Aggregator

Log Number: 4503155Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: victorc 05-23-26 04:24:40 {A:i B:5 C:3 E:345 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in. Autosave prior to restore.

Log Number: 4503154Logbook(s): 

• ELOG

Entry Makers: kpriceBody: 

With a recommended spot from CIS SME, and having notified the PD of program deviation, we are going ahead with the spot move procedure. Best case scenario, it reduces bleedthrough to a more acceptable level. At the very least we will move out of a QE hole in the wafer, which will improve beam quality elsewise.

Log Number: 4503153Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16989Title:
Hall B (down) Halo rates un-well, Hall D (willing for beam) ion chambers high w/ C beam running

Summary:
Attempting to find a solution to the bleed through issues we've been having.

Log Number: 4503152Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16991Title:
Performing a 'spot move' on the photo cathode

Summary:
In efforts to find some resolution to issues with bleed through, we are going to perform a 'spot move' IF after experts deem it as a reasonable troubleshooting s

Log Number: 4503151Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System UN-Masking for: IonChamber
User: victorc
Areas: HallD

IonChamber Devices:
IICAD00
IICAD00A
IICAD00B
IICAD00C
IIC5H00

Log Number: 4503149Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16990Title:
QE measurement

Summary:
Taking QEDuration:
13 minutes

Time Down:
23-May-2026 03:38

Time Up:
23-May-2026 03:51

Log Number: 4503148Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl632

Saved: victorc 05-23-26 03:50:50 {A:i B:5 C:3 E:345 A=BS B=BS C=BS D=BS 0R08=0.00 0R08 dump in.

Log Number: 4503147Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (13250,19250), Charge: 44.85495799999999

Laser Wavelength Atten Setting Laser Power Current HV PS Current QE PV Updated? Update Time/Reason Not Updated (nm) (W) (uA)</T

Log Number: 4503146Logbook(s): 

• POLOG
• ELOG

Body: 

Got a call about the persistent bleed-thru problems. Ops have exhausted all options and were unable to deliver acceptable beam.

Log Number: 4503141Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: System Masking for: CryoModule
User: dchri
Areas: NorthLinac SouthLinac

CryoModule Devices:
1L14
1L03
1L02
1L04
1L05
1L07
1L06
1L08
1L09
1L10
1L11
1L12
1L15
1L13
1L16
1L19
1L17
1L18
1L20
1L21
1L22
1L23
1L24
1L25
1L26
2L14
2L03
2L02
2L04
2L05
2L07
2L06
2L08
2L11
2L09
2L10
2L12
2L15
2L13
2L16
2L19
2L17
2L18
2L20
2L21
2L22
2L23
2L24
2L25
2L26

Log Number: 4503139Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16990Title:
QE measurement

Summary:
Taking QEDuration:
1 minute

Time Down:
23-May-2026 03:38

Time Up:
Category:

Log Number: 4503138Logbook(s): 

• HDLOG
• ELOG

Tags: 

• HarpScan
• Beamline

Body: 

y values aren't showing as much of a dip - results seem slightly better

Log Number: 4503135Logbook(s): 

• HDLOG
• ELOG

Tags: 

• HarpScan
• Beamline

Body: 

Harp Scan

Log Number: 4503134Logbook(s): 

• ELOG

Entry Makers: dchriBody: Bleed through from Hall C beam is creating an environment where we can not run beam to the halls. Log Entry https://logbooks.jlab.org/entry/4503063 may be helpful. Need expert guidance

Log Number: 4503133Logbook(s): 

• ELOG

Entry Makers: dchriBody: A phone call was attempted to Stutzman - CIS Pri oncall, but no contact could be made.

Log Number: 4503132Logbook(s): 

• ELOG

Entry Makers: dchriBody: Bleed through from Hall C beam is creating an environment where we can not run beam to the halls. Log Entry https://logbooks.jlab.org/entry/4503063 may be helpful. Need expert guidance

Log Number: 4503131Logbook(s): 

• HDLOG
• ELOG

Entry Makers: victorcBody: 

They approved of the 5C11 and 5C11B harp swipes. Starting theirs. Radiator masked, ion chambers masked, and sending 200 nA CW.

Log Number: 4503130Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 16989Title:
Hall B (down) Halo rates un-well, Hall D (willing for beam) ion chambers high w/ C beam running

Summary:
Attempting to find a solution to the bleed through issues we've been having.

Log Number: 4503129Logbook(s): 

• ELOG
• BTLOG

Body: 

Laser Used:

D Laser

Sigmas:

Peak 1 - x Sigma: 0.6267 Peak 2 - u Sigma: 0.4080 Peak 3 - y Sigma: 0.4012

Log Number: 4503128Logbook(s): 

• ELOG
• BTLOG

Body: 

Laser Used:

D Laser

Sigmas:

Peak 1 - x Sigma: 0.7961 Peak 2 - u Sigma: 0.7137 Peak 3 - y Sigma: 0.7822