(1) Synchrotron radiation profile (Kuroda) (transparencies, pdf, 4 pages, 287KB) * Mask size shold be less than 3.7 sigma_x / 19.0 sigma_y, otherwise SR light hits QD0 in opposite side. * We might have serious problem in our treatment of non-linear term in magnetic field of sextupole. (2) ATF2/optics (Kuroda) Comparison between GLC/NLC parameter and ATF2 parameter (transparencies, pdf, 3 pages, 144KB) * We have no parameter of ILC nor TESLA so far. * ATF2 and GLC/NLC have the same order of chromaticity. Vertical local chromaticity at QD is -26,000 and -57,000 in ATF2 and GLC/NLC, respectively. Residual chromaticity is about 10% of that at SF. * Design chromaticity at IP is 170 and 3 for ATF2 and GLC/NLC, respectively. This chromaticity does not make beam size at IP significantly larger. * ATF2 should be a very nice facility to demonstrate local correction scheme. * Vibration tolerance in ATF2 is almost same as that in GLC/NLC. * We should ask TESLA people vibration tolerance in cold machine. * We should study tolerance in field strength and position of magnets. (3) Synchrotron radiation profile and ATF2/BPM (Tauchi) (a) Estimation of synchrotron radiation profile at QD (transparencies, pdf, 6 pages, 1MB) (b) What shall we do with ATF2 beam? (transparencies, pdf, 10 pages, 3.2MB) * Set up cavity-typy nono-BPM and Shintake-monitor at IP. * We will demonstrate compact FF optics and controlling beam orbit at nano meter level. * In future, we will construct laser facility for photon linear collider to demonstrate collision between laser and ATF2-beam. * Position of final doublet will be stabilized with active mover so as to make beam position at IP well controlled. * Vibration of cavity type nano-BPM at IP will be monitored with laser interferometer. * To measure size and orbit of beam concurrently, Shintake-monitor and Nano-BPM will be set at IP and a few tens of cm away from IP, respectively. Beam size at Nano-BPM is ~um. We can measure beam orbit precise enough even if beam size is ~um. * Resolution of current Shintake monitor will be 60nm. We may need to use higher mode in laser cavity to measure 40nm beam size. * One design of ATF2 Layout -> is it compatible with future XTF? * Need to stabilize beam orbit within Nono-BPM dynamic range of 2-3um. Beam orbit stability is measured to be +/-5um (rms) in vertical direction. We have to study beam stabilization. (4) Tilt of floor at ATF beam-line (Masuzawa) (transparencies, pdf, 5 pages, 1.4MB) 2.5days data * Measurement starts at 10/22 21:30. * Daily variation in tilt is less than 1 micro rad. ( cf. it is about 4 micro rad at Tskuba B4) * No serious variation even after earthquake. (5) ILC-WS program * Conveners sent off e-mail to candidate spealers at 10/26 17:00. * Takahashi-san will give a talk about gamma-gamma. * Propos FF facility (ATF2) We have to make its significance much more clear.