STF phase 2 plan H Hayano 09042008 STF

STF phase 2 plan H. Hayano, 09042008

STF phase 2 Accelerator Layout cavities: 2 capture cavities with short ILC-cross-section cryomodule + 26 cavities for ILC cryomodules cryomodule: 3 ILC cryomodules, 9 cavities, 8 cavities with SC-Quad+correction dipoles+BPM, 9 cavities power source: 10 MW MBK + bouncer modulator + Linear PDS + ATCA base LLRF e- beam by FNAL RFgun + IAP laser : 3. 2 n. C x 2625 bunches, 9 m. A, 5 Hz, will be accelerated up to 850 Me. V

Cavity preparation area, to install DESY/FNAL pre-tuning machine Laser room planned, to install IAP laser. STF phase 2 expansion of module assembly area, EP area, clean-room

STF Tunnel Layout New carry-in hall 新搬入口 with crane RF gun Capture cavity 12 m long Cryomodules (3 connected) modules (2 cavities) 12 m module will be transported by truck to the new carry-in hall, and crane down into tunnel.

X-ray generation experiment (compact light source accelerator ) inclusion in STF phase 2 Quantum Beam Accelerator X-ray generation experiment in 2012

Details of cavity process delivery (1) receiving inspection, surface repair (2) EP 1(150μm）, surface inspection, surface repair (3) anneal (750℃） (4) pre-tuning (5) EP 2(20μm）, antenna installation, 120℃ baking group１：inspection, surface inspection, repair：２ people group２：anneal and pre-tuning：２ people group３：clean room work, baking：２ people group４：preparation & dismounting for VT：２ people group５：VT：２ people total　10 people outsourcing (6) installation into VT-hanging support (7) VT（First） OK (≧ 35 MV/m) (8), (13) cavity dismount, Ar filling, transport for dressing NG (<35 MV/m) OK (≧ 35 MV/m) (8) Cavity dismount, surface inspection, repair (9) pre-tuning (10) EP 2(20μm）, antenna installation, 120℃ baking (11) installation into VT-hanging support (12) VT（second） NG (<35 MV/m) keep it for later process Process & measurement of １ batch ５ cavities：takes 17 weeks For 28 cavities：　６ batches　１０２ weeks 　 Assume workable 44 week in year, then takes 2 years and 4 months to complete.

新搬入口の場所 New Carry-in hall STF building STF tunnel

DESY-FNAL-KEK pre-tuning machine delivery in fall 2009

FNAL RF Gun System Fermilab will supply to KEK only the Gun Cavity and input coupler Delivery in March 2009 Compensator Magnet Gun Cavity Solenoid Magnet Coaxial coupler Cathode inserted ビーム here 28 SEP 07 FNAL-KEK L-Band RF Gun Cavity

Cold model BPM test at ATF Linac. TM 120 mode cavity BPM, frequency is 2. 04 GHz Typical beam sweep example Results: estimated resolution was ~0. 2µm @ 1 E 10 intensity by detected V-shape slope and electronics noise. ML BPM Y output (ADC counts) vs. beam Y position [µm] by stripline BPMs Problems: U-shape (not V-shape) by common mode mixture? or cavity tilt? . (or fault of design? ) Further study is planned in Autumn!!

Schedule under discussion STF　 CY 2008 2009 2010 4 -cavity test cryostat test 2011 cavity process & test Phase 2 1 module operation EP expansion preparation prep arati on RFgun from FNAL clean room expansion 12 m module assembly Laser room for RF gun Laser from IAP preparation New carry-in hall construction prep arati on cavity preparation area pre-tuning from FNAL 2014 Quantum beam accelerator X-ray generation experiment cavity fabrication preparation 2013 S 1 Global cool-down operation Infrastructure 2012 preparation application of new accelerator new radiation limit area Phase 2 3 module operation

Cost Estimation (Aug. 2007) STF phase 2 （total 32. 04 oku-yen, for 3 years） 　　　　　　beam source　　　 ： 4. 49 oku-yen 　　　　　　capture cavities　 ： 1. 00 oku-yen 　　　　　　cryomodules ： 12. 94 oku-yen 　　　　　　RF power source ： 3. 91 oku-yen 　　　　　　2 K-refregilator　 ： 1. 30 oku-yen 　　　　　　cavity process and test ： 3. 20 oku-yen （including outsourcing man power for 2 years） 　　　　　　Carry-in hall 　　　　　　infra-structure ： 2. 00 oku-yen ： 3. 20 oku-yen *This is Hayano’s cost estimation, which was intended to be sent to DG of KEK as a request of long-term KEK future plan from 2009. The amount of the request was not the same as described here. Contribution of other countries were not included, that is, all the construction to be done by KEK and Japanese industries.