4-100.40-0.4197324415

0.0735052.1652.1652910.155611.2392052201.3100.4-100.40-0.4197324415

5

00.2254966887

00.5036423841

00.5993377483

00.6559602649

00.7678807947

00.8341059603

00.9158940397

00.9751655629

01

01.0281456954

01.0364238411

01.0397350993

01.0463576159

01.0920529801

VGEM=350VED=1.3kV/cmET=2.1kV/cmElectric Field Dependence in Induction RegionLow Field in Induction regionED=3000V/cmEI=4000V/cmHigh Field in Induction Region55Fe (5.9 keV X-ray)EIInductionRegionExtraction efficiency increases in higherelectric field, since most of field lines do notgo back on the surface of GEM.Additional gas amplification starts for rather high electric field in the induction region. Electric Field in Induction Region (kV/cm) Normalized Effective Gain

Graph1

0.2006245121

0.2708821233

0.5035128806

0.6783762685

0.7782982045

0.8602654176

0.9203747073

0.975019516

1

1.0281030445

1.0725995316

1.1155347385

1.1491022639

1.2365339578

1.4113973458

Ar-CO2

(kV/cm)

Extraction Efficiency

time

2-2-2-10

5-5-5-5-5-10


09:40420.644100.4320.20.13741411621

109:5042039.3100.4319.60.12296620780.9981261711

2010:0041439.2100.4313.60.1250.9793878826

3010:10413.237100.4312.80.1182864450.9768894441

4010:20410.436.6100.43100.11806451610.9681449094

5010:30409.436.1100.43090.1168284790.9650218613

6010:40408.937.5100.4308.50.12155591570.9634603373

7010:5040837100.4307.60.12028608580.960649594

8011:00405.536.4100.4305.10.11930514590.9528419738

100.4-100.40

100.4-100.40

100.4-100.40

100.4-100.40

time

320.2

319.6

313.6

312.8

310

309

308.5

307.6

305.1

time2

1

0.9981261711

0.9793878826

0.9768894441

0.9681449094

0.9650218613

0.9634603373

0.960649594

0.9528419738

0

ED(10-25)

2-2-2-10

5-5-5-5-5-10

GEM


09:40409.136.4100.4308.70.1179138322109:40497.248.8100.4396.80.122983871

109:50407.536.1100.4307.10.11755128620.9948169744109:50493.649.9100.4393.20.1269074262

2010:00404.537.4100.4304.10.12298585990.98509880142010:00522.952.1100.4422.50.1233136095

3010:10408.437.2100.43080.12077922080.99773242633010:10550.159.2100.4449.70.1316433178

4010:20408.535100.4308.10.11359948070.99805636544010:20525.253.6100.4424.80.1261770245

5010:30409.236.3100.4308.80.11755181351.00032393915010:30516.253.1100.4415.80.1277056277

6010:40406.937.3100.4306.50.12169657420.99287333986010:40514.852.1100.4414.40.1257239382

7010:5040737.9100.4306.60.12361382910.99319727897010:50522.254100.4421.80.1280227596

8011:00100.4-100.40-0.32523485588011:00100.4-100.40

100.4-100.40100.4-100.40

ED(10-25)

308.7

307.1

304.1

308

308.1

308.8

306.5

306.6

ED(10-26)

Ed(10/25)

2mm2mm2mmV2V110mm


0.07236051.8551.855103.6357252026200.1360.634.2100.4260.20.13143735590.8613042039

0.07236051.8551.855103.6357252028200.3389.934.6100.4289.50.11951640760.9582919563

0.07236051.8551.855103.6357252030200.539835.2100.4297.60.11827956990.9851042701

0.07236051.8551.855103.6357252032700.75402.633.7100.4302.20.11151555261.0003310162

0.07236051.8551.855103.6357252035201402.535.2100.4302.10.11651770941

0.07236051.8551.855103.6357252037701.25402.535.4100.4302.10.11717974181

0.07236051.8551.855103.6357252040201.5402.933.9100.4302.50.11206611571.0013240649

0.07236051.8551.855103.6357252042701.75402.733.2100.4302.30.10982467751.0006620324

0.07236051.8551.855103.635725204520239834100.4297.60.11424731180.9851042701

0.07236051.8551.855103.6357252047702.25386.732.6100.4286.30.11386657350.9476994373

0.07236051.8551.855103.6357252050202.5371.732.4100.4271.30.11942499080.8980470043

0.07236051.8551.855103.6357252052702.75357.130100.4256.70.11686793920.8497186362

0.07236051.8551.855103.6357252055203344.730.4100.4244.30.12443716740.808672625

ED(10-26)

0.8613042039

0.9582919563

0.9851042701

1.0003310162

1

1

1.0013240649

1.0006620324

0.9851042701

0.9476994373

0.8980470043

0.8497186362

0.808672625

ED(10-25-2)

0.70095969290.27034537510.8613042039

0.89097888680.60381103610.9582919563

0.93704414590.71853910280.9851042701

0.96737044150.78642318381.0003310162

0.99001919390.92060341411

111

1.00499040311.09805478361.0013240649

0.97735124761.16911472811.0006620324

0.93627639161.19888844780.9851042701

0.89213051821.23263199680.9476994373

0.84836852211.24255657010.8980470043

0.80345489441.24652639940.8497186362

0.766218811.2544660580.808672625

1.3092497023

(kV/cm)

Relative gain

ET(10-26)


vgemGEM1ET1(Kv/cm)TRANC1GEM2ET2(Kv/cm)TRANC2GEM3INDUCTIONEI(Kv/cm)SUMSUM/5B5*(SUM/5)K5+500ED(Kv/cm)meansigmapedemean-pedecurrent

0.0735052.1652.165175.95448.8308031800.1204.716.499.5105.20.155893536169.11.0130246020.8369132856

0.0735052.1652.165175.95448.8308033800.321816.599.5118.50.139240506369.11.0130246020.9427207637

0.0735052.1652.165175.95448.8308035800.522216.499.5122.50.13387755169.11.0130246020.9745425617

0.0735052.1652.165175.95448.8308038300.7522316.899.5123.50.136032388769.11.0130246020.9824980111

0.0735052.1652.165175.95448.8308040801223.117.399.5123.60.139967637569.11.0130246020.9832935561

0.0735052.1652.165175.95448.8308043301.25225.216.199.5125.70.128082736769.11.0130246021

0.0735052.1652.165175.95448.8308045801.5224.816.899.5125.30.134078212369.11.0130246020.9968178202

0.0735052.1652.165175.95448.8308048301.75224.717.199.5125.20.136581469669.11.0130246020.9960222753

0.0735052.1652.165175.95448.8308050802224.416.699.5124.90.132906325169.11.0130246020.9936356404

0.0735052.1652.165175.95448.8308053302.25223.21799.5123.70.137429264369.11.0130246020.984089101

0.0735052.1652.165175.95448.8308055802.5218.217.299.5118.70.144903117169.11.0130246020.9443118536

0.0735052.1652.165175.95448.8308058302.75215.115.699.5115.60.134948096969.11.0130246020.9196499602

0.0735052.1652.165175.95448.8308060803208.626.299.5109.10.240146654469.11.0130246020.8679395386

0.0735052.1652.165175.95448.8308063303.25205.115.499.5105.60.145833333369.11.0130246020.8400954654

0.0735052.1652.165175.95448.8308065803.5201.615.899.5102.10.154750244969.11.0130246020.8122513922

0.0735052.1652.165175.95448.8308068303.7519715.499.597.50.157948717969.11.0130246020.7756563246

0.0735052.1652.165175.95448.830807080499.5-99.5069.11.013024602-0.7915672235

0.0735052.1652.165175.95448.8308073304.2599.5-99.5069.11.013024602-0.7915672235

06000099.5-99.5069.10-0.7915672235

0099.5-99.5069.10-0.7915672235

0069.10

69.1

69.1

ET(10-26)

0.83691328560.8576078112

0.94272076370.9629780309

0.97454256170.983726607

0.98249801110.9926769731

0.98329355611.0154597234

11

0.99681782020.9971521562

0.99602227530.9890154597

0.99363564040.9711147274

0.9840891010.9235150529

0.94431185360.8799837266

0.91964996020.8307567128

0.86793953860.795362083

0.8400954654

0.8122513922

0.7756563246

ET2(10-26)

new



0.0735052.1652.165175.95448.8308031800.1311.227.7100.4210.80.13140417460.8576078112

