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 ±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: ºC to All ON: 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 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