P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 11

Beam Line & Target StatusBeam Line & Target Status

Topics to be Addressed:Topics to be Addressed:

• Results of Beam Line Commissioning Phase 1 2004Results of Beam Line Commissioning Phase 1 2004

• Implications & Tests for Phase 2 in 2005Implications & Tests for Phase 2 in 2005 • New Components StatusNew Components Status

(i) Separator(i) Separator(ii) Beam Transport Solenoid BTS(ii) Beam Transport Solenoid BTS(iii) Vacuum System (beam line + BTS)(iii) Vacuum System (beam line + BTS)(iii) Cryogenic Transfer Lines LN(iii) Cryogenic Transfer Lines LN22 LHe LHe

(iv) He-Bag/Target (v. brief)(iv) He-Bag/Target (v. brief)

• Schedule 2005Schedule 2005

• Summary + Critical PointsSummary + Critical Points

Topics to be Addressed:Topics to be Addressed:

• Results of Beam Line Commissioning Phase 1 2004Results of Beam Line Commissioning Phase 1 2004

• Implications & Tests for Phase 2 in 2005Implications & Tests for Phase 2 in 2005 • New Components StatusNew Components Status

(i) Separator(i) Separator(ii) Beam Transport Solenoid BTS(ii) Beam Transport Solenoid BTS(iii) Vacuum System (beam line + BTS)(iii) Vacuum System (beam line + BTS)(iii) Cryogenic Transfer Lines LN(iii) Cryogenic Transfer Lines LN22 LHe LHe

(iv) He-Bag/Target (v. brief)(iv) He-Bag/Target (v. brief)

• Schedule 2005Schedule 2005

• Summary + Critical PointsSummary + Critical Points

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 22

Beam Line Commissioning 2004 Phase 1 Beam Line Commissioning 2004 Phase 1 Beam Line Commissioning 2004 Phase 1 Beam Line Commissioning 2004 Phase 1

Phase 1: June – August 2004 Phase 1: June – August 2004 Reason for Reason for MoreMore beam tuning: beam tuning: • new Triplet I QSBs new Triplet I QSBs (before QSMs LEMS)(before QSMs LEMS)- optical + physical properties different- optical + physical properties different

• old Separator old Separator (equivalent to new Separator)(equivalent to new Separator) – electrostatic + physical properties similar, – electrostatic + physical properties similar, magnetic properties differentmagnetic properties different

• new Triplet II QSKs new Triplet II QSKs - optical + physical properties different- optical + physical properties different

• optics Triplet I optics Triplet I BTS non-trivial BTS non-trivial dispersion, double-waist, vertically paralleldispersion, double-waist, vertically parallel

• finalize optics up to injection BTS finalize optics up to injection BTS try to reduce divergence & try to reduce divergence & hence influence on beam-spot size in COBRA hence influence on beam-spot size in COBRA

SepSepSepSep

Trip ITrip ITrip ITrip I Trip IITrip IITrip IITrip II

ASCASCASCASC

BTSBTSBTSBTS

COBRACOBRACOBRACOBRA

XXXX

YYYY

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 33

Beam Line Commissioning Results Phase ABeam Line Commissioning Results Phase ABeam Line Commissioning Results Phase ABeam Line Commissioning Results Phase A

Triplet 2Triplet 2

11

SolenoidSolenoidWIENWIEN

FilterFilter

ColliColli..TripTrip..µµ++

ee++ee++µµ++

Integrated Integrated μμ++ Rate Rate4cm Tg.E @ 1.8m4cm Tg.E @ 1.8mAARRµµ~1.26·10~1.26·1088 µ µ++/s/s

(2.3·10(2.3·1088 µ+/s 6cm Tg.) µ+/s 6cm Tg.)

Integrated Integrated μμ++ Rate Rate4cm Tg.E @ 1.8m4cm Tg.E @ 1.8mAARRµµ~1.26·10~1.26·1088 µ µ++/s/s

(2.3·10(2.3·1088 µ+/s 6cm Tg.) µ+/s 6cm Tg.)

Momentum-Momentum-Spectrum: Spectrum: Data:Data: whole Beam Line optimized for whole Beam Line optimized for each data point + 2-D Scan for each data point + 2-D Scan for each point !!!each point !!!Theory:Theory: -Kinematic Edge (29.79 -Kinematic Edge (29.79 MeV/c)MeV/c)Theoretical func. PTheoretical func. P3.53.5 folded folded with Gaussian with Gaussian ΔΔP/P + Const. P/P + Const. Cloud Cloud µµ++ contribution contribution Fitted Fitted to data to data

Integrated Integrated ee++ Rate Rate4cm Tg.E @ 1.8m4cm Tg.E @ 1.8mAA

RRee~7.7·10~7.7·1088 e e++/s/see++//μμ++ ~ 6.1~ 6.1

Integrated Integrated ee++ Rate Rate4cm Tg.E @ 1.8m4cm Tg.E @ 1.8mAA

RRee~7.7·10~7.7·1088 e e++/s/see++//μμ++ ~ 6.1~ 6.1

2/dof = 0.94Pcent = (28.16 0.02) MeV/cP/P = (7.7 0.3) % FWHM

Pbeam = (28.2 0.9) MeV/c

2/dof = 0.94Pcent = (28.16 0.02) MeV/cP/P = (7.7 0.3) % FWHM

Pbeam = (28.2 0.9) MeV/c

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 44

Beam Line Commissioning Results Phase A –cont. Beam Line Commissioning Results Phase A –cont. Beam Line Commissioning Results Phase A –cont. Beam Line Commissioning Results Phase A –cont.