0.0735052.1652.165175.95448.8308033800.3337.126.3100.4236.70.11111111110.9629780309

0.0735052.1652.165175.95448.8308035800.5342.226100.4241.80.10752688170.983726607

0.0735052.1652.165175.95448.8308038300.75344.426.5100.42440.10860655740.9926769731

0.0735052.1652.165175.95448.830804080135025.8100.4249.60.10336538461.0154597234

0.0735052.1652.165175.95448.8308043301.25346.226.3100.4245.80.1069975591

0.0735052.1652.165175.95448.8308045801.5345.525.7100.4245.10.10485516120.9971521562

0.0735052.1652.165175.95448.8308048301.75343.526100.4243.10.10695187170.9890154597

0.0735052.1652.165175.95448.8308050802339.125100.4238.70.10473397570.9711147274

0.0735052.1652.165175.95448.8308053302.25327.426100.42270.11453744490.9235150529

0.0735052.1652.165175.95448.8308055802.5316.725.1100.4216.30.11604253350.8799837266

0.0735052.1652.165175.95448.8308058302.75304.624.3100.4204.20.11900097940.8307567128

0.0735052.1652.165175.95448.8308060803295.923.4100.4195.50.11969309460.795362083

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

65000

0

ET2(10-26)

0.86130420390.8576078112

0.95829195630.9629780309

0.98510427010.983726607

1.00033101620.9926769731

11.0154597234

11

1.00132406490.9971521562

1.00066203240.9890154597

0.98510427010.9711147274

0.94769943730.9235150529

0.89804700430.8799837266

0.84971863620.8307567128

0.8086726250.795362083

ET1(10-26)

new

Et(10/26)

2mm2mm2mmV2V110mm

vgemGEM1ET1(Kv/cm)TRANC1GEM2ET2(Kv/cm)TRANC2GEM3INDUCTIONEI(Kv/cm)SUMSUM/5B5*(SUM/5)K5+500ED(Kv/cm)meansigmapedemean-pede0current

0.0735050.35150.3515175.95346.8238036801.399.5-99.50-0.622653316669.11.013024602

0.0735050.7250.725175.95367.2252038201.31187.599.518.50.40540540540.115769712169.10.000447034

0.0735051.05351.0535175.95387.6266039601.3133.910.299.534.40.29651162790.215269086469.10.0004893362

0.0735051.4451.445175.95408280041001.3161.310.699.561.80.17152103560.386733416869.10.000569341

0.0735051.75551.7555175.95428.4294042401.3194.413.999.594.90.14646996840.593867334269.10.0006635175

0.0735052.1652.165175.95448.8308043801.3231.716.899.5132.20.12708018150.827284105169.10.0007655506

0.0735052.45752.4575175.95469.2322045201.325218.899.5152.50.12327868850.954317897469.10.0008068338

0.0735052.8852.885175.95489.6336046601.3259.320.299.5159.80.12640801169.10.0008052645

0.0735053.15953.1595175.955010350048001.3259.318.999.5159.80.1182728411169.10.0007817776

0.0735053.51053.5105175.955210.4364049401.3258.220.599.5158.70.12917454320.993116395569.10.0007563995

0.0735053.851153.85115175.955410.8378050801.3259.220.399.5159.70.9993742178

0.0735054.21254.2125175.955611.2392052201.399.5-99.5-0.6226533166

350501301351705310.60000

014014

000

17

ET1(10-26)

0.1157697121

0.2152690864

0.3867334168

0.5938673342

0.8272841051

0.9543178974

1

1

0.9931163955

0.9993742178

EDEI

ET1

Et(10/26)

2mm2mm2mmV2V110mm


0.0735052.1650.3515175.95397.8273040301.3124.98.599.525.40.33464566930.18662747980.034829816269.11.013024602

0.0735052.1650.725175.95408280041001.3147.59.299.5480.19166666670.35268185160.124384488469.11.013024602

0.0735052.1651.0535175.95418.2287041701.3168.311.399.568.80.1642441860.50551065390.255541021269.11.013024602

0.0735052.1651.445175.95428.4294042401.3190.81499.591.30.15334063530.67083027190.450013253669.11.013024602

0.0735052.1651.7555175.95438.6301043101.3212.715.599.5113.20.13692579510.83174136660.69179370169.11.013024602

0.0735052.1652.165175.95448.8308043801.3235.617.399.5136.10.12711241731169.11.013024602

0.0735052.1652.4575175.95459315044501.3244.418.199.5144.90.12491373361.06465833951.133497379869.11.013024602

0.0735052.1652.885175.95469.2322045201.3245.217.199.5145.70.11736444751.07053637031.146048120269.11.013024602

0.0735052.1653.1595175.95479.4329045901.324518.799.5145.50.12852233681.06906686261.142903956769.11.013024602

0.0735052.1653.5105175.95489.6336046601.3245.318.799.5145.80.12825788751.07127112421.147621821569.11.013024602

0.0735052.1653.85115175.95499.8343047301.3244.71999.5145.20.13085399451.0668626011.138195809569.11.013024602

0.0735052.1654.2125175.955010350048001.399.5-99.50-0.73108008820.534478095369.11.013024602

EDEI

0.18662747980.11576971210.0348298162

0.35268185160.21526908640.1243844884

0.50551065390.38673341680.2555410212

0.67083027190.59386733420.4500132536

0.83174136660.82728410510.691793701

10.95431789741

1.064658339511.1334973798

1.070536370311.1460481202

1.06906686260.99311639551.1429039567

1.07127112420.99937421781.1476218215

1.0668626011.1381958095

EI(10-26)

E2

Et(10/26)

2mm2mm2mmV2V110mm


0.0735050.35152.165175.95397.8273040301.31259.199.525.50.35686274510.18736223370.035104606669.11.013024602

0.0735050.7252.165175.95408280041001.3148.99.699.549.40.19433198380.36296840560.131746063569.10.0005255727

0.0735051.05352.165175.95418.2287041701.3171.811.399.572.30.15629322270.53122703890.282202166969.10.0005962235

0.0735051.4452.165175.95428.4294042401.3192.713.699.593.20.14592274680.68479059520.468938159269.10.0006577151

0.0735051.75552.165175.95438.6301043101.3215.115.499.5115.60.13321799310.84937545920.721438670769.10.0007222459

0.0735052.1652.165175.95448.8308043801.3236.416.899.5136.90.12271731191.00587803091.01179061369.10.0007810796

0.0735052.45752.165175.95459315044501.3246.818.799.5147.30.1269517991.0822924321.171356908469.10.0008026147

0.0735052.8852.165175.95469.2322045201.3247.718.599.5148.20.1248313091.08890521681.185714571169.10.0007930664

0.0735053.15952.165175.95479.4329045901.3246.918.599.5147.40.12550881951.08302718591.172947885469.10.0007784493

0.0735053.51052.165175.95489.6336046601.3249.219.299.5149.70.1282565131.09992652461.209838359569.10.0007738986

0.0735053.851152.165175.95499.8343047301.324618.499.5146.50.12559726961.07641440121.158667963169.10.0007526549

0.0735054.21252.165175.955010350048001.399.5-99.50-0.73108008820.534478095369.10

0

0

EI(10-26)

0.18662747980.11576971210.03482981620.18736223370.0351046066

0.35268185160.21526908640.12438448840.36296840560.1317460635

0.50551065390.38673341680.25554102120.53122703890.2822021669

0.67083027190.59386733420.45001325360.68479059520.4689381592

0.83174136660.82728410510.6917937010.84937545920.7214386707

10.954317897411.00587803091.011790613

1.064658339511.13349737981.0822924321.1713569084

1.070536370311.14604812021.08890521681.1857145711

1.06906686260.99311639551.14290395671.08302718591.1729478854

1.07127112420.99937421781.14762182151.09992652461.2098383595

1.0668626011.13819580951.07641440121.1586679631

EI(10-25)

EI(Kv/cm)ED(Kv/cm)

