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