FirstFirst -- Beam Studies with MEG Beam: Beam Studies with MEG Beam:

for calibration purposes in the experiment for calibration purposes in the experiment

--pp→→00n, n, --pp→→nn

55 55 → 83 MeV → 83 MeV s and 129 MeV s and 129 MeV ss

Data taken from:Data taken from:

• P-spectrum measurements 25-33 MeV/cP-spectrum measurements 25-33 MeV/c

s detected above 30 MeV/c (pulse-ht. + RF tof)s detected above 30 MeV/c (pulse-ht. + RF tof)• dedicated dedicated -- runs at 56 MeV/c & 103 MeV/c runs at 56 MeV/c & 103 MeV/c 56 MeV/c interesting since max. momentum 56 MeV/c interesting since max. momentum that can be transported to COBRA with that can be transported to COBRA with good optics SNM in BTSgood optics SNM in BTS• dedicated CEX run at 112 MeV/cdedicated CEX run at 112 MeV/c

FirstFirst -- Beam Studies with MEG Beam: Beam Studies with MEG Beam:

for calibration purposes in the experiment for calibration purposes in the experiment

--pp→→00n, n, --pp→→nn

55 55 → 83 MeV → 83 MeV s and 129 MeV s and 129 MeV ss

Data taken from:Data taken from:

• P-spectrum measurements 25-33 MeV/cP-spectrum measurements 25-33 MeV/c

s detected above 30 MeV/c (pulse-ht. + RF tof)s detected above 30 MeV/c (pulse-ht. + RF tof)• dedicated dedicated -- runs at 56 MeV/c & 103 MeV/c runs at 56 MeV/c & 103 MeV/c 56 MeV/c interesting since max. momentum 56 MeV/c interesting since max. momentum that can be transported to COBRA with that can be transported to COBRA with good optics SNM in BTSgood optics SNM in BTS• dedicated CEX run at 112 MeV/cdedicated CEX run at 112 MeV/c

Provisional ResultsProvisional Results -- Integral Spot Rates MHzIntegral Spot Rates MHzfor 1,8mA Proton Current & 4cm Target Efor 1,8mA Proton Current & 4cm Target E

Normalized to Momentum Slit Settings:Normalized to Momentum Slit Settings: FS41L/R 250/280 FS43L/R 240/220FS41L/R 250/280 FS43L/R 240/220

56 MeV/c 56 MeV/c RR = 7.6 = 7.6 ·10·1066 --/s/s slits open slits open

RR = 7.2 = 7.2 ·10·1055 --/s slits70/70/s slits70/7056 MeV/c 56 MeV/c RR = 7.6 = 7.6 ·10·1066 --/s/s slits open slits open

RR = 7.2 = 7.2 ·10·1055 --/s slits70/70/s slits70/70

ee--

μμ--

--

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 55

Beam Line Commissioning Results Phase BBeam Line Commissioning Results Phase BBeam Line Commissioning Results Phase BBeam Line Commissioning Results Phase B

Triplet 2Triplet 2

11

SolenoidSolenoidWIENWIEN

FilterFilter

ColliColli..TripTrip..µµ++

ee++ee++µµ++

• Optimization (Triplet I, Separator, Triplet II) - not so straight forwardOptimization (Triplet I, Separator, Triplet II) - not so straight forward• extensive beam divergence studies done over > 1m in vacuumextensive beam divergence studies done over > 1m in vacuum

3 tunes studied3 tunes studied

OptimalOptimal RateRate

OptimalOptimalSeparationSeparation

OptimalOptimal Rate + SeparationRate + Separation

MinimalMinimalDivergence Divergence DispersionDispersion

Beam Profile entrance BTSBeam Profile entrance BTS

Sep = OFFSep = OFF RRμμ = 1.11= 1.11·10·108 8 μμ++/s/s at 1.8 mA, 4cm TgEat 1.8 mA, 4cm TgE

Sep=-195kVSep=-195kV RRμμ = 1.09= 1.09·10·108 8 μμ++/s/s at 1.8 mA, 4cm TgEat 1.8 mA, 4cm TgE

XX~~ 17.6 mm 17.6 mm yy~~ 15.8 mm 15.8 mm

Separation e-Separation e-μμ ~~7.57.5 121 mm 121 mm physically physically

Transmission Factor (TII-> BTS) Transmission Factor (TII-> BTS) TTSEP195SEP195= 86.5% !!!= 86.5% !!!

