MuSR: 3He Refrigerator Document VI Cryogenic Control Logic

[JamesKingWork]

As a MuSR scientist, I would like the cryogenic control logic for the 3He Refrigerator to be correct and approved with cryogenics.

Acceptance criteria:

• VI Cryogenic Control logic is documented (on the dev manual)
• The logic is approved by the cryogenics team (or is edited to match what they expect)
• An estimate of time to implement the logic is given

Notes:

• 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]

Impeded waiting meeting for discussion with cryogenics on Friday. Documentation to discuss is attached here.

MuSR 3He Cryo Logic.docx

[JamesKingWork]

After talking to cryogenics on Friday there were a number of notable differences between my expectations from the VI and the realities of the device. I have updated the document and sent it to cryogenics to get feedback.

MuSR 3He Cryo Logic Attempt 2.docx

[JamesKingWork]

See docs. After a talk today with cryogenics they have approved the logic.

[KathrynBaker]

The docs make enough sense to me, and the progression of documents is visible in this ticket.