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Minutes of AWAKE Spectrometer meeting, 29/Nov/2016
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Present: Aurelie, Bart, Fearghus, Lawrence, Matthew, Michele, Simon, Stefano,
Mirrors, optical line covers, cables - Stefano
- See slides.
Mirrors
- Dimensions and material fixed.
- Flatness fixed.
- Thickness set.
- Some quotes are in. Waiting on OptoSigma
-> Ask visiting optics expert on issue of unprotected mirrors.
-> Wait for sample tests.
-> Anyone know of other mirror companies ?
Blinkers around optical components
- Feasible around big mirrors; start with support design and then blinkers.
-> [Lawrence] Will it be okay without an enclosure from the 2nd big mirror to the door in the corridor ?
-> [Bart] Possibility to switch off some lights being looked at ?
-> [Lawrence/Simon] What type of bulbs ? For filtering. Bart to ask.
Cables
-> Is 10 plugs enough ? Looks to be
-> Need UPS for camera as manual says can be damaged when cooled and then warms up. Also PC ?
-> Michele to ask FESA people about experience with things under UPS ?
- Rack and cabling requests are done, including timing, power and ethernet.
-> Stefano to look into timing source with Lars.
Magnet/vacuum chamber and other equipment - Lawrence
- See slides.
- Magnet offset confirmed.
- Optical filter of few hundred dollars to accept only light we expect and reduce backgrounds. No reason not to try and see if this helps.
-> Look into purchasing.
-> Bart to check filter holder size and let Lawrence know.
- Asked for a quote for water cooler.
- Scintillator screen formulation failed
-> Talk to the company as we do not understand why and it is a bit worrisome.
DAQ - Michele
- See slides.
- Hardware for monitoring output.
- OASIS is 14 kCHF (for 4 channels) - early next year
-> What is early ?
- Rent scope at 250-300 CHF/month
- Needs to be networkable.
- Pool will be able to find a scope that will work.
- Scope is 4 kGBP; rack mount is 0.7 kGBP, if needed.
- OASIS can record timing and so we can go back and check this.
-> Check that the data can be automatically recorded in FESA.
- OASIS is roughly twice the cost, but reduces the risk that we are not aware of timing variations, even though we expect this not to occur.
-> Need to look when it is available, whether its data is easily stored and weigh up cost versus a scope.
Spectrometer description document
- Latest version with Lawrence who will update and then pass on to Stefano for updates. Not sure of when this needs to be done by but it is needed for engineering checks, etc.
AoB
- We thanked Bart for all his work and will miss him when he leaves. We will hear from him via e-mail, but this was his last meeting.
Next meeting Thursday 15 December at 12:00 in R1 or another room if something can be reserved ?
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