Divergence Fits Divergence Fits Separator -195kVSeparator -195kVDivergence Fits Divergence Fits Separator -195kVSeparator -195kV

Hyperbolic Fit AxHyperbolic Fit Ax22+y+y22+Bxy=n+Bxy=n22

X-Waist 805mm DS TIIX-Waist 805mm DS TII x’= 10 mrad (fac5x’= 10 mrad (fac5))Y-Waist 735 mm DS TII Y-Waist 735 mm DS TII y’= 15 mrad (fac1.5y’= 15 mrad (fac1.5))

Mean Collimator position 760 mm DS TIIMean Collimator position 760 mm DS TII

Hyperbolic Fit AxHyperbolic Fit Ax22+y+y22+Bxy=n+Bxy=n22

X-Waist 805mm DS TIIX-Waist 805mm DS TII x’= 10 mrad (fac5x’= 10 mrad (fac5))Y-Waist 735 mm DS TII Y-Waist 735 mm DS TII y’= 15 mrad (fac1.5y’= 15 mrad (fac1.5))

Mean Collimator position 760 mm DS TIIMean Collimator position 760 mm DS TII

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 66

Beam Line Commissioning Results Phase B –cont.Beam Line Commissioning Results Phase B –cont.Beam Line Commissioning Results Phase B –cont.Beam Line Commissioning Results Phase B –cont.

Conclusions:Conclusions:• Transmission factor Transmission factor 86.5 %86.5 % achieved achieved• Better Separation Better Separation 7.5 7.5 , , 121 mm121 mm• Dispersion minimized up to entrance BTSDispersion minimized up to entrance BTS• Divergences reduced factor ~ Divergences reduced factor ~ 5 in x5 in x’’ factor factor 1.5 in y1.5 in y’’

Conclusions:Conclusions:• Transmission factor Transmission factor 86.5 %86.5 % achieved achieved• Better Separation Better Separation 7.5 7.5 , , 121 mm121 mm• Dispersion minimized up to entrance BTSDispersion minimized up to entrance BTS• Divergences reduced factor ~ Divergences reduced factor ~ 5 in x5 in x’’ factor factor 1.5 in y1.5 in y’’

Proposed Layout TripletII Proposed Layout TripletII BTS (allows all tune modes) BTS (allows all tune modes)

Simulation with Geant mustSimulation with Geant mustConfirm COBRA Spot-sizeConfirm COBRA Spot-sizefirst before freezing designfirst before freezing design

Simulation with Geant mustSimulation with Geant mustConfirm COBRA Spot-sizeConfirm COBRA Spot-sizefirst before freezing designfirst before freezing design

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 77

Implications Phase 2 CommissioningImplications Phase 2 CommissioningImplications Phase 2 CommissioningImplications Phase 2 Commissioning

Phase 2 Commissioning involves BTS + COBRA – High Rate & High Magnetic Field !!!Phase 2 Commissioning involves BTS + COBRA – High Rate & High Magnetic Field !!!

Present method – won’t workPresent method – won’t work

• 2-D Scanner2-D Scanner• Hamamatsu PMT R7400U Hamamatsu PMT R7400U • 2mm pill scintillator 2mm pill scintillator or 60cm Fibre-pillor 60cm Fibre-pill

Present method – won’t workPresent method – won’t work

• 2-D Scanner2-D Scanner• Hamamatsu PMT R7400U Hamamatsu PMT R7400U • 2mm pill scintillator 2mm pill scintillator or 60cm Fibre-pillor 60cm Fibre-pill

New Approach needed – COBRA New Approach needed – COBRA

• 3-D COBRA Magnet Measuring Machine3-D COBRA Magnet Measuring Machine• APDAPD• 2mm pill scintillator 2mm pill scintillator • He BagHe Bag

New Approach needed – COBRA New Approach needed – COBRA

• 3-D COBRA Magnet Measuring Machine3-D COBRA Magnet Measuring Machine• APDAPD• 2mm pill scintillator 2mm pill scintillator • He BagHe Bag

Hamamatsu R7400UHamamatsu R7400U PMTPMT• 8 stage8 stage• active dia. 8mmactive dia. 8mm • 300-650nm300-650nm• maxmax 420nm (Blue)420nm (Blue)

Hamamatsu R7400UHamamatsu R7400U PMTPMT• 8 stage8 stage• active dia. 8mmactive dia. 8mm • 300-650nm300-650nm• maxmax 420nm (Blue)420nm (Blue)

Sadygov-JINRSadygov-JINR APDAPD• micro-pixellatedmicro-pixellated• Geiger-modeGeiger-mode G~30k G~30k• 2.7x2.7 mm2.7x2.7 mm2 2 act.act.• 20k pixels/mm20k pixels/mm22