0.70.20062451210.10.8369132856

1.050.27088212330.30.9427207637

1.750.50351288060.50.9745425617

2.450.67837626850.750.9824980111

3.150.778298204510.9832935561

3.850.86026541761.251

4.550.92037470731.50.9968178202

5.250.9750195161.750.9960222753

5.95120.9936356404

6.651.02810304452.250.984089101

7.351.07259953162.50.9443118536

8.051.11553473852.750.9196499602

8.751.149102263930.8679395386

9.451.23653395783.250.8400954654

10.151.41139734583.50.8122513922

3.750.7756563246

EI(10-25)

0.20062451210.8369132856

0.27088212330.9427207637

0.50351288060.9745425617

0.67837626850.9824980111

0.77829820450.9832935561

0.86026541761

0.92037470730.9968178202

0.9750195160.9960222753

10.9936356404

1.02810304450.984089101

1.07259953160.9443118536

1.11553473850.9196499602

1.14910226390.8679395386

1.23653395780.8400954654

1.41139734580.8122513922

0.7756563246

VGEM

Ei(10/26)

2mm2mm2mmV2V110mm


0.0735052.1652.16520.7295.8203033301.3125.28.699.525.70.334630350269.11.0130246020.2006245121

0.0735052.1652.16531.05306210034001.3134.211.299.534.70.322766570669.11.0130246020.2708821233

0.0735052.1652.16551.75326.4224035401.316413.599.564.50.209302325669.11.0130246020.5035128806

0.0735052.1652.16572.45346.8238036801.3186.413.199.586.90.150747986269.11.0130246020.6783762685

0.0735052.1652.16593.15367.2252038201.3199.213.899.599.70.138415245769.11.0130246020.7782982045

0.0735052.1652.165113.85387.6266039601.3209.715.799.5110.20.142468239669.11.0130246020.8602654176

0.0735052.1652.165134.55408280041001.3217.416.999.5117.90.143341815169.11.0130246020.9203747073

0.0735052.1652.165155.25428.4294042401.3224.417.399.5124.90.138510808669.11.0130246020.975019516

0.0735052.1652.165175.95448.8308043801.3227.617.499.5128.10.135831381769.11.0130246021

0.0735052.1652.165196.65469.2322045201.3231.218.599.5131.70.140470766969.11.0130246021.0281030445

0.0735052.1652.165217.35489.6336046601.3236.917.799.5137.40.128820960769.11.0130246021.0725995316

0.0735052.1652.165238.055010350048001.3242.417.999.5142.90.125262421369.11.0130246021.1155347385

0.0735052.1652.165258.755210.4364049401.3246.71999.5147.20.12907608769.11.0130246021.1491022639

0.0735052.1652.165279.455410.8378050801.3257.921.299.5158.40.133838383869.11.0130246021.2365339578

0.0735052.1652.1652910.155611.2392052201.3280.323.799.5180.80.131084070869.11.0130246021.4113973458

69.100

50

VGEM

00.07399665550.2254966887

00.26086956520.5036423841

00.51379598660.5993377483

00.69481605350.6559602649

00.78428093650.7678807947

00.87458193980.8341059603

00.92224080270.9158940397

00.98411371240.9751655629

011

01.0281456954

01.0364238411

01.0397350993

01.0463576159

01.0920529801

0

00.2127437326

00.3443593315

00.5480501393

00.6256963788

00.7127437326

00.866643454

01

01.0887883008

01.204735376

01.3234679666

01.4568245125

01.7064763231

02.1302228412

0

0

Ar-CO2

P10

EI (kV/cm)

Extraction Efficiency

new

Ei(10/25)

2mm2mm2mmV2V110mm


0.0735052.1652.16510.35285.6196032601.3118.110.3100.417.70.58192090469.11.0130246020.0739966555

0.0735052.1652.16531.05306210034001.3162.818.2100.462.40.291666666700.2608695652

0.0735052.1652.16551.75326.4224035401.3223.317.7100.4122.90.144019528100.5137959866

0.0735052.1652.16572.45346.8238036801.3266.620.6100.4166.20.123947051700.6948160535

0.0735052.1652.16593.15367.2252038201.328820.9100.4187.60.111407249500.7842809365

0.0735052.1652.165113.85387.6266039601.3309.623.7100.4209.20.113288718900.8745819398

0.0735052.1652.165134.55408280041001.332124.8100.4220.60.112420670900.9222408027

0.0735052.1652.165155.25428.4294042401.3335.825.9100.4235.40.110025488500.9841137124

0.0735052.1652.165175.95448.8308043801.3339.627.7100.4239.20.115802675601

0.0735052.1652.165196.65469.2322045201.3100.4-100.400-0.4197324415

0.0735052.1652.165217.35489.6336046601.3100.4-100.400-0.4197324415

0.0735052.1652.165238.055010350048001.3100.4-100.400-0.4197324415

0.0735052.1652.165258.755210.4364049401.3100.4-100.400-0.4197324415

0.0735052.1652.165279.455410.8378050801.3100.4-100.400-0.4197324415

0.0735052.1652.1652910.155611.2392052201.3100.4-100.400-0.4197324415

0

50

0

0

0

00.2254966887

00.5036423841

00.5993377483

00.6559602649

00.7678807947

00.8341059603

00.9158940397

00.9751655629

01

01.0281456954

01.0364238411

01.0397350993

01.0463576159

01.0920529801

CO2Vgem

2mm2mm2mm10mm


0.0630052.4852.485175.1489.6288041801.3099.5-99.50-0.6145768993

0.06231052.48852.4885175.27489.6297642761.3112.56.399.5130.48461538460.080296479361.21.0130718954

0.06432052.56852.5685175.44489.6307243721.3119.7899.520.20.3960396040.124768375563.21.0126582278

0.06633052.64852.6485175.61489.6316844681.3138.89.599.539.30.24173027990.242742433665.11.0138248848

0.06834052.72852.7285175.78489.6326445641.3178.812.299.579.30.15384615380.489808523867.11.0134128167

0.0735052.8852.885175.95489.6336046601.3261.420.199.5161.90.1241507103169.11.013024602

0.07236052.88852.8885176.12489.6345647561.342837.299.5328.50.11324200912.029030265671.11.0126582278

0.07437052.96852.9685176.29489.6355248521.3265.421.999.5663.60.03300180834.0988264361731.0136986301

0.07638053.04853.0485176.46489.6364849481.3450.842.199.51405.20.0299601488.679431748751.0133333333

0.07839053.12853.1285176.63489.6374450441.3328.532.299.536640.008788209622.6312538604771.012987013

0.0840053.2853.285176.8489.6384051401.399.5-15920-9.833230389180.40.9950248756

0.08241053.28853.2885176.97489.6393652361.399.5-1592-9.83323038910

0

76970.1

0

0

0

0

0

0

0

0

0

Electric Field Dependence in Transfer Region55Fe (5.9 keV X-ray)ETETTransfer RegionTransfer RegionEff(ET){Eff(ED)Eff(EI)}Transfer region plays as a extraction of upper GEM and also as a collection of lower GEM.Therefore, the electric field dependence can be represented based on the drift field dependence and the induction field dependence.Normalized Effective GainElectric Field in Transfer Region (kV/cm)

Graph4

0.11824953690.1399394856

0.17739040780.2602118003

0.31360.467473525

0.49386678720.7178517398

0.69999779911

0.90359871661.1535552194

1.08812947471.208774584

1.17247950031.208774584

1.24168499721.2004538578

1.20865855291.2080181543

1.22661352

1.2382891372

1.2074635423

V/cm)

Sheet8

2-2-2-10

5-5-5-5-5-10


09:40420.644100.4320.20.13741411621

109:5042039.3100.4319.60.12296620780.9981261711

2010:0041439.2100.4313.60.1250.9793878826

3010:10413.237100.4312.80.1182864450.9768894441

4010:20410.436.6100.43100.11806451610.9681449094

5010:30409.436.1100.43090.1168284790.9650218613

6010:40408.937.5100.4308.50.12155591570.9634603373

7010:5040837100.4307.60.12028608580.960649594

8011:00405.536.4100.4305.10.11930514590.9528419738

100.4-100.40

100.4-100.40

100.4-100.40

100.4-100.40

Sheet8

0

0

0

0

0

0

0

0

0

Sheet9

0

0

0

0

0

0

0

0

0

0

Sheet3

2-2-2-10

5-5-5-5-5-10

GEM


09:40409.136.4100.4308.70.1179138322109:40497.248.8100.4396.80.122983871

109:50407.536.1100.4307.10.11755128620.9948169744109:50493.649.9100.4393.20.1269074262

