Aggregator

Log Number: 4490408Logbook(s): 

• ELOG

Body: 
Additional Comments:
5 UA IHWP In xA laser

Log Number: 4490406Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
Zone 2L03
Username: xgomez
Date/Time: 04-22-26_09:48:58
RF Status: Good
Comment: Macro Magnetics Transformer SN:3 removed. Replaced with Macro Magnetics S/N:4
Special Instructions:

Maintenance Tag: Component: CPS Components {Removed SN: 3, Replacement SN: 4}

Log Number: 4490405Logbook(s): 

• ELOG

Body: 
Additional Comments:
5uA xA laser HWP out

Log Number: 4490404Logbook(s): 

• POLOG
• ELOG

Body: 

Back in the late 1990s I did simulations of the effects of intensity modulation on the indicated positions for SEE BPMs. See attached from the beam instrumentation workshop in 2000. I did not take it out to 28 kHz but intensity modulation at that frequency will cause issues if you are using linac style BPMs. Transport style BPMs are under sampled at 28 kHz intensity modulation. It may be best to use a BCM cavity to confirm the frequency content and magnitude of intensity modulation at 28 kHz.

Log Number: 4490402Logbook(s): 

• ELOG

Body: 

Task approved by work supervisor.

Log Number: 4490398Logbook(s): 

• POLOG
• BTLOG
• ELOG

Body: 

More FFT spectra from four beams:

https://logbooks/entry/4490396

Log Number: 4490396Logbook(s): 

• POLOG
• ELOG

Entry Makers: suleimanBody: 

With 10 uA from Hall A laser to FC1 - Figure 1.
Figures 2-3: First three BPMs in Injector. There is the 20 kHz peak in x and y positions.

With 10 uA from Hall C laser to FC1.
Figure 4: First three BPMs in Injector. Very prominant peak at 28 kHz in all spectra.
Figure 5: with RTP OFF - no change.

With 10 uA from Hall B laser to PCup.
Figure 6: First three BPMs in Injector. Very prominant peak at 28 kHz in all spectra.

With 10 uA from Hall D laser to PCup.
Figure 7: First three BPMs in Injector. Overall noisy spectra.

Halls B and C show very large peak in wire-sum FFT at 28 kHz.

Log Number: 4490395Logbook(s): 

• ELOG

Body: 

No PTW is required. This task involves only reconnecting the fiber cable between two RFoF transmitters, which should take about 30 minutes to complete. If the Ops team thinks the gang phase issue has disappeared, this task will no longer be necessary.

Log Number: 4490393Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Barker
DATE:             04/22/2026
SHIFT:               Day

The operator has read the following:

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

Log Number: 4490391Logbook(s): 

• ELOG

Entry Makers: BpauleyBody: 

Carried out visual and operational inspections in HDR. All systems are operating normal at this time.

Log Number: 4490390Logbook(s): 

• ELOG

Entry Makers: BpauleyBody: 

Carried out visual and operational inspections in CHL1-2. Found ceiling lamp lens/cover is not secured properly & hanging by one hinge.

Log Number: 4490382Logbook(s): 

• ELOG
• LERFLOG

Body: 
THOMAS JEFFERSON NATIONAL ACCELERATOR FACILITY
ACCELERATOR OPERATIONS CREW CHIEF SIGN IN FORM

Date : 04-22-26
Time : 07:16:45
Day : Wednesday
Shift : Day

Crew Chief : Blackshaw
Program Deputy: Ogur
Team : E
Arm : RadCon
Designated SSO: Barker
LERF Operator:
Operators : Barker

This stamp certifies that the above Crew Chief has read/reviewed/received the following:

Log Number: 4490381Logbook(s): 

• ELOG

Tags: 

• BeamAccounting

Body:  Accelerator PHYSICS STUDIES RESTORE ACC DOWN OFF (SAM) Planned 0 0 0

Log Number: 4490380Logbook(s): 

• ELOG
• RFLOG

Entry Makers: msmithBody: 

Log Number: 4490379Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Destination Masking to: Inj500KeV
User: deir

Log Number: 4490378Logbook(s): 

• BTLOG
• POLOG
• ELOG

Body: 

Detector investigation (ok):
https://logbooks.jlab.org/entry/4490328

Mini spin dance and polarization with C laser:
https://logbooks.jlab.org/entry/4490349

C polarization: 89.1(8)%

Log Number: 4490377Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (13250,19250), Charge: 17.908261999999993

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