• 1 pix. 71 pix. 7μμ x7 x7μμ• 350-750nm350-750nm• maxmax 400nm (Blue)400nm (Blue)

Sadygov-JINRSadygov-JINR APDAPD• micro-pixellatedmicro-pixellated• Geiger-modeGeiger-mode G~30k G~30k• 2.7x2.7 mm2.7x2.7 mm2 2 act.act.• 20k pixels/mm20k pixels/mm22

• 1 pix. 71 pix. 7μμ x7 x7μμ• 350-750nm350-750nm• maxmax 400nm (Blue)400nm (Blue)

zz

rr

8mm dia.8mm dia. ““Golovin” type- green sens.Golovin” type- green sens. Gain 10Gain 106 6 3030μμ x 20 x 20μμ

xx

yy

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 88

APD Beam Test – LEMs Beam (APD Beam Test – LEMs Beam (μμE4) Dec. 2004E4) Dec. 2004APD Beam Test – LEMs Beam (APD Beam Test – LEMs Beam (μμE4) Dec. 2004E4) Dec. 2004

Goal: Confirm that beam phase space measurements with APD Goal: Confirm that beam phase space measurements with APD PMT measurements PMT measurements under “real” conditionsunder “real” conditions

PMTPMT2 mm 2 mm Pill Pill8.5 mm 8.5 mm Pill Pill

PMTPMT2 mm 2 mm Pill Pill8.5 mm 8.5 mm Pill Pill

APDAPD2 mm 2 mm Pill Pill

APDAPD2 mm 2 mm Pill Pill

With 2mmWith 2mmCHCH2 2 PlatePlate

- only e- only e++

With 2mmWith 2mmCHCH2 2 PlatePlate

- only e- only e++

No CHNo CH22

Th. 310mVTh. 310mV only only μμ++

some some Landau eLandau e++

No CHNo CH22

Th. 310mVTh. 310mV only only μμ++

some some Landau eLandau e++

Slow Slow Charge-sensitiveCharge-sensitive Preamp Preamp use TFAuse TFA

Slow Slow Charge-sensitiveCharge-sensitive Preamp Preamp use TFAuse TFA

RFRF

RFRF

APDAPD

APDAPD

• APD/PMT sensitivity approx. sameAPD/PMT sensitivity approx. same• APD eAPD e+ + sensitivity worse sensitivity worse noise higher noise higher

Solution:Solution:

• Peltier Element (cooling)Peltier Element (cooling)• green sens. APD + Bicron scint.green sens. APD + Bicron scint.

• APD/PMT sensitivity approx. sameAPD/PMT sensitivity approx. same• APD eAPD e+ + sensitivity worse sensitivity worse noise higher noise higher

Solution:Solution:

• Peltier Element (cooling)Peltier Element (cooling)• green sens. APD + Bicron scint.green sens. APD + Bicron scint.

Fourier Power SpectrumFourier Power SpectrumLow freq. + 50 MHzLow freq. + 50 MHz

Surface Muon Beam SignalSurface Muon Beam Signal

µµ++

µµ++

ee++ee++

ee++

µµ++

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 99

APD Beam Test – LEMs Beam (APD Beam Test – LEMs Beam (μμE4) Dec. 2004 – cont.E4) Dec. 2004 – cont.APD Beam Test – LEMs Beam (APD Beam Test – LEMs Beam (μμE4) Dec. 2004 – cont.E4) Dec. 2004 – cont.