2010:00404.537.4100.4304.10.12298585990.98509880142010:00522.952.1100.4422.50.1233136095

3010:10408.437.2100.43080.12077922080.99773242633010:10550.159.2100.4449.70.1316433178

4010:20408.535100.4308.10.11359948070.99805636544010:20525.253.6100.4424.80.1261770245

5010:30409.236.3100.4308.80.11755181351.00032393915010:30516.253.1100.4415.80.1277056277

6010:40406.937.3100.4306.50.12169657420.99287333986010:40514.852.1100.4414.40.1257239382

7010:5040737.9100.4306.60.12361382910.99319727897010:50522.254100.4421.80.1280227596

8011:00100.4-100.40-0.32523485588011:00100.4-100.40

100.4-100.40100.4-100.40

Sheet3

0

0

0

0

0

0

0

0

Sheet10

Ed(10/25)

2mm2mm2mmV2V110mm


0.07236051.8551.855103.6357252026200.1360.634.2100.4260.20.13143735590.8613042039

0.07236051.8551.855103.6357252028200.3389.934.6100.4289.50.11951640760.9582919563

0.07236051.8551.855103.6357252030200.539835.2100.4297.60.11827956990.9851042701

0.07236051.8551.855103.6357252032700.75402.633.7100.4302.20.11151555261.0003310162

0.07236051.8551.855103.6357252035201402.535.2100.4302.10.11651770941

0.07236051.8551.855103.6357252037701.25402.535.4100.4302.10.11717974181

0.07236051.8551.855103.6357252040201.5402.933.9100.4302.50.11206611571.0013240649

0.07236051.8551.855103.6357252042701.75402.733.2100.4302.30.10982467751.0006620324

0.07236051.8551.855103.635725204520239834100.4297.60.11424731180.9851042701

0.07236051.8551.855103.6357252047702.25386.732.6100.4286.30.11386657350.9476994373

0.07236051.8551.855103.6357252050202.5371.732.4100.4271.30.11942499080.8980470043

0.07236051.8551.855103.6357252052702.75357.130100.4256.70.11686793920.8497186362

0.07236051.8551.855103.6357252055203344.730.4100.4244.30.12443716740.808672625

Sheet10

0

0

0

0

0

0

0

0

0

0

0

0

0

Sheet6

0.70095969290.27034537510

0.89097888680.60381103610

0.93704414590.71853910280

0.96737044150.78642318380

0.99001919390.92060341410

110

1.00499040311.09805478360

0.97735124761.16911472810

0.93627639161.19888844780

0.89213051821.23263199680

0.84836852211.24255657010

0.80345489441.24652639940

0.766218811.2544660580

1.3092497023

(kV/cm)

Relative gain

Sheet1



0.0735052.1652.165175.95448.8308031800.1204.716.499.5105.20.155893536169.11.0130246020.8369132856

0.0735052.1652.165175.95448.8308033800.321816.599.5118.50.139240506369.11.0130246020.9427207637

0.0735052.1652.165175.95448.8308035800.522216.499.5122.50.13387755169.11.0130246020.9745425617

0.0735052.1652.165175.95448.8308038300.7522316.899.5123.50.136032388769.11.0130246020.9824980111

0.0735052.1652.165175.95448.8308040801223.117.399.5123.60.139967637569.11.0130246020.9832935561

0.0735052.1652.165175.95448.8308043301.25225.216.199.5125.70.128082736769.11.0130246021

0.0735052.1652.165175.95448.8308045801.5224.816.899.5125.30.134078212369.11.0130246020.9968178202

0.0735052.1652.165175.95448.8308048301.75224.717.199.5125.20.136581469669.11.0130246020.9960222753

0.0735052.1652.165175.95448.8308050802224.416.699.5124.90.132906325169.11.0130246020.9936356404

0.0735052.1652.165175.95448.8308053302.25223.21799.5123.70.137429264369.11.0130246020.984089101

0.0735052.1652.165175.95448.8308055802.5218.217.299.5118.70.144903117169.11.0130246020.9443118536

0.0735052.1652.165175.95448.8308058302.75215.115.699.5115.60.134948096969.11.0130246020.9196499602

0.0735052.1652.165175.95448.8308060803208.626.299.5109.10.240146654469.11.0130246020.8679395386

0.0735052.1652.165175.95448.8308063303.25205.115.499.5105.60.145833333369.11.0130246020.8400954654

0.0735052.1652.165175.95448.8308065803.5201.615.899.5102.10.154750244969.11.0130246020.8122513922

0.0735052.1652.165175.95448.8308068303.7519715.499.597.50.157948717969.11.0130246020.7756563246

0.0735052.1652.165175.95448.830807080499.5-99.5069.11.013024602-0.7915672235

0.0735052.1652.165175.95448.8308073304.2599.5-99.5069.11.013024602-0.7915672235

06000099.5-99.5069.10-0.7915672235

0099.5-99.5069.10-0.7915672235

0069.10

69.1

69.1

Sheet1

00.85760781120.7009596929

00.96297803090.8909788868

00.9837266070.9370441459

00.99267697310.9673704415

01.01545972340.9900191939

011

00.99715215621.0049904031

00.98901545970.9773512476

00.97111472740.9362763916

00.92351505290.8921305182

00.87998372660.8483685221

00.83075671280.8034548944

00.7953620830.76621881

0

0

0

Sheet13

new



0.0735052.1652.165175.95448.8308031800.1311.227.7100.4210.80.13140417460.8576078112

0.0735052.1652.165175.95448.8308033800.3337.126.3100.4236.70.11111111110.9629780309

0.0735052.1652.165175.95448.8308035800.5342.226100.4241.80.10752688170.983726607

0.0735052.1652.165175.95448.8308038300.75344.426.5100.42440.10860655740.9926769731

0.0735052.1652.165175.95448.830804080135025.8100.4249.60.10336538461.0154597234

0.0735052.1652.165175.95448.8308043301.25346.226.3100.4245.80.1069975591

0.0735052.1652.165175.95448.8308045801.5345.525.7100.4245.10.10485516120.9971521562

0.0735052.1652.165175.95448.8308048301.75343.526100.4243.10.10695187170.9890154597

0.0735052.1652.165175.95448.8308050802339.125100.4238.70.10473397570.9711147274

0.0735052.1652.165175.95448.8308053302.25327.426100.42270.11453744490.9235150529

0.0735052.1652.165175.95448.8308055802.5316.725.1100.4216.30.11604253350.8799837266

0.0735052.1652.165175.95448.8308058302.75304.624.3100.4204.20.11900097940.8307567128

0.0735052.1652.165175.95448.8308060803295.923.4100.4195.50.11969309460.795362083

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

0.0735052.1652.165175.95448.8308058302.75100.4-100.40

65000

0

Sheet13

0.86130420390

0.95829195630

0.98510427010

1.00033101620

10

10

1.00132406490

1.00066203240

0.98510427010

0.94769943730

0.89804700430

0.84971863620

0.8086726250

Sheet12

new

Et(10/26)

2mm2mm2mmV2V110mm


0.0735050.35150.3515175.95346.8238036801.399.5-99.50-0.752647503869.11.013024602

0.0735050.7250.725175.95367.2252038201.31187.599.518.50.40540540540.139939485669.10.000447034

0.0735051.05351.0535175.95387.6266039601.3133.910.299.534.40.29651162790.260211800369.10.0004893362

0.0735051.4451.445175.95408280041001.3161.310.699.561.80.17152103560.46747352569.10.000569341

0.0735051.75551.7555175.95428.4294042401.3194.413.999.594.90.14646996840.717851739869.10.0006635175

0.0735052.1652.165175.95448.8308043801.3231.716.899.5132.20.1270801815169.10.0007655506

