Aggregator

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.

Log Number: 4480975Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4480974Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4480973Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4480964Logbook(s): 

• ELOG

Body: Faster Raster Mask State: (B MAGNETS MASKED) Fast Raster is initialized for 1.41893 GeV Max current is 60 uA Raster was last initialized on 28MAR26 07:53:15
Hall C Raster has been set to width = 2.0 by height = 2.0 Coil Pairs is 1

Log Number: 4480954Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

NL/SL phase is stable with CW beam, no phasing required at this time.

Log Number: 4480942Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

Log Number: 4480939Logbook(s): 

• ELOG

Body: Faster Raster Mask State: (MASKED) Fast Raster is initialized for 1.41893 GeV Max current is 60 uA Raster was last initialized on 28MAR26 07:53:15
Hall C Raster has been set to width = 3.0 by height = 3.0 Coil Pairs is 1

Log Number: 4480938Logbook(s): 

• ELOG

Entry Makers: chumphryBody: