Aggregator

Log Number: 4549043Logbook(s): 

• ELOG
• POLOG

Body: 

Came in ~3pm to check on bake. Bake oven values look good. Noticed the TC's tied to the "overboard" IP were ~30C, investigated and found "overboard" variac IP off, turned on and set to 85/140. Monitored for ~15 min, fuse faulted again. I added a second supplemental variac called "overboard #2" and to the local spreadsheet. This worked. Now, "overboard" is heating the overboard IP/line and "overboard #2" is heating the turbo line and Kr plumbing. Overboard set to 90/140 ~ 65% and Overboard #2 to 65%.

Log Number: 4549041Logbook(s): 

• POLOG
• ELOG

Entry Makers: marcyBody: 

Riad checked early this morning and found that all the heat tapes on one variac were cool. This includes the overboard ion pump, foreline to the pump cart and the Kr line under the table. (Kr line variac now only has the flex line to the pump cart attached)

I came in to investigate, found that the variac fuse had blown. Replaced with new 10A fuse, reduced setpoint and started ramp again. I had moved an additional heat tape to this variac yesterday and it drew too much current overnight. This should not affect the overall bake.

Log Number: 4549040Logbook(s): 

• ELOG
• SLOG

Tags: 

• MCC8am
• Software and Controls

Body: 

CHL Control Room Network Infrastructure Relocation:
Moved CHL control room workstations to new switch. Removed a boat load of old network cable between the racks in the control room.
Moved copper cables from old chl router to patch panel in CHL control room, and dressed up cables at the end rack.
Latosky Cumbia

Log Number: 4549037Logbook(s): 

• POLOG
• ELOG

Body: 

• Worked with software and updated mirror steering control screens for lasers A and B.
• Replaced the laser B TMG control box with an updated version and verified functionality.
• Installed new lambda/10 WPs with adapters in the IA rotation mounts for lasers B, C, and D.
• Switched the IA Pockels cells between laser A and laser C.
Also, in progress: updating the optical layout to reflect the new laser configurations.

Log Number: 4549035Logbook(s): 

• ELOG
• POLOG

Body: 

reprogrammed bake to have control flange reach 265 to ramp the other TCs closer to 250C. Soak times adjusted so it will still ramp down Sunday morning for NEG activation. Increased variac for overboard IP heater slightly

Log Number: 4549034Logbook(s): 

• ELOG
• POLOG

Body: 

Bake continues to go well. HV chamber TC's dropped into the 215-230 C range after moving reference TC to 4-1/2" gun IP flange, which is nearer a heat bar. Marcy is going to adjust that the SOLO controller to raise the control setpoint on the reference TC to elevate temps another 10-20 C so chamber values will be >230 C. She'll do that this evening and Riad will check-up on bake early Sat AM. Good teamwork.

Log Number: 4549033Logbook(s): 

• ELOG

Tags: 

• Autolog
• MCC8am

Body:  */ ATLis Comments Posted 18:00 Thursday October 01 through 18:00 Friday October 02 AES DC power Systems Trim Rack Blower Replacements in E1, E5, and W1 (SAM 2026)

2026-10-02 15:10 - Eric Diggs

Log Number: 4549032Logbook(s): 

• ELOG

Entry Makers: marcyBody: 

Moved control to the flange closest to the heaters (4.5" ion pump flange) so max temp is 250. All parts of the bake are now at temperature, mostly a bit below 250C since they are farther from the heaters.

**Energized overboard bake ion pump: Ion pump on cart reading in 10^-7 Torr range - tried turning on overboard ion pumps, which is at 120 C, and it came on at ~400 uA. Leave this on, close valve between turbo cart and overboard IP.

Log Number: 4549031Logbook(s): 

• ELOG

Body: 

IMPORTANT NOTE. If there is a power failure over the weekend that effects the emergency power loop in the north linac contact me (office x7660 rings through to cell) or page Frank Humphry using staff search so that we can come in and confirm that vacuum is still happy.

2 Oct. 1L07 update. We finished processing all of the cavities one time. We will process them a second time on Monday and should be done by early Tuesday afternoon.

At the end of the shift. We secured the RF and turned off the amplifiers. We closed off the gas supply valve at the cavity gas supply* valve.

Log Number: 4549029Logbook(s): 

• ELOG

Body: 

PM steps not requiring LOTO completed for BS05B03 and BS05B04. Also went back and did some cleaning of sticky DC output connector shells in all of the 20 Amp trim system racks.

Log Number: 4549028Logbook(s): 

• ELOG
• DCLOG

Body: 

Working under PTW-11615. Preventive maintenance for ARC5 and RSEP9 is complete. ARC1 PM is underway.

-O'Brien, Banks, Crespo

Log Number: 4549027Logbook(s): 

• ELOG
• ACELOG
• CLOG

Body: 

Moved copper cables from old chl router to patch panel in CHL control room, and dressed up cables at the end rack. We'll move out fiber cables from old chl router to new chl router on Monday.
Latosky
Cumbia