• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name R. Michaels

    Log entry time 07:27:11 on September27,2005

    Entry number 156202

    keyword=Q2 scanner alignment

    Now we work on aligment of the Q2 profile scanner.
    We had done this July 21 (halog 148806) with mixed resuls.

    Ask for 1 uA. Turn on scanner scint HV to 1900V. Turn off S2m
    HV because T7 & T8 rate was huge. All PS adjusted to get 1 Hz
    except T5 & T6 which are resp. 26 and 20 Hz for initial scanner
    location X=18, Y=30. This is what UMass calls X & Y which I think
    is opposite to VDC notation.

    Run .... X ... Y .... T5 .... T6
    ......... cm ............ Hz

    2783 ... 18 ... 30 ... 27 .... 20
    2784 ... 23 ... 30 ... 11 .... 4
    2785 ... 18 ... 35 ... 5 ..... 3
    2786 ... 18 ... 25 ... 40 .... 360
    2787 ... 18 ... 20 ... 49 .... 179
    At first I thought T5 was high so I had adjusted PS5, but
    that was wrong. Repeat the above.
    2788 ... same
    2789 ... 17 ... 20 ... 31 .... zero (T6 seems to have died)
    2790 same as 2789. Actually didn't fix my PS5 problem until now.
    2791 ... 15 ... 30 ... 20 .... zero

    Looking at data with a typical macro like "prof.C" I did see
    a spot move around in VDC between one run and another, but
    T6 died at some point which will limit that HRS.

    Next we switch back to HAPPEX DAQ for production.