Recent Log Entries

Downtime Incident CLOSED: Hall A Septum Magnet

Log Number: 3747889Logbook(s): Body: IDDescriptionPeriodCause7154Title:
Hall A Septum Magnet

Summary:
Change Polarity of Septum MagnetsDuration:
1 hour 41 minutes

Time Down:
06-Dec-2019 18:07

Time Up:
06-Dec-2019 19:

Unable to Re-Enable MQA4T08 Mismatch Alarm

Log Number: 3747879Logbook(s): Entry Makers: moserBody: 

Tried rebooting the ACC node of the alarm handler. Problem persists. Figure 1: Error message I get when trying to re-enable. Figure 2: Alarm handler bit in question I am trying to re-enable.

Hall Ion Chambers HV Found Off, Yet FSD Clear, Fallout of Overnight IOC Outage

Log Number: 3747863Logbook(s): Entry Makers: moserBody: 

Figures 1-5: As found. The FSD bit shown in Figure 5 I thought would be tripped in the event that the Hall A ion chambers lose HV.

Chain of events in control room -- Figure 2, got alarms on Hall A ion chambers. Was delivering CW. Brought up Figure 1: Saw all HVs on Hall A ion chambers zero. Figure 5: FSD bit clear, not masked at a higher level, as shown in Figures 3 and 4. So no FSD fault as expected.

Turning on HV as we need these ion chambers.

HV came back up without issue.

Follow-up Re: Downtime Incident CLOSED: Hall A Compton Dipole

Log Number: 3747862Logbook(s): Body: 

Jim Coleman and I checked out the supply. Multiple attempts had the supply tripping off at approximately 11.5% of rated output, due to either a DC Overload or Phase Imbalance fault, or both (nothing consistent). Diagnostic signals looked terrible. We locked out the supply, examined the Transistor Bank and SCR assemblies. After removing our locks, we tried to turn on the supply, it took cycling the main input power 3 times to clear immediate DC Overload faults. We finally got the supply on, got it up to 50% of rated output and monitored its operation.

Autolog save

Log Number: 3747844Logbook(s): Tags: Body: saver ran from opsl632

Saved: chumphry 12-06-19 17:37:37 {A:1 B:5 C:5 E:1050 A=CW B=CW C=BS D=CW 0R08=5.31 No dumps in.

Hall C He3 target motion screen

Log Number: 3747839Logbook(s): Entry Makers: beneschBody: 

for reference. Operational restriction descriptions will soon be better matched to this. Searching for target ladder gets a March 2017 screen. This one doesn't show up in search with any string I tried. It is the last link in figure 2.

Downtime Incident CLOSED: Repair/maintenance

Log Number: 3747823Logbook(s): Body: IDDescriptionPeriodCause7149Title:
Repair/maintenance

Summary:
Septum magnet work + various thingsDuration:
7 hours 43 minutes

Time Down:
06-Dec-2019 09:11

Time Up:
06-Dec-2019 16:54

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