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Changed the HC IA setting from 61000 to 48150 at 18:13

Recent Log Entries -

Log Number: 4230316Logbook(s): Body: 

Looking at the first production beam currents in parity runs 13732-13733 (15:50-17:50), the Hall C charge asymmetry was leveling off at about -2500 ppm.

At 18:13, after about 23 minutes of run 13734, I changed the Hall C IA setting from 61000 to 48150, which ought to bring the asymmetry close to zero. Unfortunately, this change was just after the beam stopped to reconfigure the machine for high current beam without witness beam (https://logbooks.jlab.org/entry/4230310) so we can't check the new asymmetry yet.

Autolog save

Recent Log Entries -

Log Number: 4230312Logbook(s): Tags: Body: saver ran from opsl06

Saved: hofler 12-05-23 18:16:08 {A:3 B:5 C:4 E:1047 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. Autosave prior to restore.

Hall C changing to LD2 Target

Recent Log Entries -

Log Number: 4230307Logbook(s): Entry Makers: anthonyBody: 

At this time we cannot send high current to the LH2 target in Hall C due to the configuration of the Injector. Hall C decided to shift to the LD2 target and run at lower current.

iCalibrate: Hall C

Recent Log Entries -

Log Number: 4230298Logbook(s): Body: Calibration ParametersHall:CTarget: LD2 10cmPass: 4Note: HMS: 17, SHMS: -29Calibrated On:2023-Nov-17 16:39Calibrated By: mmerzFile:C-2023-11-17_1639_LD2_Pass-4.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton3

iCalibrate: Hall C

Recent Log Entries -

Log Number: 4230286Logbook(s): Body: Calibration ParametersHall:CTarget: LH2 2 10cmPass: 4Note: Calibrated On:2023-Nov-14 05:17Calibrated By: bbarkerFile:C-2023-11-14_0517_LH2_Pass-4.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Compton2,1982

Hall C NPS Sweeper setup

Recent Log Entries -

Log Number: 4230284Logbook(s): Entry Makers: anthonyBody: 

Figure 1: Beam on low dump viewer with NPS Off
Figures 2 & 3: Beam with NPS sweeper at 25% correctors at 0.
Figures 3 & 5: Beam with NPS sweeper at 50% correctors at 0.
Figures 6 & 7: Beam with NPS sweeper at 75% correctors at 0.
Figures 8 & 9: Beam with NPS sweeper at 100% correctors at 0.

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