Recent Log Entries

North Liniac Cryo instabilities.

Log Number: 3814957Logbook(s): Entry Makers: carlinoBody: 

All of the C100 in the north linac are showing liquid level instabikities that started around 1800 on 07/15/2020. As can be seen 1L24 is pareticularly affected, making it virtually unrunable, as it will not stay on GDR mode.

CREW CHIEF SIGN IN

Log Number: 3814954Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 07-16-20
Time : 07:06:53
Day : Thursday
Shift : Day

Crew Chief : Carlino
Program Deputy: McGuckin
Team : X
Arm : Richardson
Designated SSO: Richardson
LERF Operator:
Operators : Richardson

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

ODVH checks

Log Number: 3814950Logbook(s): Tags: Entry Makers: beneschBody: 

Only the C50s and C100s are expected to be stable at their ODVH values. For most of the C25s, ODVH=GSET.DRVH and the latter is set to one hour fault interval predicted by my statistical models. Module type is indicated in the top left corner of the combo screen and by color on
https://accweb.acc.jlab.org/RFDashboard/reports/cm-perf?date=2020-07-16&...

Unfortunately, there is no automated way to update the cavity history text files when I do semi-annual bulk uploads of new lem models and replace ODVH constraints with new models.

NL18 HPA overload

Log Number: 3814945Logbook(s): Entry Makers: friersonBody: 

The zone experienced the overload fault right before 0100. After numerous attempts to clear the fault, it will be left alone for the RF group to address during the day's activites.

CREW CHIEF SIGN IN

Log Number: 3814944Logbook(s): Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 07-16-20
Time : 02:46:43
Day : Thursday
Shift : Owl

Crew Chief : Frierson
Program Deputy: McGuckin
Team : D
Arm : RADCON
LERF Operator:
Operators :

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

1L06-3,4 unable to reach ODVH

Log Number: 3814931Logbook(s): Entry Makers: mockBody: 

Both cavities will not go above 10 MV without effecting the other cavity. One will cause the other to SOS or a CWVF will show up for both.

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