APDAPD2 mm 2 mm Pill Pill

APDAPD2 mm 2 mm Pill Pill

PMTPMT2 mm 2 mm Pill Pill

PMTPMT2 mm 2 mm Pill Pill

PMTPMT8.5 mm 8.5 mm Pill Pill

PMTPMT8.5 mm 8.5 mm Pill Pill

Distance z ~ Distance z ~ zz00-26mm-26mm

Rate(Rate(µµ++) = 9.4 M/mAs ) = 9.4 M/mAs XX = 13.1 mm= 13.1 mm

YY = 14.8 mm= 14.8 mm

Distance z ~ Distance z ~ zz00-26mm-26mm

Rate(Rate(µµ++) = 9.4 M/mAs ) = 9.4 M/mAs XX = 13.1 mm= 13.1 mm

YY = 14.8 mm= 14.8 mm

Distance z ~ Distance z ~ zz00mmmm

Rate(Rate(µµ++) = 10.6 M/mAs ) = 10.6 M/mAs XX = 13.8 mm= 13.8 mm

YY = 15.7 mm= 15.7 mm

Distance z ~ Distance z ~ zz00mmmm

Rate(Rate(µµ++) = 10.6 M/mAs ) = 10.6 M/mAs XX = 13.8 mm= 13.8 mm

YY = 15.7 mm= 15.7 mm

Distance z ~ Distance z ~ zz00+18mm+18mm

Rate(Rate(µµ++) = 9.9 M/mAs ) = 9.9 M/mAs XX = 15.0 mm= 15.0 mm

YY = 16.4 mm= 16.4 mm

Distance z ~ Distance z ~ zz00+18mm+18mm

Rate(Rate(µµ++) = 9.9 M/mAs ) = 9.9 M/mAs XX = 15.0 mm= 15.0 mm

YY = 16.4 mm= 16.4 mm

115198

298

02468

1012141618202224

Rel. Rate

Vertical Positon {mm}

Raster Scan 2mm MEG Pill

22-24

20-22

18-20

16-18

14-16

12-14

10-12

8-10

6-8

4-6

2-4

0-2115

198

298

02468

1012141618202224

Rel. Rate

Vertical Positon {mm}

Raster Scan 2mm MEG Pill

22-24

20-22

18-20

16-18

14-16

12-14

10-12

8-10

6-8

4-6

2-4

0-2

ConclusionsConclusions• Method works – improvement to noise needed for eMethod works – improvement to noise needed for e++

• Rates compatible within beam/target variations ~ 5-10%Rates compatible within beam/target variations ~ 5-10%• Profiles compatible when corrected for Mult. Scatt.Profiles compatible when corrected for Mult. Scatt. • separately tested up to B = 8Tseparately tested up to B = 8T

ConclusionsConclusions• Method works – improvement to noise needed for eMethod works – improvement to noise needed for e++

• Rates compatible within beam/target variations ~ 5-10%Rates compatible within beam/target variations ~ 5-10%• Profiles compatible when corrected for Mult. Scatt.Profiles compatible when corrected for Mult. Scatt. • separately tested up to B = 8Tseparately tested up to B = 8T

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1010

New Components Status: SeparatorNew Components Status: SeparatorNew Components Status: SeparatorNew Components Status: Separator

Beam Beam Upstream Upstream SideSide

Beam Beam Upstream Upstream SideSide

BBeeaamm

BBeeaamm

• MEG design finished end Oct.MEG design finished end Oct.• all parts ordered or being manufacturedall parts ordered or being manufactured• 200 kV HV power supply delivered200 kV HV power supply delivered• magnet parts ordered delivery end Dec.magnet parts ordered delivery end Dec.• magnet power supply availablemagnet power supply available• magnet power cables laying shutdown magnet power cables laying shutdown Time scale:Time scale: Assembled + Tested ~ Beg. May 2005Assembled + Tested ~ Beg. May 2005

• MEG design finished end Oct.MEG design finished end Oct.• all parts ordered or being manufacturedall parts ordered or being manufactured• 200 kV HV power supply delivered200 kV HV power supply delivered• magnet parts ordered delivery end Dec.magnet parts ordered delivery end Dec.• magnet power supply availablemagnet power supply available• magnet power cables laying shutdown magnet power cables laying shutdown Time scale:Time scale: Assembled + Tested ~ Beg. May 2005Assembled + Tested ~ Beg. May 2005

PropertiesPropertiesVVmaxmax 200kV 200kV

DDplatesplates 19cm 19cm

LLeff eff 70cm 70cm

1885mm1885mm

22557799

mmmm

2371 mm2371 mm

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1111

New Components Status: BTSNew Components Status: BTSNew Components Status: BTSNew Components Status: BTS

2810 mm2810 mm

380 mm380 mm 460 mm460 mm

300 mm300 mm

2630 mm2630 mm

6 Main Components 6 Main Components (supply)(supply)

• Cryostat + Coils (BINP)Cryostat + Coils (BINP)• Cryo-Connector Chamber (BINP)Cryo-Connector Chamber (BINP)• Valve Chamber (PSI)Valve Chamber (PSI)• Support Stand (BINP)Support Stand (BINP)• Power Supply (PSI)Power Supply (PSI)• Cryogenic Transfer Lines (PSI)Cryogenic Transfer Lines (PSI)• Vac. & Window Flanges (PSI)Vac. & Window Flanges (PSI)

6 Main Components 6 Main Components (supply)(supply)

• Cryostat + Coils (BINP)Cryostat + Coils (BINP)• Cryo-Connector Chamber (BINP)Cryo-Connector Chamber (BINP)• Valve Chamber (PSI)Valve Chamber (PSI)• Support Stand (BINP)Support Stand (BINP)• Power Supply (PSI)Power Supply (PSI)• Cryogenic Transfer Lines (PSI)Cryogenic Transfer Lines (PSI)• Vac. & Window Flanges (PSI)Vac. & Window Flanges (PSI)

