[Sbs] Fwd: [New Logentry] RC Update and plan for swing and owl

[Paul King]

RC Update and plan for swing and owl<https://logbooks.jlab.org/entry/3926253>

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Lognumber 3926253<https://logbooks.jlab.org/entry/3926253>. Submitted by pking<https://logbooks.jlab.org/user/pking> on Sat, 10/16/2021 - 19:52<https://logbooks.jlab.org/entries?start_date=1634424740&end_date=1634431940&book=HALOG>.

Logbooks:       HALOG<https://logbooks.jlab.org/book/halog>

Since this morning, we have completed our series of runs on LH2 at different beam currents with SBS set to 100% field. The list of runs is at the bottom of the message.

At about 17:00, we changed the SBS setting to 50% (https://logbooks.jlab.org/entry/3926154, https://logbooks.jlab.org/entry/3926172, and https://logbooks.jlab.org/entry/3926189). We changed our beam position from Y=0.9 to Y=0.7 to be centered on the 2mm hole target; this was reversing about half of the change needed to go from zero field to full field (https://logbooks.jlab.org/entry/3926196).

We then put the LD2 target into beam, and OPS performed the ion chamber calibration for it.

We are currently taking an hour of data on the LD2 target with a beam current of 2.5uA. After this we will switch back to LH2 with 5uA of beam current.

***  I plan to have an RC meeting tomorrow at 3:15pm to discuss our final two shifts using 1-pass beam.  ***


Plan for tonight through tomorrow morning
================================
Runs should be about an hour long; you can use the whiteboard to keep track of how much time we have on each target.
1) Take 4 hours of data on the LH2 target with 5 uA of beam current.
2) Take 2 hours of data on the LD2 target with 2.5uA of beam current
3) Continue to repeat steps (1), (2), and (3).


Run list for the beam current scans with SBS at 100% field
============================================
Run 11207: LH2, 1uA beam current, BBCal threshold -250mV, PS1==1, PS2==2

Run 11208: LH2, 2uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off
Run 11212: LH2, 2uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off
Run 11214: LH2, 2uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off

Run 11215: LH2, 3uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off

Run 11216: LH2, 3uA beam current, BBCal threshold -262mV, PS1==1, others off
Run 11218: LH2, 3uA beam current, BBCal threshold -262mV, PS1==1, others off
Run 11219: LH2, 3uA beam current, BBCal threshold -262mV, PS1==1, others off; GMN1_pedestal (no zero suppression)

Run 11224: LH2, 4uA beam current, BBCal threshold -262mV, PS1==1, others off
Run 11226: LH2, 4uA beam current, BBCal threshold -262mV, PS1==1, others off

Run 11228: LH2, 5uA beam current, BBCal threshold -262mV, PS1==1, others off

Run 11229: LH2, 5uA beam current, BBCal threshold -274mV, PS1==1, others off
Run 11230: LH2, 5uA beam current, BBCal threshold -274mV, PS1==1, others off
Run 11235: LH2, 5uA beam current, BBCal threshold -274mV, PS1==1, others off


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