45th ATF2 meeting

May 16 14:30- 16:40, Rm.725 bldg.3 at KEK.

1. First pulse calibration of QBPM, D. McCormick (SLAC)

file , pdf (17 pages, 572kB ) and ppt

2. Remote participation in ATF shift, A. Seryi (SLAC)

file , pdf (15 pages, 6.7MB ), ppt (5.8MB)

3. Updates on tracking through Q7 quad, F. Zhou (SLAC)

file , pdf (12 pages, 940kB ), ppt (1.8MB)

Kubo's comment : Dear Feng, (and All,)

I have a few comments on your presentation in ATF2 meeting today. I may misunderstand something. Please let me know if so.

I think you assumed perfect corrections (orbit, dispersion and coupling). In actual beam experiment, orbit and dispersion are corrected reasonably well. But coupling correction has not been done so well. It may be better if you look at (I believe you already did) and discuss on the emittance without the coupling correction.

Also, please note that our problem is abnormally strong intensity dependence of vertical emittance, not only a simple emittance growth. So, you may discuss vertical emittance growth depending on momentum spread and/or horizontal emittance (or something else depend on intensity).

2. KEK site meeting ( in Japanese )

R. Sugahara presented the schedule of installation of magnets, supports and alignment.

The next ATF2 meeting will be held on 23rd May 2007, 2:30pm -, 3-gokan, 725, KEK, TV-ID#=31110 with the KEK Gatekeeper and ILC Webex.