Main SpecificationsMain SpecificationsLLCryoCryo 2810 mm 2810 mm

DDBoreBore 380 mm 380 mm

DDCoilCoil 460 mm 460 mm

LLCoilCoil 2630 mm 2630 mm

BBMaxMax <0.5 T <0.5 T

IImaxmax 300 amps 300 amps

LLMaxMax 0.98 H 0.98 H

EEStoredStored 44 kJ 44 kJ

Main SpecificationsMain SpecificationsLLCryoCryo 2810 mm 2810 mm

DDBoreBore 380 mm 380 mm

DDCoilCoil 460 mm 460 mm

LLCoilCoil 2630 mm 2630 mm

BBMaxMax <0.5 T <0.5 T

IImaxmax 300 amps 300 amps

LLMaxMax 0.98 H 0.98 H

EEStoredStored 44 kJ 44 kJ

Time ScaleTime Scale

Materials procurement July 2004Materials procurement July 2004Purchase Order end July 2004Purchase Order end July 2004Contract Signed beg. Aug. 2004Contract Signed beg. Aug. 2004Design Approval (PSI) Nov. 2004Design Approval (PSI) Nov. 2004Production complete:Production complete:(Large Parts) (Large Parts) ** end Feb. 2005end Feb. 2005(Small Parts) end Jan. 2005(Small Parts) end Jan. 2005Assembly BINP Assembly BINP ** Feb.-Mar. 2005Feb.-Mar. 2005Performance Tests BINP Performance Tests BINP ** April 2005April 2005Delivery PSI (week 20) Delivery PSI (week 20) ** mid May 2005mid May 2005Installation+Installation+Acceptance Tests (6 weeks) Acceptance Tests (6 weeks) ** end June 2005end June 2005

Time ScaleTime Scale

Materials procurement July 2004Materials procurement July 2004Purchase Order end July 2004Purchase Order end July 2004Contract Signed beg. Aug. 2004Contract Signed beg. Aug. 2004Design Approval (PSI) Nov. 2004Design Approval (PSI) Nov. 2004Production complete:Production complete:(Large Parts) (Large Parts) ** end Feb. 2005end Feb. 2005(Small Parts) end Jan. 2005(Small Parts) end Jan. 2005Assembly BINP Assembly BINP ** Feb.-Mar. 2005Feb.-Mar. 2005Performance Tests BINP Performance Tests BINP ** April 2005April 2005Delivery PSI (week 20) Delivery PSI (week 20) ** mid May 2005mid May 2005Installation+Installation+Acceptance Tests (6 weeks) Acceptance Tests (6 weeks) ** end June 2005end June 2005

• Power Supply: – ordered delivery Mid-April 2005Power Supply: – ordered delivery Mid-April 2005• Control System – under designControl System – under design

Outstanding: Outstanding: • vac. + window flanges –Drawing Office vac. + window flanges –Drawing Office

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1212

New Components Status: BTS – cont.New Components Status: BTS – cont.New Components Status: BTS – cont.New Components Status: BTS – cont.

BTS Cryostat + Cryo-Connector ChamberBTS Cryostat + Cryo-Connector ChamberCryo-Connector ChamberCryo-Connector Chamber

Valve ChamberValve Chamber

connects toconnects toLHe transfer Line LHe transfer Line contains contains Joule-ThompsonJoule-ThompsonValves for controlValves for control

Valve ChamberValve Chamber

connects toconnects toLHe transfer Line LHe transfer Line contains contains Joule-ThompsonJoule-ThompsonValves for controlValves for control

Contains Contains cryo cryo ConnectionsConnectionsfor mainfor mainCryostatCryostat

Dewar i/PDewar i/P

CurrentCurrentleadlead

LHe i/pLHe i/p

LHe o/pLHe o/p

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1313

New Components Status: BTS – cont.New Components Status: BTS – cont.New Components Status: BTS – cont.New Components Status: BTS – cont.

Updated BTS Production ScheduleUpdated BTS Production Schedule

• cryostat cylinders – formed, machining still necessarycryostat cylinders – formed, machining still necessary• large cryostat end-flanges - made, final machining necessarylarge cryostat end-flanges - made, final machining necessary• tower flanges + internal parts – finished, assembly in progresstower flanges + internal parts – finished, assembly in progress• coil-support structure – ready for fibre-glassing + epoxying & bendingcoil-support structure – ready for fibre-glassing + epoxying & bending• coil manufactured – ready for formingcoil manufactured – ready for forming

1:1 tower drawing1:1 tower drawing on door on door

Delay 3-4 weeks expectedDelay 3-4 weeks expected compared with original schedulecompared with original schedule

Delay 3-4 weeks expectedDelay 3-4 weeks expected compared with original schedulecompared with original schedule

~ 50% delay~ 50% delay

non-technical non-technical nature – nature –

11StSt time Russia time Russia has has 2 weeks extra 2 weeks extra Christmas Christmas HolidaysHolidaysi.e. workshopsi.e. workshops closedclosed

~ 50% delay~ 50% delay

non-technical non-technical nature – nature –

11StSt time Russia time Russia has has 2 weeks extra 2 weeks extra Christmas Christmas HolidaysHolidaysi.e. workshopsi.e. workshops closedclosed

~ 50% delay~ 50% delay technical naturetechnical nature

delay coil supportdelay coil supportStructureStructure – – too long !!!too long !!!

~ 50% delay~ 50% delay technical naturetechnical nature

delay coil supportdelay coil supportStructureStructure – – too long !!!too long !!!

