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CREW CHIEF SIGN IN

Recent Log Entries -

Log Number: 3881254Logbook(s): 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:

Operator SIGN IN

Recent Log Entries -

Log Number: 3881253Logbook(s): 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

RF in zone NL22 on in GDR at 5

Recent Log Entries -

Log Number: 3881249Logbook(s): 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)

NLSB C100 Klystron Gallery

Recent Log Entries -

Log Number: 3881247Logbook(s): 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.

NL21-2 KRRP faults

Recent Log Entries -

Log Number: 3881246Logbook(s): 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.

RF in zone NL21 is on

Recent Log Entries -

Log Number: 3881245Logbook(s): 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.

0L04 No RF Go

Recent Log Entries -

Log Number: 3881241Logbook(s): 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.

Zones in the North without Klystron Load Resistors

Recent Log Entries -

Log Number: 3881240Logbook(s): 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 !!

NL16-2 tripping on Arc Faults

Recent Log Entries -

Log Number: 3881236Logbook(s): 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.

0L03 -- All Cavities Tuned and Up at 3MV/m

Recent Log Entries -

Log Number: 3881234Logbook(s): 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.

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