Information for Shift Takers

Counting house: 6000(*), 5503, 6666 | Run coordinator: 757-270-8916 | MCC: 7047(*), 7046, 7048 | Crew chief: 7045 | Guard house: 8522

Before the start of your shift: read and understand the Safety Documentation for this experiment.

• You must then sign in the Yellow Binder in the Hall C Counting House!

Current Run Plans

• RC daily meetings and daily run plan for Summer 2019
• Run plans for all energies on Redmine
• Experts on call
• Beam Time Accounting quick link
• Shift Checklist quick link

Your Responsibilities

Shift Leader

• Communicate clearly and effectively with shift crews and MCC (7047), and log any status information to the HCLOG
• Follow the run plan and co-ordinate switching to the next experimental configuration with other shift workers and the MCC as required.
• Maintain and update the Shift Summary detailing the events which occur while on shift
  • This is done by starting the summary as a log entry titled "X Shift Summary" where X = Day, Swing, Owl
  • Save & edit the summary after ANY event of interest occurs, including accesses
  • This provides the readers with an up-to-date play by play of the current shift
  • See example: https://logbooks.jlab.org/entry/3402742
• Record the purpose for every single run in the "Run list" binders.
  • Use the new configuration sheets for the first set of runs on any new setting.
  • There are extra copies on the table in the middle of the counting house
• Keep track of beam time accounting
  • More information on how how to work the Beam Time Accounting (BTA) web app

• Consult the daily run plans and communicate with the RC whenever problems happen that cannot be solved by shift workers.

• Maintain data taking quality and an efficient use of beam time.

• Follow the directives in the COO and associated Safety Documentation.

Target Operator

• Watch the target, see Target Info
• Start and stop the DAQ. Ensure the correct PS factors are being used.
  • Consult the run plan for estimated PS factors to be used for a given setting, adjust these up or down as needed
• Assist the shift leader and third person with their duties

Third person

• Make certain that the Hall-C Alarm Handler process is running. See Hall_C_Alarm_Handler.
  • If there are any alarms being ignored or silenced, find out why and enter this in the logbook.
  • Log any alarms when they occur.
• Carry out online analysis of the data, including 50k replays for the HMS and SHMS
  • Compare 50k replay histograms with the sample ones and report to shift leader any unexplained differences. Hclog them.
  • For the Pion Electroproduction experiment analysis instructions see here.
  • For the VCS experiment, analysis instructions can be found here.
• Fill shift checklist once per shift.
  • An older Shift Checklist file, which also includes help for locating items, should be available here.