1 / 7

MP3 report – week 20-21 12/5/2010 – 19/05/2010

MP3 report – week 20-21 12/5/2010 – 19/05/2010. MP3/QPS team in CCC. MP3 interventions . Weeks 20-21. General Issues. Very quiet week for hardware issues

chul
Download Presentation

MP3 report – week 20-21 12/5/2010 – 19/05/2010

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. MP3 report – week 20-21 12/5/2010 – 19/05/2010 MP3/QPS team in CCC LMC: 19th May 2010

  2. MP3 interventions LMC: 19th May 2010

  3. Weeks 20-21. General Issues • Very quiet week for hardware issues • Multiple problems during entire week with board A of circuits RQS.L7B2, RQTL11.L2B2, RQTL11.L5B1: everytime after combo to be switched to Board B. • Already known problem • Waiting for technical stop • EiC will be authorized to do safe operations • Three interventions from home during the night. • Extremely slow connection and time-out after a while • Bottleneck seems to be the CERNTS server. (Pierre Charrure) LMC: 19th May 2010

  4. Communication problem with nQPS (I) • RB.A12, RQD/F.A12 lost the communication during ramping on 12th May. • Power cycling required to re-establish communication only 12 hours later. • Heaters fired in C12L2, A13L2 and C13L2 (all the magnets monitored by that crate) but not post-mortem files generated LMC: 19th May 2010

  5. Communication problem with nQPS (II) • Do we need to interlock the QPS_OK with the energy? • Not sure if the detection is working correctly • Symmetric quench and bus-bar protection for one cell equivalent • QPS team looking at the problem. • Tests in the lab done without being able of reproducing the fault. • If the fault reappears, hardware expert needs to be called to do diagnostics LMC: 19th May 2010

  6. Orbit correctors issues • RCBXH1.L1 trip on Saturday 15th due to 0 V crossing during the ramp-down combo • 24 orbit correctors tripped due to orbit feedback on Monday, 18 and 16on Tuesday. Three times since Monday. Not understood yet. LMC: 19th May 2010

  7. Water fault in main PS • water fault in RB.A34 on Tuesday 18th May • quench heater in C15L4 fired as a consequence of the energy extraction. • At 2500 A • -2 A/s • ... LMC: 19th May 2010

More Related