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ODH alarm, SL22

2 days 1 hour ago
Log Number: 4547299Logbook(s): Entry Makers: beneschBody: 

NL06 high, SL22 low, but the two SL sensors on either side of 22 are fine so it can be dealt with tomorrow.

benesch

CIS Work Summary 09/11

2 days 8 hours ago
Log Number: 4547296Logbook(s): Body: 

Lasers back on but need PSS laser bypass mode.
Leak checked HV chamber to verify no leak in ceramic.
Cleanroom in place; new electrode in tunnel; vacuum work will start on Monday.

suleiman

iocsoftw4spce restored

2 days 20 hours ago
Log Number: 4547291Logbook(s): Tags: Body: restorelib 3.0.1 Target restore date was 2026-09-12 20:44:02 The output from the myRestore execution was as follows: iocsoftw4spce systemEnum@2026-09-12 20:44 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsoftw4spce (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success
alarms

COMMENT ON Replace gun HV electrode

4 days ago
Log Number: 4547134Logbook(s): Body: 

cleanroom in place, working to get everything draped for clean work
Electrode moved to tunnel in small chamber.
Leak checked HV chamber to verify no leak in ceramic, completed pressure evaluation of HV chamber with extractor gauge (best pressure measured after nearly 1 week was 1.8e-11 Torr, higher than anticipated)

marcy

gun electrode swap mechanical update

4 days ago
Log Number: 4547133Logbook(s): Entry Makers: marcyBody: 

Cleanroom is in place, electrode is in tunnel (on cart in corner, do not disturb it), all supplies available for the vacuum work on Monday.

We'll do a very slow start, making sure to disable valves, lock out the laser shutter, and ensure all vacuum systems suitable before venting the gun. Details in spreadsheet as usual

marcy

gun electrode work update vacuum

4 days ago
Log Number: 4547132Logbook(s): Entry Makers: marcyBody: 

Leak checked the HV chamber by opening to the prep chamber with the RGA on. (Extractor on throughout)

No hint of any leak found in the ceramic.
Fig 1: ion pumps during vacuum evaluation. All changes due to turning gauges on/off, degassing gauges, and opening/closing the gun valve. Nothing unexpected

marcy

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CEBAF Program
MCC Crew Chief Howard
MCC Operators
Program Deputy Ghosh
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