Recent Log Entries

Log Number: 3657955Logbook(s): 

• ELOG
• LERFLOG

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

Date : 02-22-19
Time : 23:19:45
Day : Friday
Shift : Owl

Crew Chief : Merz
Program Deputy: Benesch
Team : D
Arm : Anthony
Designated SSO: Cade
LERF Operator:
Operators : Anthony, Cade

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

Log Number: 3657950Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Beam to all four halls.

Log Number: 3657948Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN

Log Number: 3657920Logbook(s): 

• ELOG

Entry Makers: staphanyBody: 

Cavity has SOSed four times this shift. De-rated by 0.2 MV/m.

Log Number: 3657915Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: staphany

Log Number: 3657914Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: BeamLossMonitor
User: staphany
Areas: All

BeamLossMonitor Devices:
ILM1L02
ILM0I07
ILM6R08
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0R04
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R06
ILM0R08
ILM0R09
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T09
ILM4C01
ILM4C02
ILM4C03
ILM1C01
ILM1C

Log Number: 3657891Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

The Hall A septum correctors have been adjusted to 30 amps upstream and 10 amps downstream for a septum setting of -1045.

The centering marker on the dump viewer screen has been restored (it seems to have disappeared at some point).

Log Number: 3657873Logbook(s): 

• ELOG

Entry Makers: staphanyBody: 

Log Number: 3657865Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: BeamLossMonitor
User: staphany

Log Number: 3657864Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: BeamLossMonitor
User: staphany
Areas: All

BeamLossMonitor Devices:
ILM1L02
ILM0I07
ILM6R08
ILM0L01A
ILM0L01B
ILM0L02
ILM2D00A
ILM2D00B
ILM0L04A
ILM0L04B
ILM0R04
ILM0L05
ILM0L06A
ILM0L08
ILM0R01
ILM4D00
ILM0R03
ILM0R06
ILM0R08
ILM0R09
ILM3S00
ILM7S00
ILM9S00
ILM5S10
ILM5E03
ILM7S01
ILM9A01
ILM3E02
ILM5A01
ILM1A04
ILM1A06
ILM3R10
ILM9R07
ILM1R09
ILM2L03
ILM5R10
ILM5R05
ILM2L01
ILM2T09
ILM8T09
ILM4C01
ILM4C02
ILM4C03
ILM1C01
ILM1C

Log Number: 3657855Logbook(s): 

• ELOG
• RADLOG

Entry Makers: staphanyBody: 

Log Number: 3657854Logbook(s): 

• ELOG
• RADLOG

Entry Makers: staphanyBody: 

Log Number: 3657851Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause5867Title:
Hall A Requests No Beam

Summary:
Re-booting target ioc.Duration:
1 hour 30 minutes

Time Down:
22-Feb-2019 17:31

Time Up:
22-Feb-2019 19:01

Log Number: 3657818Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause5867Title:
Hall A Requests No Beam

Summary:
Re-booting target ioc.Duration:
2 minutes

Time Down:
22-Feb-2019 17:31

Time Up:

Log Number: 3657816Logbook(s): 

• ELOG

Entry Makers: staphanyBody: 

Does not affect beam delivery and all beamline valves are open.

Log Number: 3657814Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

On the advice of Tom Powers, 2L13-7 was derated due to GMES instability. Removed 0.5 MV/m and distributed to other cavities in the zone. Noted fewer 4S00 BLM trips afterward and less GMES instability.

Log Number: 3657809Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

2L14-7 tuner found in manual mode. Didn't see a reason why in the elog or cavity hx tool. Switched back to auto. Seems to be working (DETA moving back toward zero).

Log Number: 3657788Logbook(s): 

• ELOG

Body: /cs/jtabs/edm/twiddle/trimscreen/5887098926550166346/2019-02-22_15.55.07-rebeccaj: Twiddle Diffs - Magnet changes to improve A2 interception
Differences between values from Twiddle Save
, ,
and present readbacks:

Log Number: 3657785Logbook(s): 

• ELOG

Entry Makers: hoflerrebeccajfreemanBody: 

Using the relative orbit from the injector allsave (19734), we made minor steering changes in the 0I region to restore the orbit and bring down interception on A2.

Fig. 1 Settings differences after steering (left) and before. 0L corrector and R04 GSET differences are orbit and energy lock changes.

allsave 19776 (saved with relative orbit from 19734)

Log Number: 3657782Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Forman
DATE:             02/22/2019
SHIFT:               Swing

The operator has read the following:

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