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PS VFE & PS/SPD FE Electronics Status and Plans. 21 November 2007. LPC Clermont. PS/SPD FEB Production Status. Production & Tests finished : 112 PS/SPD FEB produced (including 2 prototypes) 100 installed - PowerPoint PPT Presentation
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PS VFE & PS/SPD FE Electronics Status and Plans
21 November 2007
LPC Clermont
2
PS/SPD FEB Production Status
Production & Tests finished:
112 PS/SPD FEB produced (including 2 prototypes)
100 installed
8 boards shipped back to Hitachi for reparations / returned to LPC / in testing
Hard bug spotted on FE current limiters thresholds ( DL1 & DL2 ):
currents in FEPGA increases by 0.2-0.3 A when connecting VFE to FE / whatever VFE/FE activity current limit underestimated
current limit hard controlled by a resistor value / increased to max value of 2 A ( nominal 1.6 A expected )
3
FEB Installation Status
All 100 FE boards patched for 2 A, ‘on flight’ in pit 8.
1+ week work for de-cabling / soldering / re-cabling
C side fully tested:
- New 2 A limit: All FE/VFE couples checked OK
- RJ45 cabling (VFE/FE ): 2 pathologic channels ( SM3 & SM4 Top) / RJ45 cable or VFE side connection problem
A side testing ongoing …
- 25 % done ( PRS6 + ½ PRS5 )
- 1 dead VFE/FE contact / FE connector suspected PRS5-FE02
- Last board FE 106 installed last week / Tests required
4
VFE Sagita Issues
Sagita on back of VFE boards lost of connection for CLOCK signal / Due to ?
- Stresses through VFE RJ45 cables / in detector movements
- ‘Natural’ relaxation of the VFE board / in time
Statistics:
- C side: 7 / 50 VFE lost from may to July
2 / 50 VFE lost from July to September
2 / 50 VFE lost from September to November
- A side: 2 / 50 VFE lost from may to September
No loss from September to November
VFE electronics
VFE connectorsRJ45
RJ45RJ45 RJ45 RJ45
CLOCK
Signal Signalpower
Schematics of VFE ( 2 boards + connectors): sagitta caused by ?
5
Marathon PSU Issues
Marathon power supply unit (PSU) PRS7 dead
- shortcut suspected @ 380 V connector @ Marathon side (platform) / To be confirmed
- PSU returned for repair / Bldg 4. / No spare ? / How long ?
Pathologic channel 0 on Marathon VFE PSU / Both sides! / Pending issue
- C side: SPD is concerned
- A side: PS is concerned
6
VFE Temperature Monitoring & Cooling
Monitoring of VFE temperatures functional (ELMBs / PVSS)
Cooling installed !
- Water leakage alert on Sunday 11 November / But … the cooling was turned off on Friday 9 ???
- To be commissioned
SM4-VFE05 / No cooling VFE ON
Neighbour VFE ONAll OFF
( degrees C / hours )
7
Prospects
Commissioning:
- Get to work with CROC V4 & final specs setup / DAQ tests
- VFE cooling stress tests
- Flash A side channels with LEDs
Calibration:
- Set internal Phasers FE/VFE for DAQ
Monitoring:
- FE/VFE connectivity / Periodic survey
Foreseen strategy: 1st Validate remote operation with CROC V4 in PRS0 / commission cooling This will allow automatisation of calibration & monitoring tasks