[Halla_running] [New Logentry] RC update and run plan for 17 October - 18 October

[pking at jlab.org]

Logentry Text:
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We have just started running on the He-3 cell.  The rough polarization is 27%.  

We've been stepping the current up to get a sense of beam stability; we'd been up to 25uA as I posted this.


=== Run plan for overnight into the morning ===

If beam is down due to tuning, move to the "no target" position, and follow this procedure to verify the spot size:  https://sbs.jlab.org/wiki/index.php/HOW_TOs#If_beam_has_been_down_due_to_machine_tuning
After doing the spot size check, you will need to restore the raster before putting the He-3 cell back into the beam; use this procedure:  https://sbs.jlab.org/wiki/index.php/HOW_TOs#How_to_ask_MCC_to_set_the_desired_raster_size_of_6_mm

1)  He-3 runs, at 30uA of beam current.  Use ps1==8, ps3==0, all others -1.  Take two 1-hour runs.
2)  Move the target to the pickup coil position, and the TO should run an NMR sweep to measure the polarization.
3)  Move back to the He-3 cell position, and repeat steps (1), (2), and (3).  We'll decide tomorrow morning about increasing the beam current.

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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/4061744
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