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Log Number: 4490239Logbook(s): 

• ELOG

Body: 

2L12 - Replaced Agilent scroll pump at 2L12 gate valve open turbo at full speed. Old pump staged for RADCON survey.

Log Number: 4490237Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The OPS DRVHs for the following cavities have been updated:
2L09-1
Username: kerns
Date/Time: 04-21-26_14:13:26
RF Status: Bad
Tuner Status: Good
Comment: DRVH=10.000 Onset of KRRP and upset vacuum above 10Mv/m.
Previous OPS DRVH: 11.8
Special Instructions:

Log Number: 4490236Logbook(s): 

• ELOG
• RADLOG

Entry Makers: mockBody: 

Using this time when RF is down in the NL and SL to update the AutoBias on the I400 for the NDX detectors.

AutoBias Time used: today from 11:00 - 12:00
SL26 I400 capacitor was changed to 1000pF at SME request. Thus the AutoBias time used for that I400 is from 12:10 - 13:10 to have an hour to acquire data at this cap setting.

Fig. 1 - 10) IN04, NL05, NL07, NL10, NL16, NL22, NL24, NL26, NL27, E4
Fig. 11 - 20) SL04, SL06, SL08, SL10, SL17, SL22, SL24, SL26, SL27, W4

Log Number: 4490234Logbook(s): 

• ELOG

Body: 

JLAB-PTW-6094 Rev 2 has been completed.

JLAB-PTW-10497 is now On Issue and will be used for any trim card swaps going forward.

Log Number: 4490232Logbook(s): 

• ELOG

Body: 

to facilitate an "apples to apples" measurement, the controller for IPM5C11A and IBCAD00 were turned off such that their infrastructure can be examined at an ambient steady state. as such, no further accesses are planned for today.

Log Number: 4490230Logbook(s): 

• ELOG

Entry Makers: michaelmBody: 

GGBBCs loaded and saved. Waiting on CED merger of workspace with new Ops drive highs, GSET.DRVHs, and Qos. In addition, AES-RF is hipotting both zones and making checks. Please leave zones off for now.

Log Number: 4490229Logbook(s): 

• ELOG

Body: 

Pre-job brief was completed, PTW is On Issue. Task approved by work supervisor.

Log Number: 4490228Logbook(s): 

• ELOG

Entry Makers: jhowardBody: 

Outside of 1L09, 1L12, and 1L13, all RF zones in the North, including 0L03 and 0L04 have been set to local to prevent any RF in the North once it is locked up.

Log Number: 4490227Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L15-6
Username: evonda
Date/Time: 04-21-26_13:29:43
RF Status: Good
Tuner Status: Good
Comment: Calibrated the AIB for Cavity 6 to eliminate the KBCU faults.
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4490226Logbook(s): 

• ELOG
• INCLOG

Body: 

IHA9E01 - lubricated the vertical rods and adjusted the speed to 1mm/sec., cycled the harp and there is less vibration on the harp carriage (https://logbooks.jlab.org/entry/4490225).

Log Number: 4490225Logbook(s): 

• ELOG
• INCLOG

Body: 

Applied more grease to the vertical rods and adjusted the speed to 1mm/sec.

Cycled the harp and noticed there is a lot less mechanical vibration with the carriage with a slower speed.

Log Number: 4490224Logbook(s): 

• ELOG
• SRFPLASMA

Body: 

Removed system from 2L22 and set up on 2L26 to support post-plasma checks.
Replaced cable and head for ch.2, which appeared to be bad on 3/23/2026.
Readbacks via 2L26 C100 RF Expert screen.
***** ******
Removed system from 2L23 and set up on 2L24 to support post-plasma checks.
Readbacks via 2L24 C100 RF Expert screen
***** ******
Systems on 2L05 and 2L25 remain in place, as described below.
A reminder that 2L05 return BL is on ch.8 (DRADS05BSRF8), not 10.

Log Number: 4490217Logbook(s): 

• ELOG

Body: 

Bellows Protectors are Reset at Girder's 2L03A, 2L04A, 2L25A, 2L26A; and AMGV Position Indicators are reset with New Triggers at VBV2L03A, VBV2L03B, VBV2L25A, VBV2L25B.

Log Number: 4490215Logbook(s): 

• ELOG

Body: 

Vacuum Group: 9S and BS Beamline are reconnected at MYBBS06; a Pre-Leak Check was done = Good (no leaks), will continue to pump down with Turbo Pump Cart and will Start VIP's tomorrow'ish.

Log Number: 4490214Logbook(s): 

• ELOG

Body: 

Vacuum Group: 9S and BS Beamline are reconnected at MYBBS06; a Pre-Leak Check was done = Good (no leaks), will continue to pump down with Turbo Pump Cart and will Start VIP's tomorrow'ish.

Log Number: 4490213Logbook(s): 

• ELOG

Body: 

ARC8 LOTO has been completed, and all associated paperwork is on issue.

Log Number: 4490210Logbook(s): 

• ELOG
• INCLOG

Body: 

IHA9E01 - preamp replaced (https://logbooks.jlab.org/entry/4490199)

Log Number: 4490209Logbook(s): 

• ELOG
• RFLOG

Body: COMMENTS: RFCM replaced for LOPW readback varying from 160 to 260mv vice 80-100mv


The following module files were successfully downloaded
sl096e sl096d

Log Number: 4490206Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-04-21 11:39:32 The output from the myRestore execution was as follows: iocsb4b systemEnum@2026-04-21 11:39 2(2) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocsb4b (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Procedure return status: Success

Log Number: 4490201Logbook(s): 

• ELOG

Body: 

Sounds good. No PTW attached, so I am presuming none needed. If one is needed, please attach it / comment it to this ATLis, and be sure it is on-issue before proceeding.