[Hallc_running] [Revised Logentry] RC Daily Update Oct/29/2023, and RC meeting at 11 am

[billlee at jlab.org]

Logentry Text:
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Since the last update, we have been in the production phase with a reduced threshold (from 750 to 650). A few trigger tests were completed with the coin_sparse_low configuration, and the initial look is good for operating at a lower threshold and higher current. Feedback from MCC: Hall A at 45uA and Hall C at 35uA will cause issues. Hall A from this point on will be down for a while, we should think about profiting from running at a higher current. 

In terms of data collection, it was an 80% day. 1084 mC of integrated charge collected. Crystals in the column 4 are seeing further degradation.
Halfwave plated was taken out at 9:20 am today. We will continue production. 

Near future plan:
We will perform a corrector coil beam steering test for the next angle setting with a non-zero corrector coil field.
Wednesday, November 2, during the beam study, 7:00 beam stops, 7:30 a.m.: sweep the hall open for maintenance; Hall will enter restricted access at 8:00-8:15 a.m, and sweep close the hall at 16:00. 
We will attempt the following maintenance items:
        - NPS students will remove all PMTs + bases from the column. Hall tech support is needed for this part.
        - Two new bases with the low voltage regulator bypassed (verified) will be swapped into the NPS.
        - NPS shielding installation if ready
        - Heidi is looking into adding an additional bandit to ensure SHMS dipole stability.
        - Chandan and Dave Mac will access and check the HMS hodoscope patch panel. to address this issue: https://logbooks.jlab.org/entry/4210267
        - Aaron will push new code for the NPS chiller controller.

Zoom link for the RC meeting: https://jlab-org.zoomgov.com/j/1617015555?pwd=L09IQ216dml6ZmM5ODExVjFsMXdsUT09#success

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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/4212480
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