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PS VFE & PS/SPD FE Electronics Status and Plans
20 February 2008
LPC Clermont
2
PRS C Side Dommages
PS cables damaged in detector movement (pulse generator):
Cut cables: 1 RJ45 signal (SM4T-01) 1 LED trigger cable (SM3)
+ other cables suspected damaged ( LV PRS VFE, RJ45 signal, LED trigger ? )
PRS TOP boxes oppened last week & fully checked: LV connectors pulled out of VFE (by pulse generator?): re-connected No other PRS hard damage / RJ45 cut cable / spare used & cable repaired
All C side VFE and their connections tested functionnal last week
4 VFE were seen KO in SM4 Top
3
PRS VFE Powering & Cooling
VFE Marathons ‘patched’ on both sides. PRS voltages re-tuned @ ±4 V, following J. Lecoq ‘expert’ recommendation.
All VFE LV power channels fused and connected on patch pannel: A + C side.
VFE Cooling installed on A side (thanks Philippe!). Restored yesterday, both sides, after some confusion …
Temperature is Monitored:
varies from, All OFF: 18-20 ºC to All ON: 25-27 º C ( I confirm … )
Issue on PRS SM7 Bottom box. Not cooled. Air buble in the pipe? Under investigation.
4
DAQ: FEB / CROC Exchange PRS2/PRS3
BEFORE
BEFORE
AFTER
AFTER
PRS3 PRS2
5
DAQ: FEB / CROC Synchronisation C Side(8 FEBs)
6
DAQ: FEB / CROC Synchronisation A Side
(8 FEBs)
7
Outlook
C side operational: CROC sync. Issue (PRS2 now) Calibration measurements ongoing for VFE synchronization
A side close to operational: CROC sync. Issues (PRS4 & ~PRS7) Cooling issue on SM7 Bottom Calibration measurements required for VFE synchronization