Aggregator

Log Number: 4501989Logbook(s): 

• ELOG
• LERFLOG

Body: The following entry was placed in the Accelerator Bypassed-Interlocks Log (ABIL) Device: OM219 Function: Oxygen Monitor Location: LERF User Lab #6 Purpose: Sensor failure leads to an alarm Exp.

Log Number: 4501988Logbook(s): 

• HDLOG
• ELOG

Tags: 

• HarpScan
• Beamline

Body: 

Harp scan

Log Number: 4501987Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget: Loop 2 10cmPass: 3Note: Calibrated On:2026-May-18 22:28Calibrated By: shrinerFile:C-2026-05-18_2228_Loop_2_10cm_Pass-3.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)Dump Left24,1

Log Number: 4501986Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4501985Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4501984Logbook(s): 

• HDLOG
• ELOG

Tags: 

• HarpScan
• Beamline

Body: 

Vertical profile still looks non-gaussian. And the U-width is much wider than we used to have a couple of weeks ago.

Log Number: 4501978Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

Things were running smooth for about 15-20 minutes but all of a sudden we started getting immediate halo trips. So we paused beam to Hall B and sent to C and D and found that the 1A beam spot was very oblong. I paused the phase lock and adjusted the NL gang phase by hand which brought IDX rates down across the machine. So then we attempted to send back to B and we were still seeing almost immediate halo trips. It looks like the hall target lock steered to bleed through from the other halls while we were troubleshooting.

Log Number: 4501977Logbook(s): 

• HDLOG
• ELOG

Tags: 

• HarpScan
• Beamline

Body: 

The vertical beam profile looks strange. It is much wider than it used to be and it seems to have a dip somewhere in the middle.
I asked our shift leader to run another scn to verify that this is real.

Log Number: 4501975Logbook(s): 

• ELOG

Body: 

This morning the contractor finished up welding and painting the final tabs on the new piping supports. Work on this task is now complete. New supports have completely eliminated the piping movement that was a contributor to the prior failures we experienced at this tower. Photos of the new supports have been added as attachments.

Log Number: 4501973Logbook(s): 

• ELOG

Body: 

Log Number: 4501971Logbook(s): 

• ELOG

Body: 

AFAIK we don't have penetration "owners". In the linacs above CMs, based on upstairs component layout, pseudo-owners sort of emerge out of convenience. In the BSY, it's wherever space is available. So, good to go using 4082.

Log Number: 4501969Logbook(s): 

• HDLOG
• ELOG

Entry Makers: dthomasBody: 

Log Number: 4501966Logbook(s): 

• HDLOG
• ELOG

Entry Makers: dthomasBody: 

Log Number: 4501965Logbook(s): 

• ELOG

Body: 

Log Number: 4501963Logbook(s): 

• ELOG

Body: 

Correction we don't know who the cable tube in 4082 belongs to

Log Number: 4501958Logbook(s): 

• ELOG
• INCLOG

Body: 

Time estimate was worst case. Should be able to complete task in 4 hours.

6/1 is an acceptable start date

As far as penetrations. No penetrations need to be emptied. Our intentions are to use penetration 4082 in the BSYSB. It has a cable tube with space available with poly beads. Do know who owns the tube.

Log Number: 4501948Logbook(s): 

• ELOG
• INCLOG

Body: 

IHA5C11 - stepper motor driver module replaced (https://logbooks.jlab.org/entry/4501946)

Log Number: 4501946Logbook(s): 

• ELOG
• INCLOG

Entry Makers: sethgdelacruzBody: 

IHA5C11 - harp scan command would not respond, performed an ioc reboot but the harp still did not respond, replaced the stepper motor driver module for channel 1, had OPS cycle harp and verified the harp carriage physically moved from the "OUT" position to the "IN" position and verified the encoder read backs.

Log Number: 4501944Logbook(s): 

• HDLOG
• ELOG

Entry Makers: dthomasBody: 

Log Number: 4501943Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: JD70-107 55um 45/135 degPass: 5.5Note: Calibrated On:2026-May-03 18:47Calibrated By: alexsFile:D-2026-05-03_1847_JD70-107_55um_45_135_deg_Pass-5.5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)