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Muon Piquet Report week 24

Muon Piquet Report week 24. Burkhard Schmidt Diego and Patrizia kindly served as piquet on June 18 and 19. Many thanks!. LHC Status Mo Morning 20 -June. 7 runs. LHC Status Run Statistics 13- 20 June. Main Delays: Cryo injection oscillations / losses

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Muon Piquet Report week 24

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  1. Muon Piquet Report week 24 Burkhard Schmidt Diego and Patrizia kindly served as piquet on June 18 and 19. Many thanks!

  2. LHC Status Mo Morning 20-June 7 runs

  3. LHC Status Run Statistics 13-20June Main Delays: Cryo injection oscillations / losses Fills 1868 and 1871 used by LHCb for studies with higher luminosities

  4. LHCb Luminosity

  5. Running the detector at 3.5 x 1032/cm2/sFill 1868 • During data-taking at a luminosity of 3.4-3.5 x 1032/cm2/s we had 10 trips, and 11 in total during fill 1868. Given the increase in luminosity this is rather normal.No problems with system operation.

  6. Running the detector at 4 x 1032/cm2/sFill 1871 • The Muon System did not show problems and only a five trips occurred. • Currents on GEM A17A2 R/L reached the values of about 7400 nA, three more GEM chambers exceeded the value of 5000 nA.  All in all, pretty good.

  7. Intervention on Thursday (Access) Was very successful: • four HV RDB-boards replaced: • RDB#4 by RDB#12 - M2C DOWN, • RDB#11 by RDB#30 -M2C UP, • RDB#53 by RDB#52 and • RDB#55 by RDB#67 - M5A UP. • Gap in the muon chamber (M5R4 on A-side) with short circuit inside has been disconnected from HV-system (jumper removed from PP), • In addition, we swapped SYNC chips inside of ODE board (R41 on M1A) in order to better understand the problem with L0-MUON data mismatches.

  8. SYNC problem in M1A is fixed

  9. … but timing for one ODE in M1R4 not optimal

  10. Muon System Status Friday 17/06 • A check of the replaced HV-boards (RDBs) revealed that we have no radiation problems there; however, the chambers connected to the boards need more conditioning. • The number of gaps tripping in the fill 1875 is less than usual (only 2 in nearly 6 hours). Maybe the running at higher lumion Tuesday and Thursday was beneficial...

  11. HV - Status

  12. HV - Status

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