PS-BGI Operational Readiness

Name: PS-BGI Operational Readiness
Start: 2021-02-18T09:30:00+01:00
End: 2021-02-18T10:00:00+01:00
Location: No location set

Thursday 18 Feb 2021, 09:30 → 10:00 Europe/Zurich

Description

Quick chat to figure out the final details for the PS-BGI instruments

64202946623

Hampus Sandberg

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Agenda

Important note: For the BGI setup we need beam in the PS + the BGI magnets at their nominal working point

NOTE: BGIH magnet has been running at ~80 A last couple of weeks, 176 A is the nominal. Check before first beam (OP)
- Both BGIH and BGIV magnets have been tested. BGIH working at DC, BGIV pulsing ok
Replacing HV crate at PR.BGI84 (New crate ready to be installed ~Feb. 22) (BGI team)
- Notified about impact and access next week at the same time as other accesses

BGI magnet orbit correction (Matt, Alex)

BGIH - use correction parameters from 2018
- Expect no major difference in these parameters caused by the renovated main magnets in the PS during LS2
BGIV - find parameters as soon as BPMs are working

Gas injection

Ar gas bottles missing in tunnel, issue with order. New urgent delivery requested.
Verify that the system is working, i.e. that it injects gas without disturbing the PS and the beam (OP)
- Check with Jose March 23 how to use the gas injection system
Check gas ionisation rate change inside the BGI with gas injection -> Requires beam (Hampus)

Calibration of timing (Hampus)

Check and calibrate timing as soon as first beam passes through the BGI instrument
- PIX.WRF should have a stable phase for a given beam derived from the PSB
- PPM property "delayFromRFwarningToFirstTurn_rfclock" is used to compensate for delay to first turn at the BGI + cable delays

BGI setup (Hampus)

Verify the functionality of the instruments: beam -> gas ionisation -> magnet/HV -> detector -> readout -> profile
Adjust instrument settings until we get a good profile

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