[Hallc_running] [Revised Logentry] Hall C, RC Report, Wednesday June 24, 2025

[hdbhatt at jlab.org]

Logentry Text:
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During the day shift yesterday, the accelerator was down for about 2.5 hrs, and data was collected for 4.26 hours. The beam remained stable throughout the swing shift, allowing for 6.67 hours of data collection. However, starting at 4:45 AM this morning during the owl shift, the accelerator went down due to a loss of chilled water, with 3.64 hours of data collected before the interruption.

Total data collected (ABU) during last 24 hrs is about 15.4 hrs.

There were 2 minor issues of coda crash during last 24 hrs and were reset. https://logbooks.jlab.org/entry/4404250, https://logbooks.jlab.org/entry/4403913

Tomorrow, Wednesday starting 7 am, there will be Beam Studies and RF recovery. Beam downtime is expected to be short.


===================
Run Plan for a few days starting today:
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In order to take data on LH2 target, we need to empty the existing LD2 target and fill in LH2.
Dave Meekins will start the target work soon.

    Tuesday, June 24 (morning, ~10:00 AM):
        Controlled Access
        Empty LD2 target (Dave Meekins)
        We will take data on Carbon single foil while waiting on the empty target (Beam Current 0.5 uA)
        We will take empty target data overnight (until Wednesday morning) with Beam current: up to 2 µA

    Wednesday, June 25 (morning):
        Hall to Controlled Access
        Switch from deuterium to hydrogen loop (~8 hours)
        Condense target
        We will start taking LH2 data (~2 shifts)

    Thursday, June 26 (tentative, depending on LH2 data collected):
        Move SHMS to 13.5°
        Move HMS to 13.5°
        We will take hydrogen and/or empty target data (~8 hours)

We will have an in-person meeting today at CH conference room and via zoom.
Zoom Info and online information: https://hallcweb.jlab.org/wiki/index.php?title=June_24,_2025


Many Thanks to our shift takers for their hard work. We still need many shift crews starting Friday Owl Shift. Please consider signing up if you are available.
Shift Sign Up link:  https://misportal.jlab.org/mis/physics/shiftSchedule/index.cfm?experimentRunId=HALLC-LAD

==============================

Day Shift Summary Today: https://logbooks.jlab.org/entry/4404552

Day Shift, June 23
Summary: https://logbooks.jlab.org/entry/4403878
Checklist: https://logbooks.jlab.org/entry/4404101
BTA: https://logbooks.jlab.org/entry/4404117
Target Status: https://logbooks.jlab.org/entry/4404029


Swing Shift, June 23
Summary: https://logbooks.jlab.org/entry/4404130
Checklist: https://logbooks.jlab.org/entry/4404228
BTA: https://logbooks.jlab.org/entry/4404323
Target Status: https://logbooks.jlab.org/entry/4404140
Magnet Screenshots: https://logbooks.jlab.org/entry/4404207

Owl Shift, June 24
Summary: https://logbooks.jlab.org/entry/4404351
Checklist: https://logbooks.jlab.org/entry/4404532
BTA: https://logbooks.jlab.org/entry/4404524
Target Status: https://logbooks.jlab.org/entry/4404332
Magnet Screenshots: https://logbooks.jlab.org/entry/4404528

Strip Charts: https://logbooks.jlab.org/entry/4404571

=======================================
RC Report: June 18, 2025: https://logbooks.jlab.org/entry/4400382
RC Report: June 19, 2025: https://logbooks.jlab.org/entry/4401192
RC Report: June 20, 2025: https://logbooks.jlab.org/entry/4401859
RC Report: June 21, 2025: https://logbooks.jlab.org/entry/4402574
RC Report: June 22, 2025: https://logbooks.jlab.org/entry/4403272
RC Report: June 23, 2025: https://logbooks.jlab.org/entry/4403949

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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/4404603
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