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Shift Duties - MuSun Run 3 DRAFT

Overview

The primary responsibility of the shift crew is to maintain safe experimental conditions and take efficient and high quality data.
The shift crew can leave the experimental barrack temporarely.

Main routine tasks:

  • Familiarize yourself with the manuals.
    The latest version is maintained in electronic form. Caution, not all parts are updated. The old MuCap pdf manual is posted here.
  • Read the recent elogs and the ShiftCheckList_Run3.xls on zurban.
  • Follow measurement plan (verbal, white board or from log book)
  • Make sure that DAQ s running. This is monitored on the Midas Webpage.
  • Make sure that when runs are manually started, all the information on the info page is correctly updated

Main monitoring tasks:

In addition to the MIDAS status page you should monitor the experimental equipment.

  • Monitor cryo TPC and CHUPS, it is essential for the safe operation of the experiment.
  • Once per shift fill out the checklist on zurban:/home/l_data/Desktop/Checklists, see desktop:5 on zurban.
  • observe online display (section 2.2 in Manual).
  • check HV and currents of chambers [zurban desktop:1]
  • observe visual scalers
scaler label function
1 proton current Proton accelerator beam current in nA
2 & 3 unused Some are connected but uninteresting
4 Forced trigger Forced trigger start signals for TPC WFDs
5 - 7 unused Some are connected but uninteresting
8 muSCa Veto halo counter used to collimate after the muSC
9 muSC "mu" Hits above the threshold for muons in muSC
10 muSC "e" muSC above electron thresh. Note that this is #Muons + #electrons
11 DAQ deadtime Fraction of time spend not taking data
12 1kHz counter Counts from 0 to 10000 at 1kHz. Use this to normalize the other scalers

  • observe separator HV, [zurban desktop: 3].
  • Logbook entries:
    • Report
      • significant changes and observations (make extra new elog entry)
      • at the end of a shift, the shift leader has to write a brief summary, e.g. shift goals, good runs and special
        shift events. (Category General / Type Shift Summary)
    • The shift run summary is on http://cheetah/musun/ by clicking on the runnumber a specific run can be edited.
      • Flag the run quality as "bad" if there is reason to believe the run is bad.
      • Add any special short comment in the comment box.
      • update the information (reload the browser window to see the updated info)

Usual procedures:

  • Setting changing beam polarity
    • General instructions are in section 5.7 of
    • For up-to-date instructions search the elog. As of 11/6/2010 the latest is [[http://www.npl.illinois.edu/elog/musun/run3/596]elog:596]]
  • Moving chambers:
    • Turn off HV, coordinate with chamber experts
  • Area access (Michael)

Usual trouble procedures:

  • DAQ troubles(see section 4 of Manual
  • Beam troubles
    • see section 3 of Manual).
    • Recently, SEP was unstable, readjust by hand (elog:626)
  • ePC troubles
    • in case of major issues and ramping call Michael, Peter (see elog:1 for tel)
    • see section of 5.10.41 in Manual.
  • Other troubles
    • Often a search in the run elog might find a similar situation with advice.

Emergency procedures (Michael update and reference to relevant elog, PeterW please check).

  • Cryo or Chups alarm or serious disturbance: call Marat 4667, 4930, +7-921-326-60-40.
  • Chamber or hydrogen gas alarm
    • Procedure
    • Call Michael() or Peter ()
  • Description of safety interlock system
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Topic revision: r4 - 2010-11-07 - PeterKammel
 
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