MPSMinutes 20210520: Difference between revisions
Jump to navigation
Jump to search
| Line 18: | Line 18: | ||
= BLM HV trip (iseg) = | = BLM HV trip (iseg) = | ||
*Issue with BLM tripping during post-mortem test was never resolved. | |||
*No repsonse from iseg | |||
*We can try swapping the boards and see if trip still happens | |||
*Swap boards and addresses, then re-test | |||
*HH: Is there dial option on modules? | |||
*MR/AD: This needs change in IOC shell. HH to confirm. | |||
*Spare modules available? 12-16 channel modules purchase for ARIEL? | |||
= Ehall work = | = Ehall work = | ||
Revision as of 17:20, 25 May 2021
Present: MA, HH, KL, MR, RN, RC, AD, AL (recorder)
Second stage trip
- HH fixed issue with dumping the data
- Question regarding the following scenario: If we are running normally and someone hits the stop button for analysis. When the trip happens, the stop is bypassed. -> We should clear when jumping to stage 2.
- Logistics: Do we scan the status register all the time? This would be required to not get out of synch.
- RN: This is Intractable 2 masters problem as bit can be set by EPICS or firmware.
- EPICS should reset bit as soon as status change is detected?
- MR: We should be constantly scanning already.
- Second failure scenario for which response needs clarification: If we get a trip condition and everything is connected, however, the FSD or timing system does not send a trip? What if external trip signal is not send?
- Then we would not go to stage 2 and we do not trip HV
- MR: This scenario could happen if the cable between FSD breakout board going into event receiver is disconnected or malfunctioning.
- FSD goes to RF switch AND event receiver.
- After stage 1 trip we should add a timer (~15us wait should be sufficient), i.e., if no response is received, system should trip.
- These 2 problems are the last issues HH needs to resolve, then upgrade should be finished.
BLM HV trip (iseg)
- Issue with BLM tripping during post-mortem test was never resolved.
- No repsonse from iseg
- We can try swapping the boards and see if trip still happens
- Swap boards and addresses, then re-test
- HH: Is there dial option on modules?
- MR/AD: This needs change in IOC shell. HH to confirm.
- Spare modules available? 12-16 channel modules purchase for ARIEL?
Ehall work
- AL, MA finished re-routing high-energy cables and HH shortened and terminated cables on Tuesday, which took about 6hrs. Labels were attached
- AL to attach new labels on roof. Also for LEDs. AL to send HH list with required labels after meeting.
- MA, AL to finish Ar connections next Tuesday and get leak detector from Rick.
Fibre
- MA to do baseline tests next week
LED calibration
- AL to write sequence of operation as base for EPICS implementation.
- Parallel ramp up of all LEDs with PMTs at voltage