Installation Status Remaining Issues RIKENRBRC Itaru Nakagawa 1
Installation Status Remaining Issues RIKEN/RBRC Itaru Nakagawa 1
North Activities @ IR this week • Restore OASys cameras after scaffold disassembly, night shot. • 50 ohms registers installation of calibration pulse, N. St-3, Oct-6&7, Gap-2 • ADTX communication check St. 2 2
Repair work Calibration Pulse (N. St-3, Oct-6&7, Gap-2) Consistent with other gaps ~ 600 -> OK! 3
North Arm Concerns Location Problem Effect Solution St 3, Oct 8, Gap 2 Deformed calibration pulse Time smearing test Negligible effect on gain St 3, Oct 6&7, Gap 2 Large calibration pulse Timing different, ADC saturation Add 50 ohm registers St 3, Oct 4&5 Deformed calibration pulse Time smearing test Negligible effect on gain St-3, Oct-1 Noise > 5 Resolution Higher HV? 4
South Activities @ IR this week • • Completed South power/GTM infrastructures Cathode cables, ADTX-FEE install Noise & Performance tests (HV on/off) Noise hunting after decap. Work OASys illuminator repair Inconsistent cathode cabling btwn octants Improved ground connections (Jimmy) Station-1 Scaffold Disassembly (carpenters) 5
Inconsistent Cabling • Updated DB for Octant-6, station-3 [11/30/08 17: 06]. • North arm – station 3, octnat 5, half octant 0, cathodes 0 and 2, strip#226~240 Updated DB, OK – station 1, octant 0, half octant 0, gap 2, cathodes 0 and 2. To be confirmed soon. • South arm – station 3, octant 2, half octant 1, gap 1, cathode 0 and cathode 2 (counting from 0); – station 1, octant 0, half octant 0, gap 0, cathodes 0 and 2. Consistent with Actual Cabling. OK 6
South Station-3 Noise Status Under Investigation 7
South Station-2 Noise Status U n d e r I n v e s t i g a t i o n ADTX Installed 8
Noise Increase after Decap ADTX Installed 9
Strip#1~32 -> Chasis-1 South, St-1, Oct-2 10
Disconnected HV cable from Gap-1 Noise Hunting (South St-1, Oct-3) 11
HV on (red) vs. HV off (black) Noise Hunting (South, St-1, Oct-3) 12
South Station-1 Scaffold Activity • Mu. TRG • Mu. TR decapacitation • Absorber Install December Schedule OASys Maintenance Platform Done SMT 4 Install Optical chain test Cable to Rack South Cabling Mu. TR Decap. OASys Maintenance Plumming North Scaffold Disassembly Rack Control Power ADTX-FEE Cable install St 1 Board install LV test Board Test Noise Check Fake Hit, Calibration Noise hunt Board install Board Test LV test, ADTX Cable Noise Check Install St-2, St-3 Fake Hit, Calibration South St. 1 Scaffold Disassembly North Station-1 Access & Lampshade Close -> January? Tsutomu, Itaru -> Japan 13
To be done for Station-1 Man Lift Fix ID bit Chs-2, B 2 D 3 ->23 West Thermocoupe not working Noisy Signal Cable Chassis-1, Cable-4 East Noisy Signal Cable Chassis-1, Cable-6 Noisy Signal Cable Chassis-1, Cable-8, 16 Reduce elevation of chassis Noisy Signal Cable Chassis-5, Cable-8 14 Lost communication w/ boards
Remaining Tasks @ IR • North Station-1 Access (before Friday) • Fix 6 dead trunk cables Dec. 29 • OASys – (Temporary) remove bottom platform and stairs for Oct. 6 -8, possible alignment – Replace camera#41 by spare – Play with light source alignment in St-1, North? – Long data taking with lights off • ADTX check, North Station-3 • Noise reduction St-2&3, South • South final check list, e. g. visible check, firm connections, etc. 15
Backup Slide 16
Collapsed Calibration Pulse in Station-3, Octant-8 17
Man Power 18
January Schedule PHENIX Closing EC rolls in Central Magnet in Run position 19
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