Luminosity Monitor MWPC status report A.Kiselev OLYMPUS Collaboration Meeting DESY, Hamburg, 09.09.2011
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Transcript
Luminosity Monitor MWPC status report
A.Kiselev OLYMPUS Collaboration Meeting
DESY, Hamburg, 09.09.2011
Layout of the talk
Installation in the experiment Survey and alignment Performance in the august test run ToDo list
Installation at DORIS July 2011
Missing part of equipment delivered to DESY and tested on time Installation in the experiment went smoothly No apparent conflicts with other subdetectors seen Cabling work done Installation in the EH is complete
Installation at DORIS July 2011
Installation at DORIS July 2011
Installation at DORIS July 2011
Survey and alignment
3-6 target nests per chamber ~150um per point matching accuracy in XY-directions
-> quite some work and effort from the MEA team!
Survey and alignment
X,[mm] Y, [mm] Z, [mm] rX, [deg] rY,[deg] rZ, [deg]
MWPC-L1 8.88 +/- 0.08
-4.52 +/- 0.09 1993.0 +/- 0.4
-0.47 +/- 0.10 0.17 +/- 0.10 1.21 +/- 0.05
MWPC-L2 11.38 +/- 0.08
-1.46 +/- 0.09 2329.6 +/- 0.4
-0.29 +/- 0.10 0.10 +/- 0.10 0.21 +/- 0.05
MWPC-L3 13.39 +/- 0.06
-0.31 +/- 0.06 2690.2 +/- 0.3
-0.02 +/- 0.07 0.07 +/- 0.07 0.49 +/- 0.04
MWPC-R1 -5.21 +/- 0.08
-8.15 +/- 0.09 1987.6 +/- 0.4
-0.28 +/- 0.10 0.26 +/- 0.10 -1.17 +/- 0.05
MWPC-R2 -5.14 +/- 0.25
-5.66 +/- 0.28 2324.1 +/- 0.4
-0.20 +/- 0.35 0.09 +/- 0.30 -0.71 +/- 0.05
MWPC-R3 -5.77 +-/ 0.09
-3.53 +/- 0.09 2686.4 +/- 0.4
-0.57 +/- 0.11 0.00 +/- 0.10 -0.61 +/- 0.05
chambers are more or less in place ~100um positioning accuracy (stat. errors only)
-> NB: data quoted in 12-degree rotated system!
August 2011 test run at DORIS
Small leakage currents (typically below 100nA per plane) Low hit occupancy (typically 1 hit per plane for “track
candidate events”) No issues with the readout No trips, even during injection
-> in general: very reasonable performance!
Test run wire maps (left arm)
Test run wire maps (right arm)
MWPC ToDo list till Feb’2012
Replace few preamplifier cards Arrange temperature measurement (+ respective Slow Control) Design/manufacture/install/test SiPM-based trigger scintillators Consider CROS3 2.5ns-slice firmware upgrade
Manufacture/ship/test a spare MWPC
Install CAEN multichannel TDC Tune DAQ driver
Finalize survey/alignment Verify efficiencies; select working conditions
Finalize software integration
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