LET: Meetings: Minutes for 2005 August 02
Attending: Representatives from LEPP, FNAL, LBL, and SLAC
Snowmass: PT presented his plans for Working Group 1 (the LET group) at Snowmass; the talk can be seen here. Gerry Dugan pointed out that the plan is to have a baseline design for costing purposes by the end of 2005, and that there are a number of decisions or recommendations which must be made in addition to the ones suggested by PT. Of main concern to him are decisions relating to the main linac lattice such as quad spacing and lattice strength, and also number of diagnostic stations. He would also like more consideration of the high-gradient cavities which typically have stronger wakefields. This led to a brief discussion of the state of wakefield calculations for the high-gradient models. Jeff Smith and Nikolay Solyak have tentative versions of the wakefield which are based on scaling from the TTC wakes presented by Zagorodnov and Weiland in this PAC-03 paper, but to the best of everyone's knowledge there is no detailed calculation yet.
Brief reports from the laboratories:
- Cornell: Several undergraduate students are studying the role of BPM resolution and beam jitter in the tuning of the main linac, and Jeff is looking at what happens when a BPM or corrector magnet fails. Jeff is also looking at the beam dynamics issues assuming low-loss cavities. Andy is supervising other students who are studying the longitudinal and transverse sensitivities of the 3rd generation bunch compressor design.
- FNAL: Kirti is completing studies of tuning sensitivities and looking at systematic effects; Nikolay is looking at the alignment sensitivity for high-gradient/high wakefield cavities.
- SLAC: Glen is continuing BDS tuning and alignment studies; Linda is working on feedback; Mark and PT have done some work on the "scarecrow" lattice file set.
Old Business: None.
New Business: There will not be a meeting on the 16th of August since that is the second day of the Snowmass meeting.
Next Meeting: Tuesday, 30 August 2005, 12:30 / 11:30 / 9:30.