CM23 - CKOV Status Report

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CM23 - CKOV Status Report• CKOV1/2 Installed and cabled in DSA• T %RH recording• Pulser Runs Aug '08 to set HV – MICE Note 225• Electron run Sep '08 – MICE Note 226 (more Nov/Dec '08)• Nov/Dec '08 run analyses in progress

L. Cremaldi U. Mississippi MICE CM22 RAL Oct 19, 2008

Jan '08

Jan '08

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Cherenkov Threshold Curves- 1.07 Aerogel

0.0

5.0

10.0

15.0

20.0

25.0

30.0

0.2 0.3 0.4 0.5 0.6GeV/c

Npe

electron

muon

pion

kaon

proton

Cherenkov Threshold Curves- 1.12 Aerogel

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

0.2 0.3 0.4 0.5 0.6MeV/c

Npe

electron

muon

pion

kaon

proton

380 MeV/c

280 MeV/c

Response to Beam

e

e

p

p

Kaplan/Cremaldi MICE CM23 RAL Jan13-16, 2009 -Harbin

• Ckova and Ckovb have good response to =1 electron beam. Used for =1 gain calibration.

• 300 MeV pions will leave 1-2 PE in Ckova. Can be used for 1PE determination.

• 400 MeV protons below threshold and can be used for noise level determination.

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CKOV Ops Manual version-2


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VME - V1290A32 Channel Multihit TDC

TOF/Ckov Readout

VME - V17248 Channel 100 MHz FADC

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T and %RH monitoring

• To ensure dry conditions in damp UK weather! • Temperature and %RH sensors installed + N2 Flow ~ 0.1 SCFH. • One T / %RH set per CKOV.• Readback in control room. • Temperature monitor chips have failed (non-critical). • MOM daily checklist appreciated!

CKOV a,b Corrected %H Data

20.00

25.00

30.00

35.00

40.00

45.00

1 2 3 4 5 6 7 8 9 101112131415161718192021222324252627

daily reading

%H

Series1

Series2

32%RH

Aug

Sep

L. Cremaldi U. Mississippi MICE CM22 RAL Oct 19, 2008

Dec

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thor:~ cremaldi$ cd MICE_ROOTthor:~/MICE_ROOT cremaldi$ ls00505.root 00689.root 00850.root 00865.root 00884.root00506.root 00690.root 00851.root 00866.root 00885.root00507.root 00784.root 00852.root 00867.root 00886.root00508.root 00785.root 00853.root 00868.root 00888.root00509.root 00786.root 00854.root 00869.root 00889.root00537.root 00787.root 00855.root 00870.root 00892.root00643.root 00788.root 00856.root 00871.root00684.root 00789.root 00859.root 00872.root00686.root 00790.root 00860.root 00882.root00688.root 00849.root 00864.root 00883.root

Monitoring and Analysis

• Routinely moving MICE files to UMiss for monitoring.

• Standard run sheets badly needed with beamline and trigger config.

Nov runsDec runs


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LED Pulser Runs – Set 1PE level

PULSER

ckova

ckovb

DAQ

trig

• Special Pulser runs taken to set 1PE gain.• Also good for monitoring of PMT drifts.• System needs improvement for non-experts.

1pe

ped


fadc

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fADC Ckov Online Monitoring

• (max – min) algorithm used by online program for pulse height.• Good for stable signals.

PH

PH


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Peak mean vs PMT Voltage

25.0

35.0

45.0

55.0

65.0

75.0

85.0

95.0

105.0

1450.0 1500.0 1550.0 1600.0 1650.0 1700.0 1750.0 1800.0 1850.0

PMT Voltage

peak mean - Pedistal

Ch0Ch1Ch2Ch3Ch4Ch5Ch6Ch7

ch5

ch0

ch3

ch2

ch4

ch6ch1

ch7

CKOV HV Tuning – MICE note 225


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Run 784 300 MeV/c pi+ tof0 trig

Channel PED 1-pe0 13.6 55.91 13.6 61.42 13.6 52.23 13.6 57.74 13.6 57.75 13.6 59.66 13.6 55.97 13.6 59.6


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Run 789 100 MeV/c electrons tof0 trig

Channel PED 1-pe Signal-peak npe N-total N-pred0 13.6 55.9 207 4.57 90 (1-1/n^2)2.3cm1 13.6 61.4 213 4.172 13.6 52.2 214 5.193 13.6 57.7 210 4.45 18.39 26.204 13.6 57.7 239 5.115 13.6 63 216 4.106 13.6 54 239 5.587 13.6 54 261 6.12 20.91 41.98


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Run 855 417 MeV/c protons Tof0 trig

• Large Ckov signals may indicate some fADC problem?• fADC looks bistable or pions vs protons? JSG?

p

13

Future plans

• Work on LED Calibration Pulser.• Rework T/%H Monitor. • Install 500 MHz fADC - no shaper needed for higher rates? JSG• More analysis w G4MICE package – tagged beam.• Thank you for your attention!


Documents

CM23 - CKOV Status Report