1. Title 2 nd X-band Accelerator Structure Design and Test-Program Collaboration Meeting Discussion with WebEx on March 17 between CERN and KEK W. Wuensch, G. Riddone S. Fukuda, T. Shidara, T. Higo, K. Ueno

2. Date is temporary assigned to be May 13~16 SunMonTueWedThuFriSat 5/45/55/65/75/85/95/10 5/115/125/135/145/155/165/17 5/185/195/205/215/225/235/24 5/255/265/275/285/295/305/31 Possible attendee CERN ７ -- ８ from CERN, + Uppsala, Finland, Saclay, … SLAC 2? KEK several from ACC division several from mechanical engineering center Vendor? It is better to have a support/acknowledgment from ICFA for example. Let us see what is good support for this workshop.

3. Agenda 1 Global scope –Welcome address by KEK –Road map of CLIC? Two beam or separate RF source … Walter –SLAC, US view? Structure design –Review of structure parameters for CLIC –Relationship with test structure parameters Fabrication (disk, quad, PETS) –Present situation and results –Detailed mechanical design on the quadrant –Problems and future study items

4. Agenda 2 High gradient experiment –Analysis of all high gradient data (Alexej) –Status of NLCTA, ASTA and Nextef experiments –Comparison of initial processing of the T18_VG2.4_Disk –Discussion RF high power test system –Status of NLCTA, ASTA and Nextef operation –RF sources and components –Possible future developments on RF sources High gradient strategy –Based on the high gradient test to date –Reconfirmation on the goal and time frame –Strategy on parameters of test structures –Strategy with disk-based/quadrant, with/without damping –Strategy with OFE and CuZr, heat treated or not, …

5. Tour to laboratories and workshops Fabrication –high precision machining and low power test area –CMM and other mechanical measurement area –Chemical treatment –Higashi’s setup for SLAC –Hydrogen furnace High power test –Nextef –Klystron assembly hall

6. Information User registration for staying at dormitory –http://www.kek.jp/uskek/eng/http://www.kek.jp/uskek/eng/ –We can help registration with your full name and e-mail address Secretary (ILC) –T. Shirakata: tomiko.shirakata@kek.jp Hotel to stay –KEK dormitory: reservation from 45 days ahead, outside hotel? To KEK –Narita  1.5h(bus)toTsukuba Center  0.5h(Taxi)toKEK Meeting room –Mainly at 4 th bldg meeting room with WebEx –Additional: 3 rd bldg 7 th, 711, etc.