[Hallc_running] [New Logentry] Run Status

jones at jlab.org jones at jlab.org
Tue Jan 21 09:40:03 EST 2020

Logentry Text:
The beam went off at 7am to slowly warm up the North Linac for work on 1L20

Yesterday we had very good beam with 19.2 hours out of 24 hour at 30uA.

The accelerator work should take about 6 hours.

We are going to controlled access. Work will be done on the pulse NMR system
and with laser alignment checks.

If the target polarization is good, we will continue with the   present kinematics with the polarized target.

If the target polarization needs time to increase, we will do the cross section study with 3He reference cell
See https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Large_Angle_.2830-degree.29_Cross_Section_Study_with_3He_Reference_Cell_.285_hours_total_if_good_beam.29
This is about 5 hours of 30uA beam

If the target polarization still needs  time to increase, we will do part of the reference cell empty,N2 and H2 running.
See  https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Large_Angle_.2830-degree.29_Reference_Cell_H2_a
This is about 6 hours of 30uA beam

One note is that Hall B will do a Moller when beam returns. They will do measurements with IHWP=IN and then switch to IHWP=OUT.
THe instructions for what to do with the parity DAQ are printed out in the counting house 
and at log entry https://logbooks.jlab.org/entry/3767296


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/3768039
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