Minutes of 93rd FFIR/BDSIM and 15th ILC-Asia WG4 meeting on 2/9/2005

The 15th meeting was held on Feb.9 10:00 am at rm.425 bldg no.3.

http://lcdev.kek.jp/ILC-AsiaWG/WG4notes/
Feb. 9 10:00
Rm.425 bldg.3 at KEK.
(1) ATF2 proposal
    -Web site was launched
     http://lcdev.kek.jp/ILC-AsiaWG/WG4notes/atf2/index.html
    -responsible author from JAPAN
     Chapter 1: Overview
     T. Tauchi
     Chapter 2: Optics
     2.3 Beam Diagnosis
     S.Kuroda
     Chapter 3: Instrumentation
     3.1 Cavity BPMs
     Y. Honda
     Chapter 4: ATF extraction line & extraction line diagnostics
      4.1 Performance of the ATF extraction line
     K. Kubo 
     Chapter 6: Beam stabilization
     6.2 Alignment & stabilization hardware and procedures
     R.Sugahara
     6.3 Ground motion
     M.Masuzawa
     Chapter 8: Schedule of ATF2, TDR and ILC (3 pages)
     K.Yokoya
     Chapter 9: Cost estimation
     T.Tauchi
     Chapter 11: ATF DR performance with ILC train
      M.Kuriki
     Appendix: "Proposal of laser facility" (3pages)
      T.Takahashi

(2) ATF2 optics and instrumentation (Layout)
     - Tentative layout of Andrei's optics (Drawing S.Araki)
        http://lcdev.kek.jp/ILC-AsiaWG/WG4notes/meeting/2005/0209/atf2_andrei.jpg
     - chicane for e/gamma separation for laser-wire etc.
        http://lcdev.kek.jp/ILC-AsiaWG/WG4notes/meeting/2005/0209/kuroda.pdf
       * space : 0.3m -> 0.5m
       * magnetic field coupling between magnets ( bends and Qs, SQs ) ?
       * space for vacuum system
       * beam pipe diameter to be 1.6cm at RF-BPM. Wakefield may be  problem -> to Kanazawa, Hayano, SLAC
       * ensure the space for instrumentation  -- BPM (15cm long, 1.6cm  diameter), corrector, vacuum port,
       * check tolerance/accuracy of magnet positions for alignment and  tuning method -> to optics designers
       * For BBA , active mover useful for SQs at least. Confirm active  mover every at Qs or corrector?

(3) Magnets and PS (Kumada)
     http://lcdev.kek.jp/ILC-AsiaWG/WG4notes/meeting/2005/0209/kumada.pdf
     - length -> 1/2  (increasing magnetic field)
     - power supplies  ---  1ppm of  ripple  for all bends to be  verified by Deepa (UK).
     - common supplies ( how many divisions? ) with corrections or independent power supplies?
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Tomo SANUKI

The next meeting will be on 16 February, 2005,10:00 - at 3 gokan, 425 .