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1414

Vacuum System Beam Line + BTSVacuum System Beam Line + BTSVacuum System Beam Line + BTSVacuum System Beam Line + BTS

Pump Stands neededPump Stands needed• Beam Line: downstream of Triplet IIBeam Line: downstream of Triplet II• BTS Isolation vacuum up to interfaceBTS Isolation vacuum up to interface LHe Transfer LineLHe Transfer Line

Pump Stands neededPump Stands needed• Beam Line: downstream of Triplet IIBeam Line: downstream of Triplet II• BTS Isolation vacuum up to interfaceBTS Isolation vacuum up to interface LHe Transfer LineLHe Transfer Line

Trip ITrip I SEPSEP Trip IITrip II BTSBTSXX XX

XXXX

XX

PumpPump22

PumpPump33

PumpPump11

BTSBTSIsolation VacIsolation Vac

BeamBeamVacVac

PumpPumpSepSep

33μμDiff.Diff.windowwindow MylarMylar

WindowWindow

wallwall

Problem: high Bfield environment ~200 GProblem: high Bfield environment ~200 GMax allowed B~ 4mT (40G)Max allowed B~ 4mT (40G)• Combined Solution found Pump stand 3Combined Solution found Pump stand 3 Stray B ~20Stray B ~2030G30G• Components orderedComponents ordered• control system under designcontrol system under design

Problem: high Bfield environment ~200 GProblem: high Bfield environment ~200 GMax allowed B~ 4mT (40G)Max allowed B~ 4mT (40G)• Combined Solution found Pump stand 3Combined Solution found Pump stand 3 Stray B ~20Stray B ~2030G30G• Components orderedComponents ordered• control system under designcontrol system under design

4 Gauss4 Gauss

9 Gauss9 Gauss

9 Gauss9 Gauss30 Gauss30 Gauss

~60G~60G ~200G~200G

BBTTSS

BBTTSS

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1515

Cryogenic Transfer LinesCryogenic Transfer LinesCryogenic Transfer LinesCryogenic Transfer Lines

FromFromμμE4E4

LNLN22

CaloCalo

totoE3E3

EHEH

LNLN22

LHeLHe

LHeLHeBTSBTS

LNLN22

BTSBTS

LNLN2 2 –Transfer Line:–Transfer Line:

• Order placedOrder placed• delivery end Jan.2005delivery end Jan.2005• being installed NOW !!!being installed NOW !!!• available ~mid Feb. 2005available ~mid Feb. 2005

LNLN2 2 –Transfer Line:–Transfer Line:

• Order placedOrder placed• delivery end Jan.2005delivery end Jan.2005• being installed NOW !!!being installed NOW !!!• available ~mid Feb. 2005available ~mid Feb. 2005

LHeLHe –Transfer Line:–Transfer Line:

• Order placedOrder placed• delivery mid March 2005 delivery mid March 2005 • available beg April 2005available beg April 2005

LHeLHe –Transfer Line:–Transfer Line:

• Order placedOrder placed• delivery mid March 2005 delivery mid March 2005 • available beg April 2005available beg April 2005

LHe Transfer LineLHe Transfer Line

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1616

He Bag/Target SystemHe Bag/Target SystemHe Bag/Target SystemHe Bag/Target System

Final Layout He Bag SystemFinal Layout He Bag System

• Dimensions cannot be frozenDimensions cannot be frozen until Geant simulation with until Geant simulation with final beam optics confirmsfinal beam optics confirms beam phase space in COBRAbeam phase space in COBRA• He bag required between BTSHe bag required between BTS window & COBRA cryostatwindow & COBRA cryostat• Advantageous to fill COBRAAdvantageous to fill COBRA completely with He completely with He i.e. “COBRA-Bag”i.e. “COBRA-Bag”e.g. Minimize Mult.Scattering e.g. Minimize Mult.Scattering Maximize XMaximize X00

He/Vacuum interface ProblematicHe/Vacuum interface Problematic- Material/leakage- Material/leakagePosition determined by – optics, Position determined by – optics, degrader thickness degrader thickness - being finalized- being finalized

Final Layout He Bag SystemFinal Layout He Bag System

• Dimensions cannot be frozenDimensions cannot be frozen until Geant simulation with until Geant simulation with final beam optics confirmsfinal beam optics confirms beam phase space in COBRAbeam phase space in COBRA• He bag required between BTSHe bag required between BTS window & COBRA cryostatwindow & COBRA cryostat• Advantageous to fill COBRAAdvantageous to fill COBRA completely with He completely with He i.e. “COBRA-Bag”i.e. “COBRA-Bag”e.g. Minimize Mult.Scattering e.g. Minimize Mult.Scattering Maximize XMaximize X00

He/Vacuum interface ProblematicHe/Vacuum interface Problematic- Material/leakage- Material/leakagePosition determined by – optics, Position determined by – optics, degrader thickness degrader thickness - being finalized- being finalized

