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Log Number: 3825870Logbook(s): 

• ELOG

Entry Makers: eformanBody: 

Log Number: 3825867Logbook(s): 

• HDLOG
• HALOG
• HBLOG
• HCLOG
• ELOG
• SADLOG

Tags: 

• PD

Entry Makers: beneschBody: 

Four C100s in the NL and five in SL tripped with the thunder as I started writing.

Ops is still working on Compton background for hall A.

B and D have been getting beam after checking that they don't cause background in A.

C has been steered up for Moller measurement, including a 17% reduction in the 20 mm vertical chicane values to reduce vertical offset on diagnostic girder.

2L04 is recovering from a trip as I write; that's a C50. And all the SL C100s just went again.

Log Number: 3825866Logbook(s): 

• HDLOG
• HALOG
• HBLOG
• HCLOG
• ELOG

Entry Makers: moserBody: 

We've added +6 degrees of bunch compression into 0L04 gang phase. This appears to have greatly reduced Compton background rates in Hall A. They are setup to receive 150uA on Carbon-1% target to further check these.

Hall B and D have reported to adverse effects as a result of the bunch compression.

Hall C is awaiting the start of their Moeller measurement. It is setup and ready for 1uA.

If we can keep RF up, we plan to keep the bunch compression in 0L04 and get Hall A up to high currents, while continuing physics delivery to B and D and beginning the Hall C Moeller measurement.

Log Number: 3825863Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: moser 08-12-20 16:06:58 {A:1 B:5 C:5 E:1050 A=BS B=BS C=BS D=BS 0R08=0.00 No dumps in.

Log Number: 3825859Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause8403Title:
Afternoon Showers

Summary:
Tripping C100s, 5th pass vertical separator.

Log Number: 3825856Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause8402Title:
Vertical Separator Trip

Summary:
Thunderstorm tripped off the vertical separator.Duration:
11 minutes

Time Down:
12-Aug-2020 15:53

Time Up:
12-Aug-20

Log Number: 3825858Logbook(s): 

• ELOG

Entry Makers: mockBody: 

Ion chambers are set for 150 uA, raster is 2 x 2

Log Number: 3825857Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall A Target Movement FSD

Log Number: 3825851Logbook(s): 

• ELOG

Body: Faster Raster Mask State: (MASKED) Fast Raster is initialized for 2.17842 GeV Max current is 25 uA Raster was last initialized on 12AUG20 03:19:40
Hall A Raster has been set to X= 1.7 by Y= 2.3

Log Number: 3825850Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause8402Title:
Vertical Separator Trip

Summary:
Thunderstorm tripped off the vertical separator.Duration:
5 minutes

Time Down:
12-Aug-2020 15:53

Time Up:

Log Number: 3825847Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall A Target Movement FSD

Log Number: 3825844Logbook(s): 

• ELOG

Entry Makers: mockBody: 

Log Number: 3825843Logbook(s): 

• ELOG

Entry Makers: mockBody: 

Raster is off so we are limited to 5 uA on the dump.

Log Number: 3825840Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: IonChamber
User: mock

Log Number: 3825839Logbook(s): 

• ELOG

Tags: 

• Autolog

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

Log Number: 3825838Logbook(s): 

• ELOG

Entry Makers: rebeccajBody: 

Current is noisy on this magnet, DC power is aware. Changing the limit to reduce beeping in the control room.

Log Number: 3825836Logbook(s): 

• HALOG
• ELOG

Entry Makers: mockBody: 

Going positive 6 degrees on 0L04 gangphase reduces compton rates to background rates. Using 5.5 uA tune mode.
Hall B and Hall D are running at their desired currents of 200 nA and 350 nA CW respectively. Checking with halls if this is effecting their beam quality and seeing if we can run with this and will see how the rates look sending CW beam into Hall A.

Log Number: 3825831Logbook(s): 

• ELOG
• LERFLOG

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

Date : 08-12-20
Time : 14:56:02
Day : Wednesday
Shift : Swing

Crew Chief : Moser
Program Deputy: Benesch
Team : C
Arm : Forman
Designated SSO: Deir
LERF Operator:
Operators : Forman, Deir

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

Log Number: 3825829Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: Beam to the halls!

Log Number: 3825826Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

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