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Optics On-Call Swing Shift Summary

12 hours 30 minutes ago
Log Number: 4477168Logbook(s): 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.

dturner

IHA1E01 Y-plane Emittance Measurement Analysis - K1 range far from correct - generated a new template

12 hours 45 minutes ago
Log Number: 4477167Logbook(s): 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
dturner

IHA1E01 X-plane Emittance Measurement Analysis

13 hours 17 minutes ago
Log Number: 4477165Logbook(s): 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
yoon

Fopt 26mar152055 results: before betatron match

14 hours 27 minutes ago
Log Number: 4477159Logbook(s): 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
yoon

Fopt - before betatron match

14 hours 30 minutes ago
Log Number: 4477157Logbook(s): Tags: 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.
yoon

Cavity History C75 Bypass Moving Tuners Individually

14 hours 49 minutes ago
Log Number: 4477155Logbook(s): 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.

bschauml

Iterate M5,6

15 hours 35 minutes ago
Log Number: 4477154Logbook(s): Entry Makers: yoonBody: 

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

yoon

Mid shift update, for those following from home

16 hours 10 minutes ago
Log Number: 4477151Logbook(s): 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.

eforman

Shift Information

Shift Day
CEBAF Program
MCC Crew Chief Humphry
MCC Operators Blackshaw, Janak
Program Deputy Roblin
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