Aggregator

Log Number: 4542863Logbook(s): 

• HCLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4542856Logbook(s): 

• HDLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4542854Logbook(s): 

• ELOG

Body: Calibration ParametersHall:DTarget: 4.5x10-4 Al 40umPass: 5.5Note: Calibrated On:2026-Jul-11 10:12Calibrated By: alexsFile:D-2026-07-11_1012_4.5x10-4_Al_40um_Pass-5.5_High_Current.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4542835Logbook(s): 

• HCLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4542832Logbook(s): 

• HCLOG
• ELOG

Entry Makers: msmithBody: 

Starting at 30 then going to 50 soon

Log Number: 4542831Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: UNMasked Hall C Normal Target FSD

Log Number: 4542827Logbook(s): 

• ELOG

Body: Calibration ParametersHall:CTarget: Solid Tgt (C%)Pass: 5Note: SHMS 950A, -12.9degCalibrated On:2026-Jul-30 18:01Calibrated By: mmerzFile:C-2026-07-30_1801_Solid_Tgt__C___Pass-5.hcdIon ChamberExisting Setpoing (rads/hr)New Setpoint (rads/hr)

Log Number: 4542826Logbook(s): 

• ELOG

Tags: 

• Autolog

Body: Masked Hall C Normal Target FSD

Log Number: 4542821Logbook(s): 

• DCLOG
• ELOG

Entry Makers: kpriceBody: 

Voltage on this trim (SL27B18 ch 9) had become quite noisy over the last few days. We suspected it was contributing to the position oscillations and swapped the trim card. First swap showed minimal to no improvement in voltage stability, second swap looked a lot better. Fig 1 shows the condition degrading, fig 2 zooms in on the two swaps.

I've red-tagged the two cards I swapped out, though I don't know if they have anything "wrong" with them other than they don't like to play nice with the MDBs, which I can't really blame them for.

Log Number: 4542813Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17665Title:
Swapping MDB2L27H

Summary:
Checking to see if this card is the cause of the oscillation we are seeing in Hall B's positions. The voltage is in alarm and it seems to have started to get worse around swing shift.

Log Number: 4542811Logbook(s): 

• DCLOG
• ELOG

Entry Makers: jhowardBody: 

After recovering beam to Hall B, Hall B staff noted their positions were oscillating more than before. We can see the same movement in the 2E02 x-position and in the energy locks in the SL, both 2L20 with FFB on and 2L19 with it off. We will try to swap the card and see if that helps, but if not, we will run like this and continue looking for what is the cause.

Log Number: 4542810Logbook(s): 

• ELOG
• RFLOG

Entry Makers: msmithBody: 

HV did not come back right away. I went out to check for a breaker trip but found nothing out of the ordinary. The Comms screen off of the zone Combo screen was showing an AUXP fault. Tried clearing faults and bringing HV back one more time. Success. Zone recovered without issue after that.

Log Number: 4542808Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17664Title:
2L18 dropped HV

Summary:
2L18 dropped HV on auxiliary power supply fault.

Log Number: 4542807Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17665Title:
Swapping MDB2L27H

Summary:
Checking to see if this card is the cause of the oscillation we are seeing in Hall B's positions. The voltage is in alarm and it seems to have started to get worse around swing shift.

Log Number: 4542806Logbook(s): 

• ELOG
• RFLOG

Entry Makers: kpriceBody: 

Attempting a local reset, may have to wait this one out like we have before.

Log Number: 4542800Logbook(s): 

• ELOG

Body: IDDescriptionPeriodCause 17664Title:
2L18 dropped HV

Summary:
2L18 dropped HV on auxiliary power supply fault.

Log Number: 4542787Logbook(s): 

• HBLOG
• ELOG

Entry Makers: kpriceBody: 

Reduced fudge factor from 0.25 -> 0.1 and restored period from 3 -> 5 to try and get position oscillations under control. It's for sure coming from upstream, I'm just trying to prevent the lock from overcorrecting and making it worse. No difference so far; I'm going to keep poking around.

Log Number: 4542782Logbook(s): 

• HDLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4542780Logbook(s): 

• HDLOG
• ELOG

Entry Makers: msmithBody: 

Log Number: 4542776Logbook(s): 

• ELOG
• LERFLOG

Body:  ACCELERATOR OPERATOR SIGN IN FORM OPERATOR:    Price
DATE:             08/14/2026
SHIFT:               Owl

The operator has read the following:

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