• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name jpchen

    Log entry time 11:22:00 on April 6,2010

    Entry number 316659

    keyword=scattering chamber vacuum still bad

    The scateering chamber vacuum stayyed high (a few x10-3). I went to the hall to check: the high vacuum gauge reads 8-9x10-3, low vacuum gauge reads 450 mTorr (N2) initially and 553 mTorr when I left the hall (912 mTorr for Ar). All the valves for pumps are still open, Pumps on. Valve to beamline has been closed for the last 3 hours.




    FIGURE 1