• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name hcf

    Log entry time 16:27:11 on April 9,2003

    Entry number 59002

    This entry is a followup to: 15195

    keyword=sos dc1 draws dark current

    We just noticed that SOS DC1 was drawing current with no beam (since
    this morning!). Beam now came on, and we do see an increase in chamber
    current, which is normal. However, these chambers should NOT draw a
    HV current when there is no beam. See log entries linked to no. 15195
    (August, 1999) for more history.

    For now, I suggest we keep the DC1 HV low enough that no current is
    drawn when beam is off. Gradually, if possible, turn it back up to 1975V.