Aggregator

Log Number: 4467630Logbook(s): 

• ELOG

Body: 

Let me know if you need software support for anything. So did all 4 channels fail, on each of the electrometers?

Log Number: 4467628Logbook(s): 

• POLOG
• ELOG

Body: 
Record

Log Number: 4467627Logbook(s): 

• ELOG
• RADLOG

Entry Makers: msmithBody: 

Log Number: 4467626Logbook(s): 

• ELOG
• INCLOG

Body: 

1/28/2026 DR BPM Work:
Began HCO for DR BPMs
IPMBS00 - No heartbeat detected for Cal Cell, reseated connector on the Cal Cell and reestablished heartbeat

Log Number: 4467625Logbook(s): 

• ELOG

Body: 

would like to swap the electrometer handling 1s01 and 1s02 today during dayshift.

Log Number: 4467622Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: High Voltage was turned off for:
R02
R03
R04
R12
R13
R14
R15
R16
R17
R18
R19
R1A
R1B
R1C
R1D
R1E
R1F
R1H
R1I
R1J
R1K
R1L
R1M
R1N
R1O
R1P
R1Q

Log Number: 4467621Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: RF was turned off in:
R02
R03
R04
R12
R13
R14
R15
R16
R17
R18
R19
R1A
R1B
R1C
R1D
R1E
R1F
R1H
R1I
R1J
R1K
R1L
R1M
R1N
R1O
R1P
R1Q

Log Number: 4467620Logbook(s): 

• ELOG
• POLOG

Body: 

Plans for today:

1. Measure the lasers circular polarization - now we are using the new HV driver. For this, we need a CA to the laser room for about 2 hours.

2. We have new EPICS PVs names for the new eight high voltages applied to the cell: update ALARM Handler, Hall A Gateway Channel Access, and any other application that uses the RTP HV PVs.

Log Number: 4467619Logbook(s): 

• ELOG
• POLOG

Body: 

- RTP HV Settings - as found:
https://logbooks.jlab.org/entry/4467498

- We are now using JLab HV Driver (old driver is off):
https://logbooks.jlab.org/entry/4467516

Log Number: 4467618Logbook(s): 

• ELOG
• POLOG

Body: 

Notes about the unused KD*P cell:
https://logbooks.jlab.org/entry/4467616

Log Number: 4467617Logbook(s): 

• SRFLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

Went into HV on second attempt.
ARC faults in cavities 1, 3, 4, 5 and 7 while turning on RF or tuning.
All cavities steady at 4MV/m GSET.
Cavities 3, 4, 5, and 7 required OLT

Log Number: 4467615Logbook(s): 

• POLOG
• ELOG

Body: 

Low Voltage and Beam QE scans show a good photocathode with max QE of 1.36%:
https://logbooks.jlab.org/entry/4467480

The transverse manipulator was re-engaged to its magnet:
https://logbooks.jlab.org/entry/4467378

Log Number: 4467614Logbook(s): 

• POLOG
• ELOG

Body: 

- Did beam QE scan - max QE 1.36%
- Connected new HV Driver to RTP Pockets Cell
- PQB beam study transmission test for Aperture A2 at 4 mm was unsuccessful - will fix issues today.

Log Number: 4467613Logbook(s): 

• SRFLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

Cav-1: Bypassed, not touching
Cav-2: steady at 4MV/m GSET
Cav-3: GSET 0, not touching
Cav-4: GSET 0, not touching
Cav-5: Steady at 3MV/m GSET after OLT
Cav-6: Bypassed, not touching
Cav-7: Steady at 4MV/m GSET
Cav-8: Steady at 4MV/m GSET

Log Number: 4467612Logbook(s): 

• SRFLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

All cavities recovered to 4 MV/m GSET.

Cav-2 recovered at first, then had ARC faults. Good after OLT.
Cav-3 required OLT.
Cav-6 struggling with phase and gradient loops. OLT did not help. Otherwise, stable at 4 MV/m.

Log Number: 4467611Logbook(s): 

• SRFLOG
• ELOG
• RFLOG

Entry Makers: msmithBody: 

OLT'd cavities 2 and 6. All cavities recovered to 4 MV/m.

Log Number: 4467610Logbook(s): 

• ELOG

Body: 

cavities were pretty far off from the machine frequency
cavity 1 - ~24 kHz
cavity 2 - ~15 kHz

tuned the cavities closer to machine frequency. increased the gradients in SEL to the set points from the last run
cavity 1 - 2.5 MV/m
cavity 2 - 10.09 MV/m

made sure drive level (GASK) and the forward power levels (CRFP) are similar to the ones from the last run

poff optimization was done after tuning the cavities. used the one button to recover the cavities into SELAP

Log Number: 4467609Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Smith
DATE:             01/28/2026
SHIFT:               Owl

The operator has read the following:

• ELOG
• PD Shift Plan
• Radiation Surveys for PSS Segments in Controlled Access
• PSS Log

Log Number: 4467608Logbook(s): 

• ELOG

Body: 

Jan 28th
- Tunnel Crack Repairs
- Hall C Scaffolding
- NL Rack Fan Repair

Jan 29th
- Tunnel Crack Repairs
- Drip Pan Installation

Log Number: 4467606Logbook(s): 

• ELOG

Entry Makers: ywangBody: 

MOLLER studies with A2 = 4 mm