View source for November 7, 2023

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<b> RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting-house meeting room (2nd floor) </b>
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= Useful Links =

* [https://misportal.jlab.org/mis/physics/shiftSchedule/index.cfm?experimentRunId=DVCS-NPS-2023 Shift Signup ('''Read only''')]
** [https://misportal.jlab.org/mis/apps/physics/shiftSchedule/index.cfm?experimentRunId=DVCS-NPS-2023 Shift Signup]

* [https://hallcweb.jlab.org/live_status/snapshots_controls/ Hall-C Controls]
* [https://logbooks.jlab.org/book/hallc Hall-C Logbook]
* [https://cebaf.jlab.org/files/ops/accboard/ MCC White Board]

= Instruction for RCs =
* [https://hallcweb.jlab.org/wiki/index.php/Hall_C_IHWP_Change_Procedure Half-wave plate change]
** Follow the instructions in the link above whenever the HWP is changed flipped.
* There was discussion of a heat and reactivation in the 08:00 meeting on 07/11/23.
** If this happens, will need another Moeller measurement.

= Past 24 hours =

* Moeller measurement, took a bit longer than planned. An access was required, [https://logbooks.jlab.org/entry/4216323 see Dave Gaskell's summary here.]
* Back to production running after the Moeller measurement.

Issues:

* Two odd blocks in calorimeter
** [https://logbooks.jlab.org/entry/4216390 Log entry #1]
** [https://logbooks.jlab.org/entry/4216471 Log entry #2]
** [https://logbooks.jlab.org/entry/4216687 Log entry #3]
** [https://logbooks.jlab.org/entry/4216719 Log entry #4] - This is Wassim's analysis of the issue.
* '''We will potentially have an access this morning to try and address block 497.'''

= RC Summary =

[https://logbooks.jlab.org/entry/4216754 Today's update is here.]

= Current Status =

* Running production on KinC_x50_4' after.
* Access to investigate block 497.

= Near Future Plan = 

In the near term future:
* Keep running the current setting.
* Wednesday Owl, beam studies from 05:00-07:45
** We will do a cosmics run of ~2 hours with the sweeper on followed by another ~2 hour run with the sweeper off.
* On Wednesday, we will have ~8 hours or so to access the Hall during the maintenance downtime. Planned activities -
** Heidi wants to take a look at the SHMS door after the [https://logbooks.jlab.org/entry/4213685 issue on Wednesday.]
** [https://logbooks.jlab.org/entry/4215956 Noisy block in Column 8, Row 22] - Take a look at if it still looks odd.
** Wait to see if amplifiers will survive before replacing more bases.
** Remove more bases - take another column out.
*** One column takes ~1-2 hours (to remove).
*** May have time to remove 2?
** Measure B field at location of bases?
*** Gain vs x dependence.
*** Does sweep magnet have to be off to get near the NPS?
*** Any measurement has to be done with magnets on and before NPS moved to have any point.
* Asked MCC for a restricted access ASAP on Wednesday.
** Radcon has us in the queue, the NL, SL and injector are all going to controlled so will have priority.
** My suspicion is that we'll be swept around 09:00 with access possible 09:30-10:00.

= Special Studies =

* Cosmics with sweeper on vs off - Owl Wednesday
* Elastics on Thursday (09/11/23) or Friday (10/11/23) next week?

= Standing Issues =

* Block 497 - problematic.
* Implementing checks for charge asymmetry in alarm handler and online analysis: https://logbooks.jlab.org/entry/4213566

= Planned Accesses to the Hall Today=
* Possible access to investigate block 497.
** Escorted.

= Planned Accelerator Configuration Changes =
* Pass change on the 13th of November (13/11/23).

= Special Requests =
* Stable beam and mercy from the DAQ gods to continue.