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Log Number: 3881254Logbook(s): 

• ELOG
• LERFLOG

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

Date : 06-20-21
Time : 02:10:48
Day : Sunday
Shift : Owl

Crew Chief : Surles-Law
Program Deputy: Carlino
Team : X
Arm : RADCON
Designated SSO: Garcia
LERF Operator:
Operators : Garcia

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

Log Number: 3881253Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Garcia
DATE:             06/20/2021
SHIFT:               Owl

The operator has read the following:

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

Log Number: 3881250Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

Numereous faults on cavity 5 of NL22 prevented it from being recovered with the rest of the zone. Expert screen in figure 1 shows the faults that need to be checked out and cleared to recover cavity.

Log Number: 3881249Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

All cavities in NL22 are on at 5 with the exception of cavity 1 which was GSET to zero when recovery started and resisted attempts to restore. Cavity 5 has a whole host of faults that need to be cleared (see figure 2)

Log Number: 3881248Logbook(s): 

• ELOG

Tags: 

• ShiftSummary

Body:  CEBAF SHIFT LOG Shift Summary

Start of shift: RF turn-on and Injector orbit drift investigatio

Log Number: 3881247Logbook(s): 

• ELOG
• RADLOG

Entry Makers: moserBody: 

Radiation area signs flipped prior to turning on C100s.

Noted mention of this for the NL/SL C100 klystron galleries when Accelerator in Beam Permit in RWP 2021-S011, but couldn't find mention of only RF turn-on operation in current 2021 RWPs.

Log Number: 3881246Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

When recovering RF in zone NL21 cavity 2, the cavity would appear to recover, but right after placing cavity in auto, a KRRP fault would trip it off. Operator tried this through several iterations with the same result.

Log Number: 3881245Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

RF is on in zone NL21 at 3 with the excpetion of cavity 2 (KRRP faults), cavity 6 at 2.5 (happier there than at 3) and cavity 7 which is bypassed.

Log Number: 3881244Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
Zone 1L21
Username: kerns
Date/Time: 06-19-21_23:20:18
RF Status: Bad
Comment: GLDE high on all cavities, RFCM supplies need checked.
Special Instructions:

Special Instructions:

Log Number: 3881243Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Thanks you all in OPS for the work bringing up the North Linac. You too, Nick , for the South Linac !!!!

Log Number: 3881242Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Need to check RFCM supplies for RMS since they are all warning.

Log Number: 3881241Logbook(s): 

• ELOG
• RFLOG

Entry Makers: kernsBody: 

Can mask the HV permit on cavity 4 to get it into hv, but no rf do to BLVF . The CPS is not showing on when it really is. We have cathode current on all klystrons but no CPS voltage or current readbacks. E. Valentine worked on this on Friday but we didn't have permit to check. Still not working.

Log Number: 3881240Logbook(s): 

• ELOG

Body: 

Late entry from home that I made at 1100 am but forgot to enter logbook so it didn't go !!! Dang it !! Load resistors in zones NL02, NL04, NL06, NL12, NL13, NL18, NL19, and NL20 were removed last Thursday to get these zones into HV for PSS. They do not have cathode current (KCCU) without loads and will not produce RF. For this reason, they should not be put into RF or they will just indicate sos'ing !!! Check the EXPERT page off the combo screen to see if there is KCCU. If 0.0 amps, leave RF off and log it. Thanks you all !!

Log Number: 3881239Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L03-4
Username: kerns
Date/Time: 06-19-21_21:34:09
RF Status: Bad
Tuner Status: Good
Comment: Arc detectors failing tests
Special Instructions:

Log Number: 3881238Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L03-3
Username: kerns
Date/Time: 06-19-21_21:34:09
RF Status: Bad
Tuner Status: Good
Comment: Arc detectors failing tests
Special Instructions:

Log Number: 3881237Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L17-2
Username: kerns
Date/Time: 06-19-21_21:27:02
RF Status: Bad
Tuner Status: Good
Comment: No drive output.
Special Instructions:

Log Number: 3881236Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

NL16-2 has tripped several times while recovering RF in the zone. On the last trip I tested the Arc Test Trip for cavity two. The test failed twice.

Log Number: 3881235Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

Log Number: 3881234Logbook(s): 

• ELOG
• RADLOG

Entry Makers: moserBody: 

Cavity 5 klystron current was low, but RF experts managed to goose it up.

All cavities' phase and gradient loops were saved Open in expert mode, dropping zone out of HV each time expert mode was engaged. Corrected.

All cavities open-loop tuned.

Log Number: 3881233Logbook(s): 

• ELOG

Body: 

1. Checked the reproducibility: orbit drifted in both x and y planes starting from vertical Wien. This is compared to the yesterday's setup. Minor steering corrected the drift. High current setup is still good.

2. Took emittance data using MFX2I01 and IVT2I01