Aggregator

Log Number: 4475221Logbook(s): 

• ELOG
• SRFLOG

Body: 

No major update.

Log Number: 4475218Logbook(s): 

• ELOG

Body: The following Bypassed Interlock had it's Expected Removal Date changed in the Accelerator Bypassed-Interlocks Log (ABIL) Previous Expected Removal Date: 22 Feb 2026 New Expected Removal Date: 30 Jun 2026 Who made the change: krylach Justification for the change: Still in progress.

Log Number: 4475217Logbook(s): 

• ELOG

Body: The following Bypassed Interlock had it's Expected Removal Date changed in the Accelerator Bypassed-Interlocks Log (ABIL) Previous Expected Removal Date: 31 Dec 2025 New Expected Removal Date: 30 Jun 2026 Who made the change: krylach Justification for the change: Still in progress.

Log Number: 4475216Logbook(s): 

• ELOG

Body: 

ODH sensor OM04 in CMTF was unbypassed after been adjusted. Performed global calibration for ODH sensor in CMTF. Also, calibration was applied to all sensors in Inj., NL, North Access Building, SL and South access building.

Log Number: 4475215Logbook(s): 

• ELOG
• LERFLOG

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

Date : 03-09-26
Time : 15:45:37
Day : Monday
Shift : Swing

Crew Chief : Richardson
Program Deputy: Schoene
Team : X
Arm : Shriner
Designated SSO: Shenenberger
LERF Operator:
Operators : Shenenberger, Shriner

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

Log Number: 4475213Logbook(s): 

• ELOG

Entry Makers: lrichardBody: 

Went ahead and entered the design setpoint for MXM3S03 to see if the shunt stayed in range with the new Coefficient already entered. Appears not to be current limited at the design setpoint.

Log Number: 4475212Logbook(s): 

• ELOG

Body: 

The increase in IIX1L02_gDsRt is strongly correlated with the NDX neutron channels at 1L05 - 1L11 with maximum at 1L07-1L08. Likely a field emission somewhere in that area, with the FE electron beam propagating along the beam line and hitting the IDX at 1L02

Log Number: 4475208Logbook(s): 

• ELOG

Body: 

1L12-6: Stellant Klystron that was installed 3/06/26 is serial number 228.

Log Number: 4475207Logbook(s): 

• ELOG

Body: 

The images from both LERF cameras were verified at the MCC, and the firmware was successfully upgraded. L. Krylach, S. Bruhwel, G. Aguilar

Log Number: 4475206Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L23-8
Username: kerns
Date/Time: 03-09-26_15:18:08
RF Status: Bad
Tuner Status: Good
Comment: Needs filament board replaced. Causing HV drops.
Special Instructions:

Maintenance Tag: Component: Filament Board

Log Number: 4475205Logbook(s): 

• ELOG

Entry Makers: kernsBody: 

Filament board was suspected to be bad back on Feb 12,2026 but was never replaced as DEIR stated in ELOG 4474925. It has been dropping HV due to filament readback problem which requires a new filament bd. that we didn't have one for replacement. It will run for a while if left in HV but eventually we need to get a C100 filament bd. in it so the HV will quit dropping !! Will also need to check new filament fiber or fiber to copper connections before it is taken out of HV.

Log Number: 4475204Logbook(s): 

• ELOG
• INCLOG

Body: 

Replaced Valve FSD Chassis for Hall C with upgraded spare.
After replacing found a missing ground issue that prevented correct readbacks for valve positions.
Fixed and showing good readbacks.
Tomorrow will continue further HCO/Troubleshooting in Hall C.

Log Number: 4475202Logbook(s): 

• ELOG
• SRFLOG

Entry Makers: michaelmBody: 

Now that global channel access is closed, please request channel access for the iocs listed for the zone you are working on opened if you do not already have suitable channel access to touch them. (Rf group, MAC, etc.)

Log Number: 4475201Logbook(s): 

• ELOG

Entry Makers: bbarkerBody: 

Even while bypassed, the mobile units' ODH alarm was sounding in the MCC rack room. Upon investigation, a 'Sensor Aging' warning seems to be the cause of the alarm.

Log Number: 4475200Logbook(s): 

• ELOG
• RFLOG

Tags: 

• Autolog

Body: 

The following cavity histories have been updated:
1L12-6
Username: holben
Date/Time: 03-09-26_14:58:17
RF Status: Bad
Tuner Status: Good
Comment: Replaced Klystron L3 #206 with Stellant #228. Waiting to be tested.
Special Instructions: , HPA breaker tripped

Maintenance Tag: Component: Tube {Removed SN: L3 #206, Replacement SN: Stellant #228}

Log Number: 4475197Logbook(s): 

• ELOG

Entry Makers: beneschBody: 

GMES sum didn't change from period before it was turned off. Higher gamma rate coincided with restoration of gradient. I believe the electrometer was supposed to be swapped today but I deleted the ATLis email so I can't be sure. Dose rate is back down now.

Log Number: 4475195Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: 

The following box supplies were TURNED ON AND CYCLED ONCE by version 2-16 of the Box Supply Cycling Script:
ARC1A Ramp Rate = 7.400 A/s
ARC3A Ramp Rate = 9.294 A/s
ARC5A Ramp Rate = 9.307 A/s
ARC9A Ramp Rate = 8.832 A/s
RSEP9A Ramp Rate = 4.865 A/s

Log Number: 4475194Logbook(s): 

• ELOG
• POLOG

Body: 

Moved Prep Chamber ion pump to a local gamma supply.

Started heating the puck in the oven. The initial temp is 23.6 C and vacuum is 0.4 nA.

Log Number: 4475193Logbook(s): 

• ELOG

Body: 

2L03 is back on HV. Resistor in CPS was found with signs of arcing and damaged insulation. Replaced resistor and dressed all wires around.

Log Number: 4475191Logbook(s): 

• ELOG

Entry Makers: mockBody: 

Received word from Operability that the LCW manifold was put back in place. The East Arc Box supplies are good for turn on. Arc 1, 3, 5, 9, and RSEP9.

Arc 7 still a no go due to YBBS06.

DC power has pulled out E-Stop on the affected box supplies so we can turn them on remotely.