TOFp System Procedure:
TOFp High Voltage On or Off


   Description:
This is the procedure how to turn on or off the High Voltage applied in the TOFp tray. There are 41 slat assemblies inside the tray. Their HV is provided by the "HVSys" System, which is a custom system for TOFp and hence uses custom software for control and monitoring.
   Related Documentation:
  1. TOFp Glossary
  2. HVSys Users Manual
   Requirements:
  1. Approval of TOFp Group.
  2. Access to STAR Control Room.
  3. STAR Shift Crew Training.
  4. Approval of Shift Leader.
   Procedure:
  1. Sit in front of the TOFp Control PC, and open a terminal window. Then ssh to the machine tofpdaq.star (the password is posted at the TOFp Station in the control room).
  2. Check whether the monitoring program is running. Enter: 
    hvmon status
     if it is running, stop the monitoring program by entering: 
    hvmon stop


    3. TOFp HV OFF

  3. To turn TOFp HV off, enter:

    4. tofhv_OFF


    TOFp HV ON

  4. To turn TOFp HV on, enter:
    5. tofhv_ON
  5. Then restart the monitoring program by entering 
    hvmon start
  6. Wait 45 seconds and then check the status of the monitoring program by entering 
    hvmon status
  7. Restart the Alarm program. Either open up a session on tofp.starp.bnl.gov and issue the command: 
    tofhv-Alarm
     or point and click "HVsys Alarm" from the panel menu of the tofp.starp.bnl.gov screen (preferably in the "TOFp HV" virtual screen).
  8. Send an email to tofp@physics.rice.edu to alert the TOFp Experts.
   Testing:
   Completion:
  1. Contact TOFp Control with any end-of-procedure comments that are necessary. Was this procedure successful? Is this documenation understandable and complete?