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SL RF Status

17 hours 54 minutes ago
Log Number: 4466704Logbook(s): 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.

anthony

Cryo Daily Work Summary

21 hours 27 minutes ago
Log Number: 4466701Logbook(s): 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.

radovic

MOLLER Install Update 01/16/2026

21 hours 34 minutes ago
Log Number: 4466700Logbook(s): Tags: 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.

lhurt

please keep an eye on 2L25

22 hours 1 minute ago
Log Number: 4466698Logbook(s): Tags: 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.

benesch

iocsl26rfhtr restored

22 hours 55 minutes ago
Log Number: 4466697Logbook(s): Tags: 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
alarms

2L25 status

23 hours 45 minutes ago
Log Number: 4466694Logbook(s): 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.

benesch

RF HV turn on in SL

1 day ago
Log Number: 4466693Logbook(s): 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.

anthony

ACG Report 01/16/2026

1 day ago
Log Number: 4466692Logbook(s): Tags: 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

higgins

SLinac/FEL Pumpdown Complete

1 day 1 hour ago
Log Number: 4466685Logbook(s): 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.

cryo

CATS Occurrence (Notable Event, Accident/Incident) Issue Approved

1 day 1 hour ago
Log Number: 4466683Logbook(s): 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
misweb

BSList #117047: pass 1 of parametric harp scans

1 day 1 hour ago
Log Number: 4466680Logbook(s): Entry Makers: brukerBody: 

After Tony found the problem with IHA0I02, I spent the rest of the shift testing how to make a comparative measurement of the phase space after the Wiens with VWien=0 and VWien=90 using the harp and MFX0I01.
As long as we are still working on the MFX0I01 calibration in parallel, the strategy for this part of the test is going to be to measure these two lens scans for different upstream focusing settings and empirically find the setting where the Wien has the least effect on the beam parameters, which implies minimum beam size inside the Wien.

bruker

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