Aggregator

Log Number: 4463548Logbook(s): 

• ELOG
• POLOG

Body: 

Wien cooling plates test Day 1 summary: https://logbooks.jlab.org/entry/4463541
Turned on V-Wien cooling plates chiller set to 27 Celsius at 9:00 am, then ramped up to 90 deg spin angle by ~ 10:30 am. After 5 hour soak, temperature readbacks remain stable at 26 Celsius on the Wien magnet yoke, with no indication of vacuum changes nor HV trips.

Log Number: 4463546Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2025-12-11 08:31:05 The output from the myRestore execution was as follows: iocinbcmtc bcmtc@2025-12-11 08:31 The EPICS 'put' failed for the following IBC0L02:bcmtccfg2_b IBC0L02:bcmtccfg_b IBC0L02:bcmtccyct_w IBC0L02:bcmtcpidD_w IBC0L02:bcmtcpidI_w IBC0L02:bcmtcpidP_w IBC0L02:bcmtcsp1_w 1(8) restored systemEnum@2025-12-11 08:31 2(2) restored Pause: 20 second(s) camonsave@2025-12-11 08:31 1(1) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocinbcmtc (succ

Log Number: 4463545Logbook(s): 

• ELOG
• SLOG

Entry Makers: tsmBody: 

Log Number: 4463544Logbook(s): 

• POLOG
• ELOG

Body: 

2 attachements were missing from the previous log entry, attach again.

Log Number: 4463543Logbook(s): 

• POLOG
• ELOG

Body: 

We checked most of the items (#3.3 thru #3.16 on the checklist) on 12/5/2025, except for the laser retro (gun valve could not be opened) and attenuator scan (added item later, but not on the HCO list). Max and I was able to complete the retro and attenuator scan on 12/12/2025 after the gun valve issue was resolved. Today Max helped to complete #26 (Laser attenuator setting for10uA to the PCup (LOG# 4463468)). All the items have been checked at this point.
Completed cebaf laser checklist is attach along with the referenced documents.

Log Number: 4463542Logbook(s): 

• ELOG

Body: 

Looking to complete HCO up to the 1D dump on Wednesday 12/17 to hopefully get started on some KeV beam restore before the Winter Shutdown. The following log entry is a systems readiness and beam authorization update for that goal.
A couple disclaimers: First, not every component in SRM has to be green-thumb ready in order to proceed with operations. Secondly, even if an item needs more than one sign-off to be green-thumb Ready, it only gets counted as one item not green-thumb Ready in the Overall Status. It would then show up on multiple group reports.

Log Number: 4463541Logbook(s): 

• POLOG
• ELOG

Entry Makers: chgarciaBody: 

After starting on the Wien cooling plates chiller and set to 27 Celsius this morning at 9 am, I started ramping the Vertical Wien from 0 to 90 deg spin rotation angle using the Injector steering script. This sets the V-Wien magnet MWF1I04 current to 14.6 A, and each electrode plates to +/- 18 kV.

With the recently installed cooling plates, there is no indication of vacuum changes, nor of HV trips within the first 5 hours. The TC on the Wien magnet reads 26 Celsius, while the chiller reads 27 Celsius.

I will leave the V-Wien soaking under these conditions overnight.

Log Number: 4463540Logbook(s): 

• ELOG

Body: 

Power Outage to occur Weds 12/17 at 0700. With any luck, wrapped up before lunch.

Log Number: 4463539Logbook(s): 

• ELOG

Body: 

Power Outage to occur Tues 12/16 at 0700. With any luck, wrapped up before lunch. Only house power will be affected (i.e. emergency power will not be).

Log Number: 4463537Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2025-12-11 08:31:05 The output from the myRestore execution was as follows: iocinbcmtc bcmtc@2025-12-11 08:31 The EPICS 'put' failed for the following IBC0L02:bcmtccfg_b IBC0L02:bcmtccfg_damp IBC0L02:bcmtccyct_w IBC0L02:bcmtcpidD_w IBC0L02:bcmtcpidI_w IBC0L02:bcmtcpidP_w IBC0L02:bcmtcsp1_w 1(8) restored systemEnum@2025-12-11 08:31 2(2) restored Pause: 20 second(s) camonsave@2025-12-11 08:31 1(1) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocinbcmtc (su

Log Number: 4463536Logbook(s): 

• ELOG

Body: 

All interlocks for the South Access Box Supplies have been checked and completed. We will move to the North Access to continue with interlock checks starting tomorrow, 12/15/25. This will also include doing the magnet interlock chassis upgrade for the ARC10/AA box supply.

Log Number: 4463535Logbook(s): 

• ELOG

Body: 

Noticed no KCCU for cavity 8. Troubleshooting next opportunity.

Log Number: 4463533Logbook(s): 

• ELOG
• SRFLOG

Body: 

1L10 plasma processing
- Removed vacuum and gas carts from VIP1L10B and VIP1L11A
- Removed supplementary turbo pump carts from VIP1L10A and VIP1L11B

Log Number: 4463531Logbook(s): 

• ELOG

Body: 

The LERF is Complete. Let me know if there are any issues. I will close this task list tomorrow to allow for comments if any.

Log Number: 4463530Logbook(s): 

• ELOG

Body: 

HV restored successfully, but could not get RF ON due to South Linac MO amplifier not generating enough power. Will need to replace failed MO amp with spare.

Log Number: 4463529Logbook(s): 

• ELOG

Body: 

Discussed what remains to be done on this task extensively with task owner. Many thanks for the discussion.

Plan moving forward:
* Monday 12/22, simultaneous with emergency panel NL-PP1 outage (see related task), going to cut over the InjSB and NLSB to fiber and look for noise on the system. If needed, will cut back to copper and devise plan of attack for early January. If all looks well, will leave fiber in place. THE WARM RF INJECTOR COMPONENTS WILL NEED TO BE RE-PHASED either way, i.e. leaving MO over fiber or going back to copper.

Log Number: 4463527Logbook(s): 

• ELOG

Body: 

2 filament boards diagnosed and delivered for repairs, and installed new contactor in 1L10. Adam S., Maxwell S., Alex S.

Log Number: 4463526Logbook(s): 

• ELOG

Body: 

issues never arose again after we stepped the 5V rail up to 5.2V. Going forward new chassis and any having issues will have its 5V rail increased. consider task complete.

Log Number: 4463525Logbook(s): 

• ELOG

Body: 

further work was handed off to technician who has created a new general work atlis and Epas on the BCM cavities. consider this entry and it's paperwork closed.

Log Number: 4463524Logbook(s): 

• ELOG

Body: 

work complete