MPS Minutes 20220616

MPS meeting minutes – June 16th – 2022

Present:HH, RC, KL, AD, AL, MR, MA, SR, BH Meeting commenced: 10am PT Meeting adjourned:

LIC0 trouble shooting
- EMBD:LIC0 indicated red on "installed" status. Maybe module wasn't seated properly?
- HH investigated this morning
- It's fixed but unclear how this happened. Maybe during FLASH update
- In future verify epics status after working on crate
- Check seated status, Argon, HV, PMT current readback
- Similar to optics ok, given set of detectors to be turned on. Maybe modification of the run permit
- Work request
- Amend document for seated status
- Calibrations
Argon flow started yesterday
Keiko updated signal PV in the alarm handler and archiver for former ELBT:PMT1A now ELBT:LICSP1 (spare channel)

the delay between stage 1 trip detection to stage 2
detect mode was fixed at 10us (plus some inherent delay through the FSD and timing system ~5us).
Delay is adjustable between 1us and 25us. Default is 10us.
Look for S2 trips. Log how many we get.
Brandon just started tuning and it tripped PMT1B causing S2. Dark current much higher?
EPICS indications for S1/S2 trips => Ricky to check what is indicated when at the moment and potentially adjust to avoid confusion
Maybe S1 and S2 LED.

anything since last week’s email?
Board modifications complete
Still need to update epics conversion factors
HH thinks the modified board will work for FLASH. Before I it can be install, Controls will need to change the conversion factors on

the EPICS screen. Basically all existing conversion need to be increased by 100.

Rod to let HH know who will be make the changes and HH will email the “updated” user manual.
Ricky to update the conversion factors.
FLASH to run next week

=> Brandon

The beam path restrictions are not really set up to make sure BLMs are running. Only checking HV for low-energy section
Can we implement this now for the medium and high-energy sections? Would this cause issues, when temporarily disabling detectors?

Contents