HOW TOs

PREX Main<< Information for Shift Takers << Shift Leader

Overview of Shift Tasks

• Ask the expert (back room) if something is unclear.
• Start / stop runs using the Parity DAQ (apar@adaq1). Keep runs <430 K events or ~0.5 hour at 240 Hz.
• Verify that Charge Asymmetry feedback is running. The data are practically useless if not.
• Verify that Beam Modulation is running
• Look at the Panguin ("online analyzer") plots
• Analyze ("fast prompt") each run and review the prompt plots.
• (new, Aug 19) Run the Compton DAQ
• (new, Feb 28) Run the Compton Counting Mode DAQ

Taking Data

• Starting CODA
  • CODA problems and FAQ
• Starting a Run
• Starting the Compton CODA
• Starting, Ending & Analyzing a Compton Run
• Starting the Compton Counting Mode DAQ
• Taking a run
• Online analysis How-To
• HRS_DAQ
• Podd Analysis for Q2, Optics
• Take a spot++ run (High current or low current)
• How to go to cavity lock with low current - this is NOT required for CREX
• Doing a calibration run
• Taking MAIN detector Counting Run (Alignment Check)

PREX Collimator (Septum Temperatures)

• Reset collimator temp IOC

Magnets

• Set HRS magnets
• Set Septum magnets
• Magnet Controls Down
• Checking and Controlling Drifts

Target

• TargetOperation
• How to Find the 90-Degree C-Hole
• How to establish beam on a lead target
• Thermally break-in the target in case of long beam down

Detectors

• Trouble-shooting the High Voltage GUI
• Checking the GEM Gas panel
• Checking the HV
• Check-list For taking Counting runs and Going back to Production

Fast Feedback

• If FFB broken badly, execute Plan B. FFB_troubleshooting

Reporting

• HALOG - howto
• HAPLOG
• BTA how-to
• Shift Checklist

Parity

• Parity Aq feedback
  • Parity feedback HOW-TO
• Flipping Insertable Half Wave Plate (IHWP) state
  • Flipper
• Doing a PITA scan
  • PITA scan HOWTO
• History - CREX

Monitoring

• Alarm Handler
• Scalar GUI
• Wall screen
• Panguin
• Responding to Alarms
• HallA Tools
• Strip chart
• Check the raster
• Monitoring the Compton Rates

Beam Modulation

• How to run
• Check online plot and trouble shooting

Re-initializing

• Computers
  • EPICS (hacweb7)
  • poltar
  • adaq2
  • adaq1
• Detectors
• Magnets
• Recovering from Power Outage
• OLD Coming back from no beam
• NEW Establishing High Current on a Calcium Target
• Parity DAQ
• Remote power strips
  • counting mode DAQ
• rebooting IOCs

Polarization

• Moller Pre-requisite Procedure
• Moller Procedure
• Compton Polarimeter, DAQ How-tos

Fall 2016 HOWTO

• Info about how to run the DAQ, analyze data, etc: Fall 2016 HOWTO

Expert Tools

Setting up Postpan

Setting up japan

Running prompt

Performing Dithering Corrections

Pictures needed