• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name markowitz

    Log entry time 08:36:07 on April26,2004

    Entry number 119385

    keyword=shift summary

    started shift in midst of change from 12C to 9Be (160 mg, "thick" target foil). Had to reboot target IOC to move, and then still had to set position by typing in move to # as the button for the beryllium did nothing.

    Table of data runs


    Time: Run:
    00:14-00:29 2778, 20 uA on Be to check spot, rates. Rates low. 68K.
    00:37-01:04 2779, 100 uA, Be, RICH HV tripped off at 750K, reset, 1M
    01:05-01:33 2780 1M
    01:34-02:03 2781 rich tripped off, reset, 1M
    02:07-02:36 2782 rich tripped off, reset, 1M
    02:37-03:07 2783 1M
    03:07-03:36 2784 1M
    03:37-04:05 2785 1M
    04:05-04:35 2786 1M
    04:36-05:06 2787 1M
    05:09-05:37 2788 1M RICH tripped, reset
    05:38-06:06 2789 1M
    06:07-06:39 2790 1M RICH tripped, reset
    06:39-07:08 2791 1M
    07:08-07:36 2792 1M
    07:36-08:18 2793 1M



    00:30 raise current to 100 uA, change prescales to 5000/200/3000/200/1/200/1


    04:20 put in OTR. Seems stable, but I had to set the "Acquire Gain" to 0.4 in order to avoid saturaitng max pix. OTR gives rms widths of 160 by 280 (x and y respectively) while SLI gives 170 by 85 (x and y wdiths respectively). I believe OTR is rms (the GUI says so) and that SLI is sigma (according to folklore). Interesting that the two claim aspect ratios of 1x2 and 2x1.