Aggregator

Log Number: 4477170Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: ORFP in progress (1A horizontal dispersion)

Log Number: 4477169Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 0 0 8

Log Number: 4477168Logbook(s): 

• BTLOG
• ELOG

Entry Makers: dturnerBody: 

1500: Arrived at MCC . Ops ready to start correcting H.Dispersion out
of Arc1, but 1L21 wasn't responding to the 30Hz function generator
kicks as expected (30Hz BPM spikes flopping between positive and
negative). Jay B. suggested lowering ODVH in some of the 1L21
cavities, reLEMming, and trying again.
https://logbooks.jlab.org/entry/4477120

30Hz still didn't work correctly with 1L21, so we put an offset into
one cavity in 1L20 and use the relative BPMs for correct H.dispersion
out of Arc1.

Log Number: 4477167Logbook(s): 

• ELOG
• BTLOG

Body: IHA1E01 Y-plane Emittance Measurement Analysis - K1 range far from correct - generated a new template
qsUtility Data Analyzer V7-34
SDDS FILE: /a/opsdata/fiefdata/fileio/q/qsUtility/data/D1-0/IHA1E01/IHA1E01_y_zigzag_2026-03-15_22:15:56/IHA1E01_zigzag_2026-03-15_22:15:56_qsUtility_analyzer.sdds
HOSTNAME: opsnx93 CED WORKSPACE: OPS CED LOGIN KEY: pro

Log Number: 4477166Logbook(s): 

• ELOG
• BTLOG

Body: IHA1E01 X-plane Emittance Measurement Analysis - discarded for being ugly
qsUtility Data Analyzer V7-34
SDDS FILE: /a/opsdata/fiefdata/fileio/q/qsUtility/data/D1-0/IHA1E01/IHA1E01_x_zigzag_2026-03-15_21:55:30/IHA1E01_zigzag_2026-03-15_21:55:30_qsUtility_analyzer.sdds
HOSTNAME: opsnx93 CED WORKSPACE: OPS CED LOGIN KEY: pro

Log Number: 4477165Logbook(s): 

• ELOG
• BTLOG

Body: IHA1E01 X-plane Emittance Measurement Analysis
qsUtility Data Analyzer V7-34
SDDS FILE: /cs/prohome/apps/q/qsUtility/7-34/fileio/data/IHA1E01/IHA1E01_x_zigzag_2026-03-15_21:19:52/IHA1E01_zigzag_2026-03-15_21:19:52_qsUtility_analyzer.sdds
HOSTNAME: opsl02 CED WORKSPACE: OPS CED LOGIN KEY: pro

Log Number: 4477162Logbook(s): 

• ELOG
• BTLOG

Body: Emittance Measurement: IHA1E01 X-plane - ABORTED
qsUtility zigzag_dataColletor V7-34
HOSTNAME: opsl02 CED WORKSPACE: OPS CED LOGIN KEY: pro

Log Number: 4477161Logbook(s): 

• ELOG

Entry Makers: bschaumlBody: 

Log Number: 4477160Logbook(s): 

• ELOG

Entry Makers: bschaumlBody: 

Screengrabs should be self evident

Log Number: 4477159Logbook(s): 

• ELOG
• BTLOG

Body: Fopt results from /usr/ntfs/public/optics/diforb/26mar152055
Comment: before betatron match
HOSTNAME: opsl02
CED WORKSPACE: OPS CED LOGIN KEY: pro
MYA DEPLOYMENT: ops
CONFIG PATH: /cs/prohome/apps/q/QTSnyder_QT5/1-2/fileio/config/cs.conf
DIFORB PATH: /usr/ntfs/public/optics/diforb

Log Number: 4477158Logbook(s): 

• ELOG

Body: 

Laser Used:

C Laser

Sigmas:

Peak 1 - x Sigma: 0.2106 Peak 2 - u Sigma: 1.1831 Peak 3 - y Sigma: 1.3281

Log Number: 4477157Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Fopt 7.9 completed successfully. The runtime settings include a sample count of 15, a minimum current of 4, and an operating regime of Standard with Excitation in 1S Region. The corrector and RF kicks applied were 0.488207 and 0.488207 volts respectively. The max. amplitude setting was 1 millimeters. The files for this run were saved in the directory /cs/opshome/hlapps/optics/diforb/26mar152055. The X and Y stability of the machine during the run was 0.0422463 and 0.0288063 (mm) respectively.

Log Number: 4477155Logbook(s): 

• ELOG

Entry Makers: bschaumlBody: 

When bypassing multiple cavities it would be more expedient to move all tuners at once. Bypassing a whole zone (1L09) took about an hour. A workaround is running many instances of the cavity history tool or bypassing cavities manually, but this seems like an essential change at the moment.

Log Number: 4477154Logbook(s): 

• ELOG

Entry Makers: yoonBody: 

Fig 2: 2A peak signal deviates less than 0.2
Fig 3: 1A peak signal deviates less than 0.2

Log Number: 4477153Logbook(s): 

• ELOG

Entry Makers: yoonBody: 

Fig 1: 1A after IPM1A21 amp set to ~7.5mm
Fig 2: 2L after
Fig 3: 2A after
Fig 4: 3L after
Fig 5: VDC set to -1.2

Log Number: 4477152Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16514Title:
1L09 Dropped HV

Summary:
1L09 dropped HV and CPS breaker was found tripped.

Log Number: 4477151Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

ORFP has been underway since day shift. We have completed Arc 1 & 2 horizontal dispersion corrections and Arc 1 & 2 M5,6 corrections. It has been going fairly smoothly. We are unable to get the 30 Hz beam modulation to properly sync with the beam so we have resorted to correcting dispersion using static (DC) offset kicks.

About 18:00 were starting the second iteration of dispersion/M5,6 when we tripped a CPS breaker in 1L09. Given the abundance of gradient headroom, we decided to forgo calling in RF support in favor of just bypassing the zone and putting the repair off until Monday.

Log Number: 4477150Logbook(s): 

• ELOG

Body: 

HYST AREA Version 7-0 has successfully cycled the following:

Area.Linacs.North

Total Time: 1.233 mins

Log Number: 4477149Logbook(s): 

• ELOG
• CLOG

Tags: 

• Autolog

Body: LEM 9.19 was successfully run for the North Linac on 2026-03-15 19:16:08. The application phase took 00:00:08 to complete.

Log Number: 4477148Logbook(s): 

• ELOG
• CLOG

Tags: 

• Autolog

Body: LEM 9.19 was successfully run for the North Linac on 2026-03-15 19:15:44. The application phase took 00:00:18 to complete.