DegraderDegraderNo lossNo loss

12% He loss12% He loss 3% Decays3% Decays

Transmission Profile Transmission Profile (no Target)(no Target) Target SystemTarget System• Serious work will start when optics FrozenSerious work will start when optics Frozen i.e. post Geant simulation of final opticsi.e. post Geant simulation of final optics• simulation of non-stopped simulation of non-stopped μμ+ + as well as Michelsas well as Michels will also be done as He will also be done as He ½ target thickness ½ target thickness therefore therefore μμ+ + which miss Tgwhich miss Tg will stop at downstreamwill stop at downstream side of detectorside of detector

Target SystemTarget System• Serious work will start when optics FrozenSerious work will start when optics Frozen i.e. post Geant simulation of final opticsi.e. post Geant simulation of final optics• simulation of non-stopped simulation of non-stopped μμ+ + as well as Michelsas well as Michels will also be done as He will also be done as He ½ target thickness ½ target thickness therefore therefore μμ+ + which miss Tgwhich miss Tg will stop at downstreamwill stop at downstream side of detectorside of detector

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1717

Schedule 2005Schedule 2005Schedule 2005Schedule 2005

Changes 2005: Changes 2005: (compared to previous schedule)(compared to previous schedule)

• Shutdown only 3 monthsShutdown only 3 months• BTS Schedule + 6 weeksBTS Schedule + 6 weeks• target design + manufacture extendedtarget design + manufacture extended

• Separator delay + 1monthSeparator delay + 1month• shift of Gotta et al. by 4 weeks???shift of Gotta et al. by 4 weeks???

P.-R KettleP.-R Kettle MEG Review February 2005MEG Review February 2005 1818

Summary PointsSummary PointsSummary PointsSummary Points

Beam Line / Detector Design:Beam Line / Detector Design:

1.1. Extensive Beam test made during Commissioning 2004 – Extensive Beam test made during Commissioning 2004 – • excellent transmission intensityexcellent transmission intensity• good separation qualitygood separation quality• several optics studiedseveral optics studied

2.2. Study of Study of - - beam for detector calibration donebeam for detector calibration done3.3. Beam Line component design BTS, Separator finalized & under constructionBeam Line component design BTS, Separator finalized & under construction4.4. Beam line infrastructure LNBeam line infrastructure LN2,2, LHe transfer lines, vacuum systems LHe transfer lines, vacuum systems

designs finished & ordered + installation starteddesigns finished & ordered + installation started

5.5. Final GEANT simulation of the optimized optics underway to Final GEANT simulation of the optimized optics underway to define FINAL LAYOUT incl. Platform/COBRAdefine FINAL LAYOUT incl. Platform/COBRA6.6. He-Bag System design discussions underway He-Bag System design discussions underway “COBRA-BAG” “COBRA-BAG”7.7. Now have PSI Design Engineer for Now have PSI Design Engineer for Target / He-bag System as well as Beam Line componentsTarget / He-bag System as well as Beam Line components

Beam Line / Detector Design:Beam Line / Detector Design:

1.1. Extensive Beam test made during Commissioning 2004 – Extensive Beam test made during Commissioning 2004 – • excellent transmission intensityexcellent transmission intensity• good separation qualitygood separation quality• several optics studiedseveral optics studied

2.2. Study of Study of - - beam for detector calibration donebeam for detector calibration done3.3. Beam Line component design BTS, Separator finalized & under constructionBeam Line component design BTS, Separator finalized & under construction4.4. Beam line infrastructure LNBeam line infrastructure LN2,2, LHe transfer lines, vacuum systems LHe transfer lines, vacuum systems

designs finished & ordered + installation starteddesigns finished & ordered + installation started

5.5. Final GEANT simulation of the optimized optics underway to Final GEANT simulation of the optimized optics underway to define FINAL LAYOUT incl. Platform/COBRAdefine FINAL LAYOUT incl. Platform/COBRA6.6. He-Bag System design discussions underway He-Bag System design discussions underway “COBRA-BAG” “COBRA-BAG”7.7. Now have PSI Design Engineer for Now have PSI Design Engineer for Target / He-bag System as well as Beam Line componentsTarget / He-bag System as well as Beam Line components

Critical Paths for Detector Time Schedule 2005:Critical Paths for Detector Time Schedule 2005:

• BTS delivery Mid May 2005BTS delivery Mid May 2005• Separator completion Beg. May 2005Separator completion Beg. May 2005• BTS Power Supply delivery April 2005BTS Power Supply delivery April 2005• He-Bag for beam measurementsHe-Bag for beam measurements

Critical Paths for Detector Time Schedule 2005:Critical Paths for Detector Time Schedule 2005:

• BTS delivery Mid May 2005BTS delivery Mid May 2005• Separator completion Beg. May 2005Separator completion Beg. May 2005• BTS Power Supply delivery April 2005BTS Power Supply delivery April 2005• He-Bag for beam measurementsHe-Bag for beam measurements