[Halla_running] [Revised Logentry] RC run plan for 15 October - 16 October

pking at jlab.org pking at jlab.org
Sat Oct 15 16:00:03 EDT 2022


Logentry Text:
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Run plan for 15OCT swing shift through 16OCT day shift.  {As updated at 15:58 on 15 October}

1)  Harp scans at 1H01, 1H04A, 1H04B to check beam spot size
2)  Move to the carbon hole target.  Take a series of four runs at 2uA centered at ~1.25mm from nominal center in each of +/-X and +/-Y to see the carbon hole move and verify centering.  Take a run at the nominal center location.
3)  Turn raster off.  Start a CODA run (and parity run) on target out with 5uA, and then do a bullseye scan.  Start at our nominal center (X=0.0, Y=-0.5), and go to (+2.0, -2.5), (+2.0, +1.5), (-2.0, +1.5), (-2.0, -2.5), then return to (0.0, -0.5).  End the runs.
4)  Take target out.
5)  Turn on SBS to 100%.  OPS will need to set the correctors and check steering on the dump.  Adjust the target field direction.  Change the BBCal HV as described in https://logbooks.jlab.org/entry/4058589
6)  Move to the carbon hole target.  Take a 5uA run at the nominal center location to verify centering hasn't shifted.
7)  Move to carbon optics target at nominal center, take a 5uA run to  check raster uniformity
8)  Go to target out, and try to ramp the beam current up as high as it can go with reasonable trip rates.  We would like to reach a maximum of 30uA.
9)  Do a BCM calibration with target out
10)  Take a run on the evacuated reference cell to check scraping at 10uA and one at 20uA.
11)  Go to the He-3 cell. Step the current up "slowly" to a maximum of 20uA. Take data.  When we start taking data on the He-3 cell, call the GEM expert and switch to the GEnII-3Stream run type.

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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/4059720
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