• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name A. Camsonne

    Log entry time 08:06:44 on April 11, 2007

    Entry number 198606

    keyword=Owl shift summary 04/11/2007

    Owl shift summary April 11th 2007
    TO : E. Khrosinkova

    Kinematic : Q2 = 55 fm -2 production He3


    0:00 Shift starts no beam for now

    0:36 Beam in hall 70 uA
    MCC asks how high we want to go in current.
    I asked to get at least 85 uA or higher since the target set points
    should allow to get more power on the target.
    If it is too difficult we will take what they can deliver.

    01:15 MCC called they can deliver only up to 75 uA so we will take this
    current and they will troubleshoot the injector tomorrow.

    Asked for 5 uA no raster for harp scan

    Sigma x = 54 microns
    Sigma y = 242 microns

    asked to reduce sigma Y before using the beam

    2:20 Good beam profile less than 200 um in X and Y ( Harp 2341 )
    Moving to BeO target to check raster

    2:30 Target in place asking for 5 uA no raster
    tuning beam position to (-2.25,0) on BPMB

    2:57 Beam at right position Run 2342 2343 ( maybe same file )
    Spot run 2300 looks good


    3:02 Asked for raster on : 5x4 mm for raster calibration
    size obtained is about 3.5x1.5

    3:18 Asked for 2.5x4mm but height is horizontal and Width is vertical (!)

    3:25 5x2 MCC seems to give the wanted 1.5mmx1.5mm
    Moving to carbon with hole to check for centering

    3:53 High current run on carbon target with 3x3 mm raster
    beam looks to high on plot but
    found that the raster plot is inverted vertically so
    beam was too low

    4:18 Asked for position (-2.25,1) gives pretty good centering

    4:24 Target moved to He3 with raster set to 1.5x1.5 for production

    4:32 Start of production data asked for 75 ua but had to go down to 70 uA
    for better stability, higher current will be worked out in the day.


    Run list
    Harp scans 2335-2339
    2:20 Harp scans 2341

    Spot++ runs
    2300 no raster (-2.25,0)
    2301 5x4 raster give 4x1.5
    2302 2.5x4 gives 4x0.7
    2303-2304 %x2 gives 1.5x1.5

    Carbon hole runs
    2307 (-2.25,0)
    2309 (-2.25,-0.2)
    2310 (-2.25,0.8)
    2311 (-2.25,1)

    Production Q2=55

    2312 He3 1M 0.0723764
    2313 He3 1.4M
    2313 He3 1.4M
    2313 He3 1.4M
    2313 He3 1.4M

    Run
    2312 254210 904546 1.04573e+07 1.01089e+08 7.49143e+08
    0.0723764 1M
    2313 183477 652857 7.54757e+06 1.0159e+08 7.47955e+08 0.100279 1.4M
    2314 185930 661587 7.6485e+06 1.01934e+08 7.47301e+08 0.0989556 1.4M
    2315 186144 662347 7.65728e+06 1.02425e+08 7.48224e+08 0.0988421
    1.4M
    2316 187801 668246 7.72548e+06 1.02791e+08 7.48234e+08 0.0979696
    1.4M
    2317 188861 672017 7.76907e+06 1.03038e+08 7.49913e+08 0.0974198
    1.4M
    2318 188239 669803 7.74348e+06 1.02267e+08 7.47819e+08 0.0977418
    1.4M
    2319 188571 670983 7.75712e+06 1.02903e+08 7.47729e+08 0.0975699
    1.4M
    -----------------------------------------------------------------------------------------

    0.76 C 10.8M triggers