1 / 11

Power Interlock Controller LHC P1 – R2E issue ?

A. Antoine. Power Interlock Controller LHC P1 – R2E issue ?. A. Antoine (TE-MPE-MI). Power Interlock Controller (PIC).

csteele
Download Presentation

Power Interlock Controller LHC P1 – R2E issue ?

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. A. Antoine Power Interlock ControllerLHC P1 – R2E issue ? A. Antoine (TE-MPE-MI) 26 June 2018

  2. Power Interlock Controller (PIC) The Powering Interlock System is designed to ensure the permission for safe powering of the different electrical circuits comprising superconducting magnets installed around the accelerator Introduction • 28 powering subsectors • 36 interlock controllers (2 for long arcs) 26 June 2018

  3. Power Interlock Controller (PIC) Hardware Layout (principle) 26 June 2018

  4. Power Interlock Controller (PIC) History • Main beam dump cause of the PIC during 2010-2012 period attributed to particle fluence higher than expected (memory corruption) • Mitigation action: relocation of 9 PLCs • From UJ14/16 to UL14/16 • From UJ56 to UL557 No more events observed after relocation …Until 8/2017 26 June 2018

  5. LHC P1 area 26 June 2018

  6. PIC in LHC Point 1 3 failures in 9 months: • Same signature: PLC Firmware error • Same location: LHC point 1 • 22/08/2017: PIC.AL1 (UL14) • 10/05/2018: PIC.AR1 (UL16) • 12/06/2018: PIC.XR1 (UL16) Recent Failures 26 June 2018

  7. PIC in LHC Point 1 UL14 RadMON - from 30/03 until 14/06: • phi_HEH ~ 4.5*10^6 HEH/cm^2 • phi_th ~ 2.3*10^8 n/cm^2 UL16 RadMON  - from 30/03 until 14/06: • phi_HEH ~ 1.5*10^6 HEH/cm^2 • phi_th ~ 2.8*10^8 n/cm^2 Curent conclusion (Giuseppe Lerner): • HEH fluences under safety margin against SEU • On the contrary the thermal neutron fluences are higher, and are measured with good statistical accuracy (roughly 200 SEU counts in both RadMONs). R2E issue ? 26 June 2018

  8. Request We request additional measurements closer to our equipment to exclude radiation effect as the source of the PIC failures. 26 June 2018

  9. Conclusion • 3 major failures in the 9 previous monthsall located at point 1 with same signature of memory corruption • PIC-PLCs at point 1 are the closest from the LHC • No clear explanation and radiation effect under consideration • Additional measurement requested 26 June 2018

  10. Thank you for your attention 26 June 2018

  11. 26 June 2018

More Related