Aggregator

Log Number: 4481039Logbook(s): 

• ELOG

Body: 

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

MBM7E01H
MBM7E01V
MBM9E01H
MBM9E01V
MQABE01
MBDBE01H
MBDBE01V
MBT1E01V
MQB3E01
MBM3E01H
MBM3E01V
MBM5E01H
MBM5E01V
MBC7S10H
MBC7S10V
MQA9S06
MBC9S06H
MBC9S06V
MQB1E01
MBT1E01H
MBT1S10H
MBT1S10V
MQA3S10
MBC3S10H
MBC3S10V
MBC5S10H
MBC5S10V

Total Time: 3.017 mins

Log Number: 4481038Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Friday March 27 through 18:00 Saturday March 28 Operations NLGP Drift Troubleshooting: Take an Off Cavity and tune it back to resonance with beam through NL

2026-03-28 11:03

Log Number: 4481035Logbook(s): 

• ELOG

Entry Makers: yoonBody: 

took setpoint and cycled

Log Number: 4481034Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16560Title:
Hall C BNR

Summary:
Hall C BNRDuration:
49 minutes

Time Down:
28-Mar-2026 15:58

Time Up:
Category:

Log Number: 4481033Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             03/28/2026
SHIFT:               Swing

The operator has read the following:

Log Number: 4481032Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Yoon
DATE:             03/28/2026
SHIFT:               Swing

The operator has read the following:

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

Log Number: 4481027Logbook(s): 

• ELOG

Entry Makers: janakBody: 

Took setpoint and cycled.

Log Number: 4481023Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

Seems like LEM sets this cavity really low for some reason. If I recall correctly, C100s lose stability around 8 MV/m. Maybe higher.

Additionally, LO for 1L07-1, 2, and 5 is very low and noisy.

I couldn't find any ELogs mentioning a reasoning for the low GSET and LO power. I did find an ELog that also noted the odd low GSET of Cavity 1 and that it was 40 degrees off phase (see linked ELog).

Log Number: 4481018Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl05

Saved: eforman 03-28-26 15:34:53 {A:i B:5 C:2 E:345 A=BS B=BS C=CW D=BS 0R08=0.39 No dumps in.

Log Number: 4481014Logbook(s): 

• ELOG
• LERFLOG

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

Date : 03-28-26
Time : 15:27:36
Day : Saturday
Shift : Swing

Crew Chief : Forman
Program Deputy: Malace
Team : F
Arm : Schaumloffel
Designated SSO: Yoon
LERF Operator:
Operators : Schaumloffel, Yoon

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

Log Number: 4481010Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Hall C Beam centering in progress

Log Number: 4481007Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

I didn't catch the 2A during my mid shift picture. See the linked ELog for a snapshot of the 2A at noon-ish.

Beam was pretty stable for most of the day. However, we noticed a dramatic NL slip around 1340 which correlates to a drop in current from Hall C.

I was curious to see if turning off the Orbit Locks and energy locks could be a part of the problem but the phase continued to slip after I paused them so I turned them back on.

Log Number: 4481003Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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

Log Number: 4480996Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

Took setpoint and cycled without issue.

Log Number: 4480986Logbook(s): 

• ELOG

Entry Makers: janakBody: 

We noticed GP had slipped again, possibly due to lower current (0.5 uA CW). Ran smartRAT after taking a snapshot of the waveforms. Didn't see any obvious cavities causing trouble.

Log Number: 4480985Logbook(s): 

• ELOG

Entry Makers: bjacobBody: 

Figure 1 shows 1A SLM before attempting any correction. It should be noted that the SLM filter is set to tune beam as we are only sending 0.5 uA to Hall C

Figure 2 shows the RF health check taken before adjusting the gangphase. 1L07 local oscilator power could be suspect.

Figure 3 shows the gangphase change. Almost 3 degrees. SL Gangphase looked fine after the change.

Figure 4 shows 1A SLM after currection

Log Number: 4480981Logbook(s): 

• ELOG

Entry Makers: janakBody: 

Starting positions on Carbon Hole
Horizontal:
IPM3H07A - 1.8
IPM3H07C - 1.8

Vertical:
IPM3H07A - 3
IPM3H07C - 3

11:50
Vertical:
IPM3H07A - 3 to 0
IPM3H07C - 3 to 0

12:07
Vertical:
IPM3H07C - 0 to 0.25

12:25
Vertical:
IPM3H07A - 0 to -0.8
IPM3H07C - 0.25 to -0.4

12:35
Vertical:
IPM3H07A -0.8 to -1.0
IPM3H07C -0.4 to -0.6

Log Number: 4480980Logbook(s): 

• ELOG

Entry Makers: janakBody: 

Log Number: 4480978Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4480976Logbook(s): 

• ELOG

Entry Makers: janakBody: 

Ion chamber calibration not required for targets receiving less than 2uA.