0.0735052.45752.4575175.95469.2322045201.325218.899.5152.50.12327868851.153555219469.10.0008068338

0.0735052.8852.885175.95489.6336046601.3259.320.299.5159.80.126408011.20877458469.10.0008052645

0.0735053.15953.1595175.955010350048001.3259.318.999.5159.80.11827284111.20877458469.10.0007817776

0.0735053.51053.5105175.955210.4364049401.3258.220.599.5158.70.12917454321.200453857869.10.0007563995

0.0735053.851153.85115175.955410.8378050801.3259.220.399.5159.71.2080181543

0.0735054.21254.2125175.955611.2392052201.399.5-99.5-0.7526475038

350501301351705310.60000

014014

000

17

Sheet12

0

0

0

0

0

0

0

0

0

0

Sheet15

ET1

Et(10/26)

2mm2mm2mmV2V110mm


0.0735052.1650.3515175.95397.8273040301.3124.98.599.525.40.33464566930.18662747980.034829816269.11.013024602

0.0735052.1650.725175.95408280041001.3147.59.299.5480.19166666670.35268185160.124384488469.11.013024602

0.0735052.1651.0535175.95418.2287041701.3168.311.399.568.80.1642441860.50551065390.255541021269.11.013024602

0.0735052.1651.445175.95428.4294042401.3190.81499.591.30.15334063530.67083027190.450013253669.11.013024602

0.0735052.1651.7555175.95438.6301043101.3212.715.599.5113.20.13692579510.83174136660.69179370169.11.013024602

0.0735052.1652.165175.95448.8308043801.3235.617.399.5136.10.12711241731169.11.013024602

0.0735052.1652.4575175.95459315044501.3244.418.199.5144.90.12491373361.06465833951.133497379869.11.013024602

0.0735052.1652.885175.95469.2322045201.3245.217.199.5145.70.11736444751.07053637031.146048120269.11.013024602

0.0735052.1653.1595175.95479.4329045901.324518.799.5145.50.12852233681.06906686261.142903956769.11.013024602

0.0735052.1653.5105175.95489.6336046601.3245.318.799.5145.80.12825788751.07127112421.147621821569.11.013024602

0.0735052.1653.85115175.95499.8343047301.3244.71999.5145.20.13085399451.0668626011.138195809569.11.013024602

0.0735052.1654.2125175.955010350048001.399.5-99.50-0.73108008820.534478095369.11.013024602

Sheet15

00.13993948560

00.26021180030

00.4674735250

00.71785173980

010

01.15355521940

01.2087745840

01.2087745840

01.20045385780

01.20801815430

00

Sheet4

E2

Et(10/26)

2mm2mm2mmV2V110mm


0.0735050.35152.165175.95397.8273040301.31259.199.525.50.35686274510.18736223370.035104606669.11.013024602

0.0735050.7252.165175.95408280041001.3148.99.699.549.40.19433198380.36296840560.131746063569.10.0005255727

0.0735051.05352.165175.95418.2287041701.3171.811.399.572.30.15629322270.53122703890.282202166969.10.0005962235

0.0735051.4452.165175.95428.4294042401.3192.713.699.593.20.14592274680.68479059520.468938159269.10.0006577151

0.0735051.75552.165175.95438.6301043101.3215.115.499.5115.60.13321799310.84937545920.721438670769.10.0007222459

0.0735052.1652.165175.95448.8308043801.3236.416.899.5136.90.12271731191.00587803091.01179061369.10.0007810796

0.0735052.45752.165175.95459315044501.3246.818.799.5147.30.1269517991.0822924321.171356908469.10.0008026147

0.0735052.8852.165175.95469.2322045201.3247.718.599.5148.20.1248313091.08890521681.185714571169.10.0007930664

0.0735053.15952.165175.95479.4329045901.3246.918.599.5147.40.12550881951.08302718591.172947885469.10.0007784493

0.0735053.51052.165175.95489.6336046601.3249.219.299.5149.70.1282565131.09992652461.209838359569.10.0007738986

0.0735053.851152.165175.95499.8343047301.324618.499.5146.50.12559726961.07641440121.158667963169.10.0007526549

0.0735054.21252.165175.955010350048001.399.5-99.50-0.73108008820.534478095369.10

0

0

Sheet4

0.139939485600

0.260211800300

0.46747352500

0.717851739800

100

1.153555219400

1.20877458400

1.20877458400

1.200453857800

1.208018154300

00

Sheet14

0.350.18662747980.18736223370.0349669415

0.70.35268185160.36296840560.1280123693

1.050.50551065390.53122703890.2685409278

1.40.67083027190.68479059520.4593782611

1.750.83174136660.84937545920.7064607052

2.111.00587803091.0058780309

2.451.06465833951.0822924321.1522716635

2.81.07053637031.08890521681.1657126384

3.151.06906686261.08302718591.1578284757

3.51.07127112421.09992652461.1783195245

3.851.0668626011.07641440121.1483862678

Sheet14

00.1399394856

00.2602118003

00.467473525

00.7178517398

01

01.1535552194

01.208774584

01.208774584

01.2004538578

01.2080181543

0

Sheet11

2mm2mm2mmV2V110mm


0.0630051.5551.555103357210026000.5000

0.06231051.55551.5555103.1357217026700.5000

0.06432051.6551.655103.2357224027400.5000

0.06633051.65551.6555103.3357231028100.5000

0.06834051.7551.755103.4357238028800.5000

0.0735051.75551.7555103.5357245029500.5000

0.07236051.8551.855103.6357252030200.5000

0.07437051.85551.8555103.7357259030900.5000

0.07638051.9551.955103.8357266031600.5000

0.07236051.8551.855103.6357252030200.5000

Sheet2

EI(Kv/cm)ED(Kv/cm)

0.70.20062451210.10.8369132856-0.03922919

1.050.27088212330.30.94272076370.03925241

1.750.50351288060.50.97454256170.11395625

2.450.67837626850.750.98249801110.20209414060.210.20632458230.04256983330.34387430390.1182495369

3.150.778298204510.98329355610.28450.2570.25270644390.06386054680.42117740650.1773904078

3.850.86026541761.2510.36128164060.3360.3360.1128960.560.3136

4.550.92037470731.50.99681782020.432556250.4230.42165393790.17779204340.70275656320.4938667872

5.250.9750195161.750.99602227530.49845039060.5040.50199522670.25199920770.83665871120.6999977991

5.95120.99363564040.55910.5740.57034685760.3252955380.9505780960.9035987166

6.651.02810304452.250.9840891010.61465039060.6360.62588066830.39172661091.04313444711.0881294747

7.351.07259953162.50.94431185360.665256250.6880.64968655530.42209262011.08281092551.1724795003

8.051.11553473852.750.91964996020.71108164060.7270.66858552110.4470065991.11430920181.2416849972

8.751.149102263930.86793953860.75230.760.65963404930.4351170791.09939008221.2086585529

9.451.23653395783.250.84009546540.78909414060.7910.66451551310.44158086721.10752585521.22661352

10.151.41139734583.50.81225139220.821656250.8220.66767064440.44578408941.11278440731.2382891372

3.750.77565632460.850.65930787590.43468687521.09884645981.2074635423

Sheet2

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

0

Sheet5

000.1399394856

000.2602118003

000.467473525

000.7178517398

001

001.1535552194

001.208774584

001.208774584

001.2004538578

001.2080181543

00

00

00

Sheet7

000.1399394856

000.2602118003

000.467473525

000.7178517398

001

001.1535552194

001.208774584

001.208774584

001.2004538578

001.2080181543

00

00

00

Ei(10/26)

2mm2mm2mmV2V110mm


0.0735052.1652.16520.7295.8203033301.3125.28.699.525.70.334630350269.11.0130246020.2006245121

0.0735052.1652.16531.05306210034001.3134.211.299.534.70.322766570669.11.0130246020.2708821233

0.0735052.1652.16551.75326.4224035401.316413.599.564.50.209302325669.11.0130246020.5035128806

0.0735052.1652.16572.45346.8238036801.3186.413.199.586.90.150747986269.11.0130246020.6783762685

0.0735052.1652.16593.15367.2252038201.3199.213.899.599.70.138415245769.11.0130246020.7782982045

