DIRC Operations Weekly Report

Period: Wednesday 2007/6/19 - Wednesday 2007/6/27

Oncall: Justine Serrano
Fast Monitoring: Justine Serrano, Alejandro Perez


    PEP Activities     BaBar Activities     DIRC activities     Backgrounds     Scheduled activities     Pending Work     Links

Luminosities this week

PEP peak lumi: ~1 x 1034 (last week: ~1 x 1034)

PEP delivery: 1.92 fb-1 (last weeks: 2.27 fb-1)

BaBar integrated lumi:1.76 fb-1 (last weeks: 2.2 fb-1)

Run 6 total delivery: 51.02 fb-1

Run 6 total BaBar recorded: 49.05 fb-1 total, including 4.18 fb-1 off-peak data

PEP activities/issues this week

  • 06/20: transition from OffPeak -> OnPeak.
  • 06/21 to 06/22: ROD. They replace a bellow in arc3. Leak discovered in sec 20 of the Linac, they decided not to fix it during the ROD. Starting injecting on 06/22 at 17:05.
  • 06/23: PEP recovered a normal luminosity.

    BaBar activities/issues this week

  • 06/21: ROD. Tried to fix a EH cooling problem but the spare didn't fit.
  • 06/24: DCH had a problem with an electronic box inside the DIRC tunnel. We need a new ROD to fix that.

    DIRC activities/issues this week

  • 06/21: ROD. We turned off the HV, FEE crates and the chiller. Mike replaced a connector card at the back of the chiller power siam.
  • 06/21, while BaBar was starting to take cosmics, we lost the monitoring of sector 5. Calibration and a cosmic run showed that data is still ok. The corresponding alarm has been masked in epics and in the alarm handler, and DIRC has been made runnable again by bypassing sector 5 monitoring.
  • After the ROD, HV group 1 in sector 0 tripped because of the Xmas tree. Jose set the runnable value at 900V so that it didn't trip anymore.

    See DIRC logbook for details

    Lumi and Background this week

    Scheduled activities

    Pending Work

    Manpower situation

    Alejandro, Justine and Jose rotating backup & on-call commissioning duties.