Aggregator

Log Number: 4485863Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4485859Logbook(s): 

• BTLOG
• ELOG

Entry Makers: samariBody: 

The double peak frequency of oscillation at is very consistent in fig 1 at 1E01, the first single pass SEE BPM past the NL. The injector SEE BPM's sample rate is a little bit to high to see 60 Hz, So I can't differentiate between north linac and injector as the source. at 4E01, the 60 Hz vertical oscillation amplitude grows to a whopping 1.5 mm (fig 2).

Log Number: 4485856Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

Zeroed the detune angle for this one. Didn't cure the flickery GMES, but brought CRFP down from ~2.5 to ~2.1, and GASK down from ~2.6 to 2.4.

Log Number: 4485850Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

Log Number: 4485849Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

Didn't need to zero the detune angle, it looks like maybe I just put the tuner in a better spot. No change to CRFP; GASK is lower and quieter and GMES isn't flickering anymore.

Log Number: 4485846Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Samari
DATE:             04/10/2026
SHIFT:               Owl

The operator has read the following:

• ELOG
• PD Shift Plan
• Radiation Surveys for PSS Segments in Controlled Access
• PSS Log

Log Number: 4485844Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             04/09/2026
SHIFT:               Owl

The operator has read the following:

• ELOG
• PD Shift Plan
• Radiation Surveys for PSS Segments in Controlled Access
• PSS Log

Log Number: 4485842Logbook(s): 

• ELOG

Entry Makers: alexsBody: 

So far, the indicator most correlated with drifts in the north linac gang phase has been the Zone 1 temperature in the service building (Figure 1. Second chart with negative zone temperature to better show correlation). I took a walk out to visually inspect that area (Figure 2), and found that the MO line behind 1L02 has a lot of insulation peeled off with a decent chunk of the MO exposed (Figures 3-5) compared to the same area in the south linac (figure 6). Bundling this section back up might not be a bad idea.

Log Number: 4485835Logbook(s): 

• ELOG
• RFLOG

Entry Makers: dturnerBody: smartRAT V3-3 on opsrfdaqnl1

To view waveforms from a timestamp:

ssh opsrfdaqnl1 "smartRAT -m DAQ -d /data/fast_daq/<timestamp>"


To view waveforms of the top 25 from this report:

ssh opsrfdaqnl1 "smartRAT_view_daily_top25 2026-04-02-2026-04-09"


Data directory: /cs/prohome/apps/s/smartRAT2/3-3/fileio/pca_data/output_cavityOutDet/calibrated_cavitylevel_centralize_tsfresh_minimal_gmespmes/whole/rcntnp/2026-04-02-2026-04-09/PCA/

Log Number: 4485832Logbook(s): 

• ELOG

Entry Makers: deirBody: 

Figs 1&2: Comparison of main machine harp velocities vs. Hall C. Additionally, the 3C07A/B, 3C12A/B, and 3C17A/B harps all have x,y,x wires.

On the 3C07A/B harps, there's not a lot of motion on either the x or y wires for these swipes. Judging by the Hall C Steer Up screen and the BPM screen, this is not a particularly dispersive region.

On the 3C12A/B harps, interestingly enough, there's almost no motion on the y wires but the x wires show heavy beam jitter.

Log Number: 4485830Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: kprice 04-09-26 23:25:06 {A:i B:5 C:2 E:345 A=BS B=BS C=CW D=BS 0R08=15.09 No dumps in.

Log Number: 4485829Logbook(s): 

• ELOG
• LERFLOG

Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 04-09-26
Time : 23:19:21
Day : Thursday
Shift : Owl

Crew Chief : Price
Program Deputy: Ogur
Team : D
Arm : Samari
Designated SSO: Smith
LERF Operator:
Operators : Samari, Smith

This stamp certifies that the above Crew Chief has read/reviewed/received the following:

Log Number: 4485828Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: 15uA CW to Hall C.

Log Number: 4485827Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4485825Logbook(s): 

• ELOG

Body: 

Swapped cards for MDJ0L08V and MDJ0L10V. MDJ0L08V shows minor voltage alarms after trying three different cards. See elog 4485804

Log Number: 4485814Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16695Title:
HMS dipole issue

Summary:
Hall staff requested no beam to address an HMS dipole issue.Duration:
1 hour 54 minutes

Time Down:
09-Apr-2026 19:55

Time Up:

Log Number: 4485812Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: lrichard
Areas: All

BeamLossMonitor Devices:
ILM0I07
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R04
ILM0R06
ILM0R08
ILM0R09
ILM1L01
ILM1L02
ILM6R08
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM1A09
ILM5A10
ILM1A16
ILM1A19
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
IL

Log Number: 4485810Logbook(s): 

• ELOG

Entry Makers: lrichardBody: 

This is just one of the slippages of the evening.

Log Number: 4485809Logbook(s): 

• ELOG

Body: 

Laser Used:

B Laser

Sigmas:

Peak 1 - x Sigma: 0.5510 Peak 2 - u Sigma: 0.6194 Peak 3 - y Sigma: 1.3343

Log Number: 4485807Logbook(s): 

• ELOG

Body: 

Laser Used:

B Laser

Sigmas:

Peak 1 - x Sigma: 1.0652 Peak 2 - u Sigma: 0.8037 Peak 3 - y Sigma: 1.6688