Aggregator

Log Number: 4466709Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl01

Saved: bschauml 01-17-26 00:42:31 {A:5 B:3 C:1 E:340 A=BS B=BS C=Pulse D=BS 0R08=0.00 0R08 dump in.

Log Number: 4466708Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Schaumloffel
DATE:             01/17/2026
SHIFT:               Owl

The operator has read the following:

Log Number: 4466706Logbook(s): 

• SRFLOG
• CLOG
• ELOG

Entry Makers: johnwwisslerBody: 

We were unable to fill 2L03 completely, thus leaving the tanks slightly more filled than expected. With tanks 1, 3, and 5 online at around 10.3atm, we should be able to dump 2 tubes in the morning (raising tank pressure to around 13atm) without needing immediate liquefaction into the linac or dewar.

Log Number: 4466705Logbook(s): 

• SRFLOG
• CLOG
• ELOG

Entry Makers: johnwwisslerBody: 

After the pumpdown while we were attempting to control cryomodule level and tunnel pressure, we discovered that 2L02 and 2L16 did not have remote electric heat control. We could not fix these issues tonight, but hope to be able to address them tomorrow (Saturday) as 2L16 is a cryomodule which has been given the go ahead for RF testing.

Log Number: 4466704Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

There have been RF heater problems all night. 2L16 is still an issue and maybe 2L06. Attempted contact with RF Primary and Secondary on-call with no success. Tried to contact d. Gehlaar and O. Garza with no success either.
At this point Cryo is going home for the night. They filled 2L04, 2L22, 2L23 and 2L24 and said I could turn on RF in those zones. Those zones are listed as do not turn on RF zones. Cryo will be in tomorrow to continue filling. I provided them with the list of zones we are allowed to turn on RF in for priority tomorrow.

Log Number: 4466702Logbook(s): 

• ELOG

Body: INJECTOR=>LASER=>LASER_TABLE=>R0L3GMES has been disabled in alarm handler

Alarm in constantly. Laser nor in use.

Log Number: 4466701Logbook(s): 

• ELOG

Entry Makers: radovicBody: 

Removed Ltube and installed PR u-tube on 2L03.
Replaced CHL1 SC1R CC2 MECOS drive.
Completed 2K pumpdown of South Linac and LERF.

Log Number: 4466700Logbook(s): 

• MOLLER
• ELOG

Tags: 

• Moller
• PD

Entry Makers: jonesgaskelldwinesdougberdnikciprianBody: 

Continued installation work of LCW MOLLER system, an continued installation work, of Pion donut assembly. Hall A techs preparing documentation for up coming task this week. Which require fall protection permits, hot work permits and critical lift permits.

Log Number: 4466699Logbook(s): 

• ELOG

Tags: 

• CED

Body: The following control system variables were updated because they were detected to differ from their CED property counter-parts.

Log Number: 4466698Logbook(s): 

• ELOG

Tags: 

• Readme

Entry Makers: beneschBody: 

So far everything looks fine with the LL at 88% and low turbo foreline pressure. If the leak opens up the turbo will trip. If that happens, lower LL to ~70% until Tuesday.

Figure 1: turbo screen.

Figure 2: CC and pressure at the tee. Only the last is on a second vertical scale.

Figure 3: LL and JT are on the displayed vertical scale. Foreline pressure is on 15-20 mTorr scale. Turbo power autoscaling so look at range.

Figure 4: 8 seater

Figure 5: insulating vacuum screen showing three failed cold cathode gauges, 1L09, 1L23 and 2L25.

Log Number: 4466697Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2025-12-19 16:35:36 The output from the myRestore execution was as follows: iocsl26rfhtr <NOTE> Rf12Htr_2525: Provided macro *IOC* is never used Pause: 15 second(s) Rf12Htr_2525 Execute: caput R2QXHHTRMOD 0 (success) Old : R2QXHHTRMOD 0 New : R2QXHHTRMOD 0 Pause: 12 second(s) Execute: caput R2QXHTSWI 1 (success) Old : R2QXHTSWI OFF New : R2QXHTSWI MAN Pause: 3 second(s) Rf12Cryo_heatset@2025-12-19

Log Number: 4466694Logbook(s): 

• CLOG
• ELOG
• SRFLOG

Entry Makers: beneschBody: 

Figure 1 pump down
Figure 2 Turbo pump foreline dropped an order of magnitude as helium pressure dropped a factor of 25. Turbo pump power dropped from 9W to 6 W. LL at 80.5%.

At 4K the turbo tripped off at 85% LL so we can't yet be sure about the module.

JT max is set to 80% so LL will creep up hereafter towards 88% set point.

Log Number: 4466693Logbook(s): 

• ELOG

Entry Makers: anthonyBody: 

Turned on HV Only for zones 2L06, 2L07, 2L09, 2L11, 2L13, 2L15, 2L16, 2L19, 2L20, 2L21, 2L23 and 2L24 as directed by RF HCO and Gradient Ramp 2026 ATLis. No issues with HV on. First try with each zone.

Zones still have to fill before RF On. That will be awhile. Included a messy looking plot for the zones where RF couldbe turned on later.

Log Number: 4466692Logbook(s): 

• ELOG
• SLOG

Tags: 

• MCC8am
• Software and Controls

Body: 

Workflow documented for ioc creation, configuration, and soft IOC management
Refined prototype for gradient limit tracking for rf cavities
Patched jlab_archiver_client
Helped setup control system connections for Joe Meyers and Mike Beck at Magnet Test Area
CED Updated for ITV8T09 and ITVAT09A

Log Number: 4466689Logbook(s): 

• ELOG
• SRFLOG

Body: 

[ITV{8T09, AT09A}
- VIP4T09A, VIP4T09B, and VIP8T08A ion pumps replaced
- Pump down over weekend, leak check Tuesday

Log Number: 4466688Logbook(s): 

• ELOG

Tags: 

• Readme

Body: [figure:1] Always check the Authorization web application for the latest status: JLab Authorization Manager

Log Number: 4466687Logbook(s): 

• ELOG

Tags: 

• Readme

Body: [figure:1] Always check the Authorization web application for the latest status: JLab Authorization Manager

Log Number: 4466685Logbook(s): 

• CLOG
• ELOG

Entry Makers: johnwBody: 

SLinac/FEL Pumpdown Complete. We are working on balancing the linac load and are preferentially filling 2L02, 03, 04, 05, in addition to 2L22, 23, 24, and 26. 2L25 will be set to 50% and we will wait on guidence for when and how to fill it.

Log Number: 4466684Logbook(s): 

• ELOG

Body: INJECTOR=>LASER=>LASER_TABLE=>R0L4GMES has been disabled in alarm handler

Nusiance alarm. Hall D laser not in use.

Log Number: 4466683Logbook(s): 

• EHSLOG
• ELOG

Entry Makers: padiyarBody: A finding for an Occurrence (Notable Event, Accident/Incident) has been approved in the JLab Corrective Actions Tracking System.

Area(s):
12 - CEBAF Center
Issue:
The employee's work practices may not have been fully considered during initial ergonomic assessment, with an emphasis landing on keyboard work vs time spent with paperwork on the desktop.

You can view this issue here:
https://mis.jlab.org/ehs/tracking/view_finding.php?finding_id=51160