Tuesday, March 5, 2013 2:00pm EST
From Hall A Wiki
Last meeting: Thursday, December 6, 2012 10:00am EST
- Jason had done a study on the stress on a petal beamline. The study was not presented in detail but the result was that it should work with 4mm Al everywhere. KK is going to use this in the CAD to see if we have that much clearance between the coils and insulation and the scattered particle envelopes.
- Juliette passed force calculations to Jason, but there is some concern about the "self-force" of the coils because the forces are calculated for each segment, and so feel a force from the other segments of the same coil. The result for a TOSCA model of the Qweak centering force (36k lbs) was compared to an estimate of Paul Brindza's from 2002 (28k lbs) but Jim and Ernie had access to a more recent calculation which was 38k lbs, which is a lot closer. KK and Ernie are going to talk to Ricardo at the MIT meeting to ask him if he would be willing to do a calculation. Juliette is going to talk to Robin about how to get normal forces along the length from TOSCA to give to Jason.
- KK has a student (Tyler) who is putting the scattered electron envelopes for both ee (mollers) and ep (elastically scattered from the proton) into the SoldWorks model along with the coil model produced by Jason. He is going to use it to design the acceptance defining collimator, the second "cleanup" collimator and then look for the amount of clearance with the coils to investigate the "in-air" option using the petal beamline. They will use Jason's estimate of 4 mm from the stress study mentioned in (1).
- We will tentatively plan on having a meeting in 3 weeks on Tuesday, March 26 at 2pm EST to possibly see a presentation of the stress study, a resolution to the magnetic force issue and Tyler's envelopes as well as any other progress.