Aggregator

Log Number: 4364242Logbook(s): 

• ELOG

Body: 

HYST AREA Version 6-4-1 has successfully cycled the following:

Area.Linacs.North

Total Time: 3.133 mins

Log Number: 4364241Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: BeamLossMonitor
User: mock
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
ILM8T09<B

Log Number: 4364240Logbook(s): 

• ELOG
• CLOG

Tags: 

• Autolog

Body: LEM 9.19 was successfully run for the North Linac on 2025-04-24 09:14:51. The application phase took 00:00:15 to complete.

Log Number: 4364238Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

FudgeIt 4.5 changed the North Linac fudge factor from 0.986 to 0.981.

Log Number: 4364229Logbook(s): 

• ELOG

Body: 

HYST AREA Version 6-4-1 has successfully cycled the following:

Area.Linacs.North

Total Time: 3.133 mins

Log Number: 4364226Logbook(s): 

• ELOG
• CLOG

Tags: 

• Autolog

Body: LEM 9.19 was successfully run for the North Linac on 2025-04-24 09:05:29. The application phase took 00:00:21 to complete.

Log Number: 4364227Logbook(s): 

• HDLOG
• ELOG

Entry Makers: schoeneBody: 

DCP Turned Tagger back over to Ops, cycling to prepare to restore beam to Hall D.

Log Number: 4364225Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavities have been GSET 0:
1L11-8
Username: shriner
Date/Time: 04-24-25_09:03:49
RF Status: Bad
Tuner Status: Good
Comment: GSET 0 - stepped off +100k - PMES instablity; likely 2.5W amp
Special Instructions:

Maintenance Tag: Component: Operator Entry - See SME

Log Number: 4364221Logbook(s): 

• ELOG

Entry Makers: alexsBody: 

The beam spot started swinging wildly on the SLM. 1L11-8 has a suspected bad 2.5W causing phase instability, and lo and behold, its PMES started swinging. Next trip will GSET0 the cavity and see if it improves.

Log Number: 4364215Logbook(s): 

• ELOG

Entry Makers: shrinerBody: 

took setpoint and cycled

Log Number: 4364204Logbook(s): 

• ELOG

Tags: 

• MCC8am

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Winding down for MD

Log Number: 4364203Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Barker
DATE:             04/24/2025
SHIFT:               Day

The operator has read the following:

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

Log Number: 4364201Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR IN TRAINING SIGN IN FORM OPERATOR:    Shriner
DATE:           04/24/2025
SHIFT:             Day
MENTOR:         Vasilauskis

The operator has read the following:

Log Number: 4364197Logbook(s): 

• HALOG
• ELOG

Entry Makers: schoeneBody: 

.

Log Number: 4364193Logbook(s): 

• ELOG

Body: Calibration ParametersHall:ATarget: Loop 1 30cmPass: 3Note: .6x.6 raster, up to 5 uACalibrated On:2025-Apr-11 20:45Calibrated By: samariFile:A-2025-04-11_2045_Loop_1_30cm_Pass-3.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4364184Logbook(s): 

• ELOG

Body: 

Mag Meas:

Have completed all XP dipole inspections in West Arc and 5C line, mostly in decent order.  The hoses vary quite a bit in length, have gathered a good number of return hose lengths to start on when we have materials.  Will capture the rest of needed lengths next time machine is open.

Log Number: 4364183Logbook(s): 

• ELOG

Entry Makers: samariBody: 

After speaking with DC Power On-Call, the issue appears more complex than anticipated after a local reset did not resolve it. Further investigation of the box supply is required.

Log Number: 4364182Logbook(s): 

• ELOG

Entry Makers: friersonBody: 

Yesterday's MD started at 0800 with beam off to the halls and Ops taking some diagnostic saves of the machine configuration before shutting equipment down (). RadCon assisted with surveys of the main machine and the halls with most areas in Restricted Access by 1030. Thanks to them for the assistance. There was lots of work complete despite the late start. Let's take a look at what was accomplished:

Log Number: 4364179Logbook(s): 

• ELOG

Entry Makers: dthomasBody: 

After D Tagger tripped off, we tried sending xA/B. Hall D east wall IC kept tripping FSD. Close xC/D slit and saw, no more FSD tripping but saw rates on the East wall IC. Ops dug around and found that it was bleedthrough, most likely from B beam getting dumped on the MS.

Log Number: 4364178Logbook(s): 

• ELOG

Entry Makers: samariBody: 

Apart from C75s and C100s, every cavity in the north linac exhibits 15 minute LO power oscillations consistent with the energy oscillations in D and current oscillations in Hall B. This is also tied with periodic loss in the west spreader (probably the lost current from Hall B). I ran a scipy FFT over a few hours of data for all of the LO signals, and the peak frequencies were consistently ~.0012 Hz, which matches with the frequency of the other signals. It would make the beam much more stable if we could weed out the root cause of these 15 minute LO Power oscillations.