0.0735052.1652.165113.85387.6266039601.3209.715.799.5110.20.142468239669.11.0130246020.8602654176

0.0735052.1652.165134.55408280041001.3217.416.999.5117.90.143341815169.11.0130246020.9203747073

0.0735052.1652.165155.25428.4294042401.3224.417.399.5124.90.138510808669.11.0130246020.975019516

0.0735052.1652.165175.95448.8308043801.3227.617.499.5128.10.135831381769.11.0130246021

0.0735052.1652.165196.65469.2322045201.3231.218.599.5131.70.140470766969.11.0130246021.0281030445

0.0735052.1652.165217.35489.6336046601.3236.917.799.5137.40.128820960769.11.0130246021.0725995316

0.0735052.1652.165238.055010350048001.3242.417.999.5142.90.125262421369.11.0130246021.1155347385

0.0735052.1652.165258.755210.4364049401.3246.71999.5147.20.12907608769.11.0130246021.1491022639

0.0735052.1652.165279.455410.8378050801.3257.921.299.5158.40.133838383869.11.0130246021.2365339578

0.0735052.1652.1652910.155611.2392052201.3280.323.799.5180.80.131084070869.11.0130246021.4113973458

69.100

50

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

new

Ei(10/25)

2mm2mm2mmV2V110mm


0.0735052.1652.16510.35285.6196032601.3118.110.3100.417.70.58192090469.11.0130246020.0739966555

0.0735052.1652.16531.05306210034001.3162.818.2100.462.40.291666666700.2608695652

0.0735052.1652.16551.75326.4224035401.3223.317.7100.4122.90.144019528100.5137959866

0.0735052.1652.16572.45346.8238036801.3266.620.6100.4166.20.123947051700.6948160535

0.0735052.1652.16593.15367.2252038201.328820.9100.4187.60.111407249500.7842809365

0.0735052.1652.165113.85387.6266039601.3309.623.7100.4209.20.113288718900.8745819398

0.0735052.1652.165134.55408280041001.332124.8100.4220.60.112420670900.9222408027

0.0735052.1652.165155.25428.4294042401.3335.825.9100.4235.40.110025488500.9841137124

0.0735052.1652.165175.95448.8308043801.3339.627.7100.4239.20.115802675601

0.0735052.1652.165196.65469.2322045201.3100.4-100.400-0.4197324415

0.0735052.1652.165217.35489.6336046601.3100.4-100.400-0.4197324415

0.0735052.1652.165238.055010350048001.3100.4-100.400-0.4197324415

0.0735052.1652.165258.755210.4364049401.3100.4-100.400-0.4197324415

0.0735052.1652.165279.455410.8378050801.3100.4-100.400-0.4197324415

0.0735052.1652.1652910.155611.2392052201.3100.4-100.400-0.4197324415

0

50

0

0

0

00.2254966887

00.5036423841

00.5993377483

00.6559602649

00.7678807947

00.8341059603

00.9158940397

00.9751655629

01

01.0281456954

01.0364238411

01.0397350993

01.0463576159

01.0920529801

Ei(10/19)

2mm2mm0.5mmV2V110mm3.21.92


0.036360101.810101.8101010.72515.1183623360.5000000

0.036360101.810101.8101021.44525.2187223720.5000000

0.036360101.810101.8101032.16535.3190824080.5000000

0.036360101.810101.8101042.88545.4194424440.5000000

0.036360101.810101.8101053.6555.5198024800.5000000

0.036360101.810101.8101064.32565.6201625160.5000000

0.036360101.810101.8101075.04575.7205225520.5000000

0.036360101.810101.8101085.76585.8208825880.5000000

0.036360101.810101.8101096.48595.9212426240.5000000

0.036360101.810101.81010107.2606216026600.5000000

0.036360101.810101.81010117.92616.1219626960.5000000

0.036360101.810101.81010128.64626.2223227320.5000000

0.036360101.810101.81010139.36636.3226827680.5000000

0.036360101.810101.810101410.08646.4230428040.5000000

0.036360101.810101.810101510.8656.5234028400.5000000

0.036360101.810101.810101611.52666.6237628760.5000000

CO2Vgem

2mm2mm2mm10mm


0.0630052.4852.485175.1489.6288041801.3099.5-99.50-0.6145768993

0.06231052.48852.4885175.27489.6297642761.3112.56.399.5130.48461538460.080296479361.21.0130718954

0.06432052.56852.5685175.44489.6307243721.3119.7899.520.20.3960396040.124768375563.21.0126582278

0.06633052.64852.6485175.61489.6316844681.3138.89.599.539.30.24173027990.242742433665.11.0138248848

0.06834052.72852.7285175.78489.6326445641.3178.812.299.579.30.15384615380.489808523867.11.0134128167

0.0735052.8852.885175.95489.6336046601.3261.420.199.5161.90.1241507103169.11.013024602

0.07236052.88852.8885176.12489.6345647561.342837.299.5328.50.11324200912.029030265671.11.0126582278

0.07437052.96852.9685176.29489.6355248521.3265.421.999.5663.60.03300180834.0988264361731.0136986301

0.07638053.04853.0485176.46489.6364849481.3450.842.199.51405.20.0299601488.679431748751.0133333333

0.07839053.12853.1285176.63489.6374450441.3328.532.299.536640.008788209622.6312538604771.012987013

0.0840053.2853.285176.8489.6384051401.399.5-15920-9.833230389180.40.9950248756

0.08241053.28853.2885176.97489.6393652361.399.5-1592-9.83323038910

0

76970.1

0

0

0

0

0

0

0

0

0

Measurement ofCharge Distributionon the readout board

Readout stripReadout stripStrip pitch 200 mmwidth 100 mmgap 100 mm length : 50mm Number of strips = 64

Zoom up view100mm100mm200mm

OneEventDisplay

VGEM370VEd= 0.5 kV/cmEt=2.59kV/cmEi=5.18 kV/cms = 181.2 0.3 mmAr-CO2(70/30)Charge distribution -1 0 1Triple GEM gD, gT1, gT2, gI=1.5, 1, 1, 1mmdXeach stripCOG)-1 0 1

Measurement resultss for a gauss fit in a charge distributionUnit : mmTotal gap : gD/2 + (gT1+ gT2 ) + gI

P10Ar-CO2s2 (mm2)

Figure

0.2134440.0424360.23360.0313

0.1656490.0313290.18860.0291875

0.1135690.0416160.121320.0186075

0.1466890.0299290.148360.0253675

0.0240250.121320.0186075

0.087680.0133175

P10

Ar-CO2(70/30)

Magboltz(P10)

MagBoltz(Ar-CO2)

Total depth(cm)

2(mm2)

Charge spread

Sheet1

Total gapP10Ar-CO2drift-region(cm)tranc-region(cm)indaction-region(cm)

gD=4mm0.70.4650.2162250.20.40.10.4830.1770.23360.0313

gD=1.5mm0.5750.4150.2070.1722250.0428490.0750.40.10.4340.1710.18860.0291875

gT=1mm0.3750.3430.1810.1176490.0327610.0750.20.10.3480.1360.121320.0186075

gI=2mm0.4750.390.2040.15210.0416160.0750.20.20.3850.1590.148360.0253675

Douuble GEM0.3730.3550.1730.1260250.0299290.0750.20.10.3480.1360.121320.0186075

gI=1mm0.2750.1570.0246490.0750.10.10.2960.1150.087680.0133175

0.60.580.52

0.130.230.26

0.660.610.3680.3580.6066300355606.6300355241

0.990.620.3650.3620.6041522987604.1522986797

1.650.580.360.3480.6600

1.980.560.3590.3420.5991660872599.1660871578

2.970.520.350.3290.5916079783591.60797831

1.110.150.1790.1120.15693151370.423083916

1.480.20.170.1270.16771255170.4123105626

2.590.230.1810.1360.17523555580.4254409477

2.960.250.1850.1430.1806308390.4301162634

3.330.260.1850.1470.18343254890.4301162634

Sheet1

00

00

00

00

0

Data

00

00

00

00

00

Ar-CO2

Total gapP10Ar-CO2drift-region(cm)tranc-region(cm)indaction-region(cm)

gD=4mm0.70.4620.2134440.20.40.10.4830.1770.23360.0313

gD=1.5mm0.5750.4070.2060.1656490.0424360.0750.40.10.4340.1710.18860.0291875

gT=1mm0.3750.3370.1770.1135690.0313290.0750.20.10.3480.1360.121320.0186075

gI=2mm0.4750.3830.2040.1466890.0416160.0750.20.20.3850.1590.148360.0253675

Douuble GEM0.3750.1730.0299290.0750.20.10.3480.1360.121320.0186075

gI=1mm0.2750.1550.0240250.0750.10.10.2960.1150.087680.0133175

0.60.580.52

0.130.230.26

0.660.610.3610.358

0.990.620.3590.362

1.650.580.3570.348

1.980.560.3550.342

2.970.520.3430.329

1.110.150.1790.1120.1569315137

1.480.20.1680.1270.1677125517

2.590.230.1780.1360.1752355558

2.960.250.1830.1430.180630839

3.330.260.1820.1470.1834325489

Ar-CO2

726.561818.265

501.298638.325

321.919572.93

274.346578.347

232.611576.314

195.448587.919

174.257595.21

150.877599.021

132.773600.501

130.04609.476

142.485613.57

221.532565.66

253.038517.918

257.041495.294

238.636348.812

Ar-CO2

P10

Elecric field(V/cm)

P10

Ar-CO2

10726.561

20501.298

50321.919

70274.346

100232.611

150195.448

200174.257

300150.877

500132.773

700130.04

1000142.485

2000221.532

3000253.038

4000257.041

10000238.636

P10

10818.265

20638.325

50572.93

70578.347

100576.314

150587.919

200595.21

300599.021

500600.501

700609.476

11000613.57

22000565.66

3000517.918

4000495.294

10000348.812

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

MagBoltzvs.Measurement DataP10Ar-CO2Electric field in transfer region (kV/cm)

Graph2

0.1630.10920522880.3650.3626908942

0.1660.1173562610.3640.3575337561

0.1810.13878687260.360.3511215555

0.1850.14365605450.3570.3406918795

0.1850.14443619350.3490.3334388771

/cm)

2(mm2)

Figure

0.2134440.0424360.23360.0313

0.1656490.0313290.18860.0291875

0.1135690.0416160.121320.0186075

0.1466890.0299290.148360.0253675

0.0240250.121320.0186075

0.087680.0133175

P10

Ar-CO2(70/30)

Magboltz(P10)

MagBoltz(Ar-CO2)

Total depth(cm)

Signa*Sigma(mm2)

Charge spread

Vgem=370

Total gapP10Ar-CO2drift-region(cm)tranc-region(cm)indaction-region(cm)P10Ar-CO2Ar-CO2

gD=4mm0.70.4650.2162250.20.40.10.4830.1840.23360.0339487

gD=1.5mm0.5750.4150.2070.1722250.0428490.0750.40.10.4340.1780.18860.031737575

gT=1mm0.3750.3430.1810.1176490.0327610.0750.20.10.3480.1400.121320.019732575

gI=2mm0.4750.390.2040.15210.0416160.0750.20.20.3850.1620.148360.026133475

Douuble GEM0.3730.340.1730.11560.0299290.0750.20.10.3480.1400.121320.019732575

gI=1mm0.2750.1570.0246490.0750.10.10.2960.1170.087680.013730075

P100.5(kV/cm)1.65(kV/cm)3.3(kV/cm)

0.60.580.52

0.1330.2450.253

Ar-CO20.5(kV/cm)2.59(kV/cm)5.18(kV/cm)

0.660.610.3680.3580.6066300355606.6300355241

0.990.620.3650.3620.6041522987604.1522986797

1.650.580.360.3480.6600

1.980.560.3590.3420.5991660872599.1660871578

2.970.520.350.3290.5916079783591.60797831

1.110.1510.1790.1110.15616585730.423083916

1.480.1830.170.1200.1628661260.4123105626

2.590.2450.1810.1400.17841685740.4254409477

2.960.2530.1850.1430.18063602910.4301162634

3.330.2560.1850.1440.18147940650.4301162634

MagMag

Vgem=370

00

00

00

00

0

em

Sheet2

00

00

00

00

00

Vgem=380

0000

0000

0000

0000

0000

Data

0.0428490.2162250.03394870.2336

0.0327610.1722250.0317375750.1886

0.0416160.1176490.0197325750.12132

0.0299290.15210.0261334750.14836

0.0246490.11560.0197325750.12132

0.0137300750.08768

Ar-CO2

P10

Total gapP10Ar-CO2drift-region(cm)tranc-region(cm)indaction-region(cm)P10Ar-CO2Ar-CO2

gD=4mm0.70.4650.2162250.20.40.10.4830.1840.2336784660.033917844

gD=1.5mm0.5750.4150.2070.1722250.0428490.0750.40.10.4340.1780.18860343480.031713364

gT=1mm0.3750.3430.1810.1176490.0327610.0750.20.10.3480.1400.12132343480.019708364

gI=2mm0.4750.390.2040.15210.0416160.0750.20.20.3850.1620.14832185080.02608904

Douuble GEM0.3730.340.1730.11560.0299290.0750.20.10.3480.1400.12132343480.019708364

gI=1mm0.2750.1570.0246490.0750.10.10.2960.1170.08768343480.013705864

P100.5(kV/cm)1.65(kV/cm)3.35(kV/cm)

0.60050.580.5196

0.13280.2450.2526

P10Ar-CO20.5(kV/cm)2.59(kV/cm)5.18(kV/cm)

Mag-datadataMag-

0.670.62250.3650.3630.6041522987604.1522986797

1.010.60740.3640.3580.6033241252603.3241251599

1.680.58840.360.3510.6600

2.010.55690.3570.3410.5974947699597.4947698516

3.020.53450.3490.3330.5907622195590.7622195097

Ar-CO2

Mag-datadataMag-

1.040.14530.1630.1090.15500252260.4037325848

1.380.17420.1660.1170.16084928350.4074309757

2.420.24040.1810.1390.17709261980.4254409477

3.110.25430.1850.1440.18093386080.4301162634

3.450.25650.1850.1440.18155388730.4301162634

P10

00

00

00

00

0

00

00

00

00

00

0000

0000

0000

0000

0000

0000

0000

0000

0000

0000

00

Total gapP10Ar-CO2drift-region(cm)tranc-region(cm)indaction-region(cm)magbolz-datmagbolz-dat

gD=4mm0.70.4620.2134440.20.40.10.4830.1770.23360.0313

gD=1.5mm0.5750.4070.2060.1656490.0424360.0750.40.10.4340.1710.18860.0291875

gT=1mm0.3750.3370.1770.1135690.0313290.0750.20.10.3480.1360.121320.0186075

gI=2mm0.4750.3830.2040.1466890.0416160.0750.20.20.3850.1590.148360.0253675

Douuble GEM0.3750.1730.0299290.0750.20.10.3480.1360.121320.0186075

gI=1mm0.2750.1550.0240250.0750.10.10.2960.1150.087680.0133175

P100.60.580.52

Ar-CO20.130.230.26

0.660.610.3610.358

0.990.620.3590.362

1.650.580.3570.348

1.980.560.3550.342

2.970.520.3430.329

1.110.150.1790.1120.1569315137

1.480.1830.1680.1210.1637843094

2.590.2450.1780.1420.1792554044

2.960.2520.1830.1440.1811858162

3.330.2560.1820.1450.1823038672

726.561818.265

501.298638.325

321.919572.93

274.346578.347

232.611576.314

195.448587.919

174.257595.21

150.877599.021

132.773600.501

130.04609.476

142.485613.57

221.532565.66

253.038517.918

257.041495.294

238.636348.812

Ar-CO2

P10

Elecric field(V/cm)

Ar-CO2

10726.561

20501.298

50321.919

70274.346

100232.611

150195.448

200174.257

300150.877

500132.773

700130.04

1000142.485

2000221.532

3000253.038

4000257.041

10000238.636

P10

10818.265

20638.325

50572.93

70578.347

100576.314

150587.919

200595.21

300599.021

500600.501

700609.476

11000613.57

22000565.66

3000517.918

4000495.294

10000348.812

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

100mm GEM

Single GEM-100mm Test Chamber 100mm-GEM1Drift Plate2ED=0.75kv/cmEI=7kv/cm2Drift AriaEDInduction Aria EIGASAr-CO2(70/30)2200pF2200pFRead outRead out55Fe (5.9 keV X-ray)PCB15mm15mm3666PCB

