MuSR: 3He Refrigerator Implement Cryogenic Control Logic

[JamesKingWork]

As a MuSR scientist, I would like to be able to control the 3He Refrigerator.

Relies on logic being documented and approved from #6239 as well as communications being implemented from #6241.

Acceptance criteria:

• Approved logic is implemented in the IOC
• Relevant macros are available to configure the IOC (see the two setup VIs)
• Logic is tested sufficiently with the IOCTestFramework
• OPI is corrected to work with the new functionality
• If the IOC is restarted it should be able to work out what state it was in and continue recondensing If the IOC is restarted we presume we are in a temperature control state, not a recondensing state

Notes:

• An estimate of time should be found on MuSR: 3He Refrigerator Document VI Cryogenic Control Logic #6239.
• The 3He refrigerator is a Heliox/ITC503 based system
• LabVIEW VIs are at C:\LabVIEW Modules\Oxford Software\Muon Heliox

3He Refrigerator tickets:

• Document VI control logic: MuSR: 3He Refrigerator Document VI Cryogenic Control Logic #6239
• Implement control logic: MuSR: 3He Refrigerator Implement Cryogenic Control Logic #6240
• Communications: MuSR: 3He Refrigerator Communications #6241
• OPI: MuSR 3He Refrigerator OPI #6244
• Machine setup: MuSR: Discuss 3He Refrigerator Machine Setup #6242
• Testing on Device: MuSR: 3He Refrigerator Testing #6243

[JamesKingWork]

Confirmed with cryogenics and MuSR scientists that this is purely ITC503 and doesn't use ITC502s and ITC601s as the LabVIEW suggests

[JamesKingWork]

Do not implement autorecondensing as part of this ticket.

[rerpha]

Sticking this in impeded now as we're waiting for more info from cryogenics and for #6239 to be completed.

[JamesKingWork]

I am happy that we have enough of the cryogenic logic and communications correct that we can start implementing this

[rerpha]

note to self, I will need to sort out the tests to adapt to the fact that part 2 no longer exists

[rerpha]

recondensing seems to work now and WISH look to have managed one, but going to get some feedback before putting this in review to see if there are any niggles

[FreddieAkeroyd]

@rerpha have we had any feedback, is this ready for review?

[rerpha]

@rerpha have we had any feedback, is this ready for review?

I need to revisit it, recondensing wasn't working very well so need to book some time in the shutdown to test against the device again.