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Log Number: 4153698Logbook(s): 

• ELOG

Body: 

Task is complete.

Log Number: 4153697Logbook(s): 

• ELOG

Body: 

This task will stay open until maintenance is complete as part of SAD.

Log Number: 4153696Logbook(s): 

• ELOG

Body: 

Task is complete. Further flushing and improvements will be under a different work plan.

Log Number: 4153695Logbook(s): 

• ELOG

Body: 

Task complete for the run

Log Number: 4153694Logbook(s): 

• ELOG

Body: 

The tests for this task are complete. If needed, further checks will take place after maintenance during HCO.

Log Number: 4153693Logbook(s): 

• ELOG

Body: 

Review completed . This step is only to turn off power to the racks.

Log Number: 4153692Logbook(s): 

• ELOG

Body: 

Late entry:

All EMI supplies were removed from the racks and taken out of the buildings.

Diggs, Kissinger, Richardson, Humphry, Delk

Log Number: 4153690Logbook(s): 

• CLOG
• ELOG

Entry Makers: norton,ballardj,cryoBody: 

Afternoon walk for CTF, HDR, CHL1, CHL2, ESR. No issues.

Log Number: 4153689Logbook(s): 

• ELOG

Body: 

4K and at least 40% liquid should be just fine for adjusting Qext. There will be excessive microphonics that will make the BW measurements noisier if the shields are at 100 K rather than their nominal 40K.

Log Number: 4153687Logbook(s): 

• ELOG

Entry Makers: hunewillBody: 

Enable automatic slide valve control on C9.

Log Number: 4153685Logbook(s): 

• ELOG

Body: 

Task discussed with owner and approved.

Log Number: 4153684Logbook(s): 

• ELOG

Body: 

We will keep it open until ODH alarm system is returned to the normal configuration.

Log Number: 4153681Logbook(s): 

• ACELOG
• ELOG

Entry Makers: stepfkBody: 

All condition appears normal.

Log Number: 4153680Logbook(s): 

• ACELOG
• ELOG

Entry Makers: stepfkBody: 

All condition appears normal.

Log Number: 4153676Logbook(s): 

• ELOG

Body: 

Resubmitting for approval. Plan is to start measuring and adjusting Qext as needed to reach target of 1.5e7 on C100 zones. Qext measurements would start on NL as soon as Helium and shield temperatures allows it. As suggested by J. Benesch we need to determine if 4K Helium temperatures is a suitable temperature to work the Qext adjustments. We do have 1L23 as reference since we did stub tunning work while @ 2K last SAD. We can start measuring Qext there and decide how to proceed.

Log Number: 4153673Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 2.6 Target restore date was 2023-03-24 16:49:10 The output from the myRestore execution was as follows: iocsoftvac1 systemEnum@2023-03-24 16:49 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -s -i iocsoftvac1 (success) Procedure return status: Success

Log Number: 4153667Logbook(s): 

• ELOG

Body: 

Phil found a tiny leak in the gasket for the harp we installed Wednesday.
We removed the harp to change the gasket and broke a harp wire during the reinstall.
Re-wired the harp (borrowing Tony's wire - thanks!), installed again, checked for shorts, and pumping down now.

https://logbooks.jlab.org/entry/4153631

Log Number: 4153631Logbook(s): 

• POLOG
• ELOG

Entry Makers: marcyBody: 

Harp installed on Wednesday. Found a leak yesterday in the gasket.

vented and removed harp to replace gasket today. During replacement, gasket slipped and broke harp wire.

Re-strung harp with wire from Tony.

Checked for shorts on insertion and retraction - seems ok, but manual retraction was causing the fork to vibrate and there was a tiny intermittent short - we'll have to verify that there are no shorts during normal operation with the controller.

Repaired harp reinstalled, tightened gasket, pumping down.

Log Number: 4153629Logbook(s): 

• ELOG

Body: 

All MCC work is completed for now, pending completion of installation works in the field.
We have completed all maintenance on the following segments/systems.
* Injector
* North Linac
* Hall A
* Hall B
* Hall C (System B)
* EPICS Firewall

Log Number: 4153628Logbook(s): 

• ELOG

Body: 

Approved