Single GEM Ed=1.5kv/cmEi=6.0kv/cm

Graph3

146.9721950.6044444444

250.81777777781039.36

370.8133333333565.6933333333

608.0977777778307.6577777778

995.1511111111172.3244444444

1673.6222222222109.1688888889

2897.9377777778

4433.52

90

70

Vgem[V]

Gain

Sheet1

90Edmean

0.189.259.70.9004524887

0.393.664.10.9668174962

0.595.666.10.9969834087

0.795.866.31

0.996.5671.0105580694

1.197.968.41.0316742081

1.399.169.61.0497737557

1.59969.51.04826546

1.79969.51.04826546

1.9100.270.71.0663650075

2.199.469.91.0542986425

2.3100.270.71.0663650075

2.5101.371.81.0829562594

2.7101.371.81.0829562594

2.910272.51.0935143288

3.110373.51.1085972851

3.310474.51.1236802413

3.510575.51.1387631976

70Edmean

0.25202.7176.20.9427501338

0.5213.4186.91

0.75215.9189.41.013376137

1213.9187.41.0026752274

1.25211.3184.80.9887640449

1.5208.1181.60.9716425896

1.75204.2177.70.9507758159

2197170.50.9122525415

2.25186.2159.70.8544676297

2.5177.2150.70.8063135367

2.75168.4141.90.7592295345

3162.2135.70.7260567148

3.25154.9128.40.6869983949

3.5150.1123.60.6613162119

Sheet1

00

00

00

00

00

00

00

00

00

00

00

00

00

00

0

0

0

0

90

70

Ed[kV/cm]

Relative Gain

Sheet2

90Eimeanmean-pe

2.459.930.40.4713178295

2.8565.235.70.5534883721

3.370.240.70.6310077519

3.7575.646.10.7147286822

4.281.852.30.8108527132

4.6585.455.90.8666666667

5.188.659.10.9162790698

5.5591.5620.9612403101

69464.51

6.4593.964.40.9984496124

6.995.766.21.0263565891

7.3597.668.11.0558139535

7.89969.51.0775193798

8.25101.471.91.1147286822

8.7105.876.31.1829457364

9.15107.5781.2093023256

70Eimeanmean-pe

174.447.90.2597613883

2135.9109.40.5932754881

3166.2139.70.7575921909

4184.8158.30.8584598698

5203.6177.10.9604121475

6210.9184.41

7218.1191.61.0390455531

8219192.51.0439262473

9234.52081.1279826464

Sheet2

00

00

00

00

00

00

00

00

00

0

0

0

0

0

0

0

90

70

Ei[kV/cm]

Relative Gain

Sheet3

90Vgemmeangain

60045.7916.29146.972

62057.327.8250.8177777778

64070.641.1370.8133333333

66096.967.4608.0977777778

680139.8110.3995.1511111111

700215185.51673.6222222222

720350.7321.22897.9377777778

740520.9491.44433.52

70Vgemmeangain

660242.7216.21950.6044444444

640141.7115.21039.36

62089.262.7565.6933333333

60060.634.1307.6577777778

58045.619.1172.3244444444

56038.612.1109.1688888889

Sheet3

00

00

00

00

00

00

0

0

90

70

Vgem[V]

Gain

ED dependence90f V.S. 70fVgem=660VEi=6.0kv/cm

Graph1

0.90045248870.9427501338

0.96681749621

0.99698340871.013376137

11.0026752274

1.01055806940.9887640449

1.03167420810.9716425896

1.04977375570.9507758159

1.048265460.9122525415

1.048265460.8544676297

1.06636500750.8063135367

1.05429864250.7592295345

1.06636500750.7260567148

1.08295625940.6869983949

1.08295625940.6613162119

1.0935143288

1.1085972851

1.1236802413

1.1387631976

90

70

Ed[kV/cm]

Relative Gain

Sheet1

90Edmean

0.189.259.70.9004524887

0.393.664.10.9668174962

0.595.666.10.9969834087

0.795.866.31

0.996.5671.0105580694

1.197.968.41.0316742081

1.399.169.61.0497737557

1.59969.51.04826546

1.79969.51.04826546

1.9100.270.71.0663650075

2.199.469.91.0542986425

2.3100.270.71.0663650075

2.5101.371.81.0829562594

2.7101.371.81.0829562594

2.910272.51.0935143288

3.110373.51.1085972851

3.310474.51.1236802413

3.510575.51.1387631976

70Edmean

0.25202.7176.20.9427501338

0.5213.4186.91

0.75215.9189.41.013376137

1213.9187.41.0026752274

1.25211.3184.80.9887640449

1.5208.1181.60.9716425896

1.75204.2177.70.9507758159

2197170.50.9122525415

2.25186.2159.70.8544676297

2.5177.2150.70.8063135367

2.75168.4141.90.7592295345

3162.2135.70.7260567148

3.25154.9128.40.6869983949

3.5150.1123.60.6613162119

Sheet1

00

00

00

00

00

00

00

00

00

00

00

00

00

00

0

0

0

0

90

70

Ed[kV/cm]

Relative Gain

Sheet2

90Eimeanmean-pe

2.459.930.40.4713178295

2.8565.235.70.5534883721

3.370.240.70.6310077519

3.7575.646.10.7147286822

4.281.852.30.8108527132

4.6585.455.90.8666666667

5.188.659.10.9162790698

5.5591.5620.9612403101

69464.51

6.4593.964.40.9984496124

6.995.766.21.0263565891

7.3597.668.11.0558139535

7.89969.51.0775193798

8.25101.471.91.1147286822

8.7105.876.31.1829457364

9.15107.5781.2093023256

70Eimeanmean-pe

174.447.90.2597613883

2135.9109.40.5932754881

3166.2139.70.7575921909

4184.8158.30.8584598698

5203.6177.10.9604121475

6210.9184.41

7218.1191.61.0390455531

8219192.51.0439262473

9234.52081.1279826464

Sheet2

00

00

00

00

00

00

00

00

00

0

0

0

0

0

0

0

90

70

Sheet3

90Vgemmeangain

60045.7916.29146.972

62057.327.8250.8177777778

64070.641.1370.8133333333

66096.967.4608.0977777778

680139.8110.3995.1511111111

700215185.51673.6222222222

720350.7321.22897.9377777778

740520.9491.44433.52

70Vgemmeangain

660242.7216.21950.6044444444

640141.7115.21039.36

62089.262.7565.6933333333

60060.634.1307.6577777778

58045.619.1172.3244444444

56038.612.1109.1688888889

Sheet3

00

00

00

00

00

00

0

0

90

70

Recovering for damaged GEM

RecoveringWe try to recover the damaged GEM.Soft etchingChemical etchingPlasma etchingDead GEMThere are damaged spots.Zoom

As a result of recoveringSoft etchingEtching time is shorter than usual chemical etching.Plasma etchingAn etching effect is stronger than chemical etching.Damaged GEMs, which can not be recovered by soft etching , are reprocessed by Plasma etching.

Recovery of GEM is basically possible.About 90% of Damaged GEMs can be recovered by Soft or Plasma etching .

Applications-Neutron Counter-

Detection of Thermal Neutron No need of expensive He Gas No need of pressure vesselFree readout pattern High resolutionPosition and TimeInsensitive against g-rayCapability against high counting rateGEM1-BGEM2-BGEM3-CuAr-CO2 gas2 mm1 mm1 mm1 mmReadout boarda8 foils for real test chamber

Signal Shape and Pulse Height DistributionThreshold for Neutron measurementThreshold for g-ray measurement ADC counts

Graph2

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Co-60

Neutron

ADC

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061128-Co-06dB-foil

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Documents

Activity for GEM in KEK Detector Technology Project MPGD group M. Sekimoto, T. Murakami, M. Tanaka, S. Tanaka, N. Ujiie, and K. Nakayoshi (KEK) T. Uchida