Recent Log Entries

Log Number: 4104994Logbook(s): 

• ELOG

Body: 

What does this mean for Operations? Will this be transparent to us or will 1L22 operate differently from the others zones? Will we need to run it any differently?

Log Number: 4104986Logbook(s): 

• ELOG

Body: 

https://logbooks.jlab.org/entry/4104806

Log Number: 4104985Logbook(s): 

• ELOG
• LERFLOG

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

Date : 01-05-23
Time : 07:12:10
Day : Thursday
Shift : Day

Crew Chief : Humphry
Program Deputy: Spata
Team : X
Arm : RadCon
Designated SSO: Christian
LERF Operator:
Operators : Christian

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

Log Number: 4104984Logbook(s): 

• ELOG

Body: 

Approved

Note: Cleanroom on 1L12 has been removed

Log Number: 4104982Logbook(s): 

• POLOG
• ELOG

Entry Makers: deirBody: 

EGG took a look at it on swing shift and gave the okay to adjust alarm limits, ~21:00.

GMES has been going up and down ever since. Slightly adjusted the LOLO to keep it from alarming.

Fig 3&4: Looks like it could be related to phase fluctuations.

Log Number: 4104975Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Deir
DATE:             01/05/2023
SHIFT:               Owl

The operator has read the following:

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

Log Number: 4104969Logbook(s): 

• ELOG

Entry Makers: ywanghoflerBody: 

Optimized beam up to Fcup # with HWien angle at -64.59 deg.
Established high current to Fcup #1:
Fig. 1---45uA, Laser A
Fig. 2---65uA, Laser C
Fig. 3---110uA ( A+ C)

Log Number: 4104968Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06

Saved: ywang 01-04-23 21:47:06 {A:3 B:5 C:5 E:1047 A=CW B=BS C=BS D=BS 0R08=0.00 0R08 dump in. dump(s) in.

Log Number: 4104967Logbook(s): 

• POLOG
• ELOG

Entry Makers: bschaumlBody: 

EGGxpert doesn't see any deleterious effects and gave the go-ahead to reset the limits.

Log Number: 4104966Logbook(s): 

• ELOG

Body: INJECTOR=>RF=>0L02=>0L02-8=>R028PMES has been disabled in alarm handler

0L02 off, PMES alarming

Log Number: 4104965Logbook(s): 

• ELOG

Body: INJECTOR=>RF=>0L02=>0L02-7=>R027PMES has been disabled in alarm handler

0L02 off, PMES alarming

Log Number: 4104964Logbook(s): 

• POLOG
• ELOG

Body: 
Record

Log Number: 4104963Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06

Saved: ywang 01-04-23 20:49:17 {A:3 B:5 C:5 E:1047 A=BS B=BS C=CW D=BS 0R08=0.00 0R08 dump in. dump(s) in.

Log Number: 4104948Logbook(s): 

• ELOG

Body: 

Mark and I ran repaired ARC3 power supply on a resistive load (2.33 Ohms) today up to 450A. Looking at the diagnostic waveform on NSH side @ 300A and 450A we see that the current sharing among all four NSH4 sections aren't equal rather NSH3 is running around 10% higher than rest of them. Please note NSH3 converter section is where we replaced the bad choke last year.

Tomorrow we will look into the PWM board because if the reference triangular voltage is higher then it will drive the IGBT harder and run higher current depending on the percentage off.

P.S.

Log Number: 4104944Logbook(s): 

• POLOG
• ELOG

Body: Spot Location: (10700.0,18500.0), Charge: 4.2000000000000004e-5

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

Log Number: 4104939Logbook(s): 

• ELOG

Entry Makers: xgomezgelhaarBody: 

Xavier and I verified cavity frequency was at 1497.100000Mhz after cooldown was complete. Measured at 4 and 5 pm. Stepper tuner program running and and cavity will be checked in the morning before stopping it and disabling tuner.

Log Number: 4104938Logbook(s): 

• POLOG
• ELOG

Body: *New Spot* Spot Location: (10700.0,18500.0)

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

Log Number: 4104931Logbook(s): 

• ELOG

Body: 

Ramp up is progressing. Restoration should be completed on 1/5.

One power supply failed (MQRAR03) and it's replacement is covered in a separate ATLis.

Log Number: 4104930Logbook(s): 

• ELOG

Body: 

Received a request to add a text alert if a 10Amp trim goes into MAJOR alarm.
Alerts will be sent to Jim Colman and Kevin Banks.
Restarted the alarm handlers at with the permission of the crew.

Log Number: 4104925Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: saver ran from opsl06

Saved: ywang 01-04-23 16:37:50 {A:3 B:5 C:5 E:1047 A=Tune B=Pulse C=Pulse D=BS 0R08=0.00 0R08 dump in. dump(s) in.