Aggregator

Log Number: 4474574Logbook(s): 

• ELOG

Body: 

Immediately pulls a DC Overload fault

Log Number: 4474573Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L15-3
Username: xgomez
Date/Time: 03-05-26_15:01:00
RF Status: Bad
Tuner Status: Good
Comment: Needs 2.5W amplifier for low drive. Spare amp staged at zone. Leave GSET 0.
Special Instructions:

Maintenance Tag: Component: 2.5W Amp

Log Number: 4474572Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned on in:
R14
R15
R17
R18
R19
R1A
R1B
R1E
R1G
R1H
R1I
R1P
R1O
R1N
R1M
R1L
R1K
R1J

Log Number: 4474571Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned on in:
R02
R03
R04

Log Number: 4474569Logbook(s): 

• ELOG

Entry Makers: chumphryBody: 

Log Number: 4474567Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Destination Masking to: Injector
User: chumphry

Log Number: 4474566Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned on in:
R2A
R2C
R2D
R2E
R2G
R2H
R2I
R2J
R2K
R2L

Log Number: 4474565Logbook(s): 

• ELOG

Tags: 

• Readme

Entry Makers: chumphryBody: 

Log Number: 4474564Logbook(s): 

• ELOG

Body: 

5th March work map:
- Hall C target 2A alignment;

6th March work:
- Training

Log Number: 4474563Logbook(s): 

• POLOG
• ELOG

Entry Makers: gramesBody: 

Mostly a quiet on-call week. There were a couple reported trips of the gun high voltage, once while on and shift later while ramping the gun to voltage. Carlos doesn't see any pre- or post- cursor sign in vacuum or decarad. Riad moved anode from bias to picoammeter and doesn't see any sign of FE. Marcy had increased the VIP1I03 threshold near the Wien filter to avoid trips with sudden current, however, the Wien's were off or small. Unfortunately, each gun trip results in a small loss ~0.1+% of QE.

Log Number: 4474562Logbook(s): 

• POLOG
• ELOG

Entry Makers: suleimanBody: 

With Newport powermeter as described in the linked entry. Used 3 mW to measure the circular polarization vs PITA. Then we measured both Hall A and D with IHWP OUT and IN.

The PITA scan was for values of -9000, -5000, -2000, +1000, +5000.

The results are summarized in the attach spreadsheet.

Log Number: 4474551Logbook(s): 

• ELOG

Body: 

Also reported in comments Video System issues are being investigated by SSG in collaboration with the vendor.

Log Number: 4474550Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
2L09-1
Username: kerns
Date/Time: 03-05-26_13:46:03
RF Status: Good
Tuner Status: Good
Comment: Reseated RFCM to correct Bad CMD Q's on cavity comm's.
Special Instructions:

Maintenance Tag: Component: Other

Log Number: 4474546Logbook(s): 

• ELOG

Body: 

All 8 FCC's have had 10dB pads installed on their forward, reflected and probe channels. The ECAL values in EPICS have been updated to reflect this change. Matt, Michael

Log Number: 4474542Logbook(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: 4474541Logbook(s): 

• ELOG

Body: 

PTW on-issue. Would like Hall D Work Coordinator concurrence before giving approval. From Accelerator POV, work should be completed prior to week of 3/23.

Log Number: 4474539Logbook(s): 

• POLOG
• ELOG

Entry Makers: suleimanBody: 

Why do we measure constant laser circular polarization versus PITA with 1 MOhm when the Mott polarization measurements showed that we loose a significant amount of electron beam polarization?

Matt Poelker thinks that we are saturating the signal on the scope with 1 MOhm input impedance. We are using 3 mW and the powermeter goes directly to the scope. We un-screwed the attenuator from the face of the powermeter.

This would be the right way to do it: Keep the attenuator on the front face. Connect the powermeter to the Newport unit and select a fixed scale of power (not Auto), e.g. 2 mW. Set laser power to half of the fixed scale unit. Then, use the analog voltage output from the back of the Newport unit and connect to scope with 1 MOhm input impedance. We can use the powermeter already available on the laser path and its EPICS controls.

Log Number: 4474534Logbook(s): 

• ELOG
• INCLOG

Entry Makers: ketchumBody: 

After consulting with with M.Drury from SRF, VIP2L03 slow and fast interlock trip points were preemptively raised by half a decade to get ahead of any issues that may arise during beam operations as a result of the slow leak

New trip levels
-Slow (1hr delay): 5e-7 torr
-Fast (3 sec delay for valves): 5e-6 torr

Log Number: 4474529Logbook(s): 

• ELOG
• SLOG

Tags: 

• Autolog

Body: restorelib 3.0.1 Target restore date was 2026-03-05 11:29:40 The output from the myRestore execution was as follows: iocha13 cryotgtloop_alarms@2026-03-05 11:29 104(104) restored cryotgtloop@2026-03-05 11:29 20(20) restored systemEnum@2026-03-05 11:29 2(2) restored Pause: 20 second(s) camonsave@2026-03-05 11:29 1(1) restored Execute: /usr/csite/certified/bin/ced2Epics -ced ced -A -i iocha13 (success) PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 PVs modified: 0 Proc

Log Number: 4474525Logbook(s): 

• ELOG

Body: 

Investigated sticking keys in the BSY key bank, lubricated all keys, and verified proper operation.