1 / 7

PS/SPD Electronics Installation and Commissioning

PS/SPD Electronics Installation and Commissioning. 4 September 2007. LPC Clermont. PS/SPD FEB Production Status. Production & Tests closely finished : 106 PS/SPD FEB produced / 94 Valid / 100 required !!. A side. 5 last boards in production but troubles expected

demetria-lott
Télécharger la présentation

PS/SPD Electronics Installation and Commissioning

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PS/SPD Electronics Installation and Commissioning 4 September 2007 LPC Clermont

  2. PS/SPD FEB Production Status • Production & Tests closely finished: 106 PS/SPD FEB produced / 94 Valid / 100 required !! A side • 5 last boards in production but troubles expected • 9 M20 component missing • Go to pile of failed boards (12) • Repair • Extract M20 Vacations Run out components C side 23/07 23/08 26/07 16/07 22/06 06/07 29/08 11/07 Pres.

  3. FE Installation Status • C side fully equipped, cabled & tested: All FE OK - RJ45 signal cables (VFEFE ): 3 dead contacts @ FE side within 4 weeks in August / But …FE crates not ‘closed’ @ moment • A side installation ongoing … - 3 crates close to ready: PRS4, PRS5 & PRS6 - PRS7: more FE boards required & No connectors for power cables A side installation status

  4. RJ45 RJ45 RJ45 RJ45 VFE ‘POWER’ ISSUES • 7 out of 50 C side VFE no more working in July: They were left functional in may / but some operations in boxes meanwhile … - All located in bottom boxes - Same symptoms: identical half channels / as if no CLOCK - Re-plugging power cables can solve the problem / but power consumption measured OK … -  impedance measured on VFE clock input whenever measured … • 2 more C side VFE ‘lost’ during August: Left functional in July / Located in top boxes /  impedance measured on clock / no operations in these boxes ! VFE electronics CLOCK VFE connectors RJ45 Signal Signal power Schematic of VFE ( 2 boards + connectors)

  5. PS LEDs Flashed on C side • PS LEDs Flashed on almost all C side: No light in Inner part ? HOT No Light Seen ? COLD A side C side

  6. Dead Channels ? • Track Dead Channels with a neighbouring criteria: - Neglect PMT gain dispersion: ~50 % effect - Compare to cross talk level: ~10 % / But no clear border 20% x-talk on Q To do: compare to Evgueni measurements 27 / 2496 channels 13 / 39 FEBs Border ?

  7. Conclusion • PS/SPD FEB production almost finished : C side fully equipped & tested A side following by the end of the month Issue with VFE clock input: fragile on timescale ~month Lock & further monitor VFE  FE RJ45 signal link • C side almost fully flashed with LEDs Future: look @ t0, a / procedure to adjust FEBs phasers

More Related