Feed aggregator

Log Number: 4230316Logbook(s): 

• HCLOG
• POLOG
• ELOG

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.

Log Number: 4230313Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06
Data from: /usr/opdata/burt/allsnap/12-05-23_11:01:18
Restored file: /tmp/12-05-23_18:16:22.snap

Log Number: 4230312Logbook(s): 

• ELOG

Tags: 

• Autolog

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.

Log Number: 4230311Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Destination Masking to: Injector
User: eforman

Log Number: 4230310Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause12354Title:
Stopping beam to change injector setup

Summary:
Stopping beam to change injector setup. Hall C cancelled Moller measurement for tonight.

Log Number: 4230307Logbook(s): 

• ELOG

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.

Log Number: 4230303Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4230298Logbook(s): 

• ELOG

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

Log Number: 4230299Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4230295Logbook(s): 

• HBLOG
• ELOG

Body: 

5 nA, tager harp scan after MCC improved something

Log Number: 4230294Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4230293Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

Log Number: 4230291Logbook(s): 

• HBLOG
• ELOG

Body: 

5 nA, harp tagger scan after horizontal beam squeezing, X looks better, 45 looks worse.

Log Number: 4230288Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl05

Saved: eforman 12-05-23 17:22:31 {A:3 B:5 C:4 E:1047 A=BS B=CW C=BS D=BS 0R08=0.00 A dump(s) in.

Log Number: 4230286Logbook(s): 

• ELOG

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

Log Number: 4230287Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4230285Logbook(s): 

• HBLOG
• ELOG

Body: 

5 nA, very wide X, 45 profile fits for tagger harp scans

Log Number: 4230284Logbook(s): 

• ELOG

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.

Log Number: 4230282Logbook(s): 

• POLOG
• ELOG

Entry Makers: mamunBody: 

Gun vacuum and DecaRad counts are stable and unchanged from ramp down/up activity in 7:09 am and 8:47 am.

Log Number: 4230278Logbook(s): 

• HBLOG
• ELOG

Body: 

5 nA, 2c21 harp sacan looks resonable