Recent Log Entries
Hall C CANS system on, in laser controlled access
"Hall C: Laser Access Mode (CANS)"
Unable to Re-Enable MQA4T08 Mismatch Alarm
FSD Masking Tool: Successful Destination masking to: HallB,HallD
Downtime Incident CREATED: Hall A Septum Magnet
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.
"Hall A: 5 uA CW / Carbon 0.2%"
AutoLog - UNMasking Hall A Target Movement
AutoLog - Masking Hall A Target Movement
Downtime Incident CLOSED: Hall A Compton Dipole
Autolog save
QuickPic - Hall A : 5 uA CW / Carbon Hole
(slight delay) Hall D Radiator Change -> 3e-4 Amorphous, 180nA
FSD Masking Tool: Successful System UN-Masking for: BeamLossMonitor
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.
