[Halla_running] [New Logentry] Hall A update and RC meeting

[sanghwa at jlab.org]

Logentry Text:
--
Last night, we tried to finish the Ion chamber calibrations for the Reference cell. Reference cell was filled with N2 at 22 psi which would give a similar rate to the production He3 cell. The calibration has been done up to 25uA so far (supposed to be done up to 30uA).
There has been discussion about the location of the upstream copper colimator w.r.t. the target cells and whether we have enough room to deliver the beam. MCC will use a tune beam to scan the collimator position.

After the laser work during the access yesterday, we monitored the target performance overnight. During the owl shift, we lost the polarization (~19% from the last measurement). The target experts will assess the issue and provide more information later.

There is data taken with reference cell, so subsystem experts should check the status of their detector.

Our plan is to complete the ICs calibraiton, and go to the production if target is in good state.
We are also in discussion of the potential moller measurement if we can't take the production data. I will discuss with spokespeople and experts and provide the plan if changes are needed.

We have now TO shift filled for this evening (Thanks, Kate), but there are still empty slots in upcoming weeks. SO, please sign up for shift!
https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=SBS-GEn-2022


RC meeting:
We will meet at 3:30pm for the daily RC meeting, at 2nd floor CH conference room. 
Zoom connection: (https://jlab-org.zoomgov.com/j/1616220064 pw: 314159)


---

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/4179564
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halla_running/attachments/20230915/5896132b/attachment.html>