ILC Accelerator Activities in Japan Akira Yamamoto (KEK/LCC) to be presented by Hitoshi Yamamoto (Tohoku Univ./LCC) IRFU-ILC-Days, CEA-Saclay, 29, November, 2013 13/11/29 ILC Acc. Activity in Japan

ILC Activity and the Status in Japan ILC Technical Design Report has been completed, and KEK has been contributing to two major advanced technology of Nano-beam handling technology, by hosting Advanced Accelerator Test Facility (ATF) with international collaboration, Superconducting RF technology, using Superconducting Accelerator Test Facility (STF) ILC candidate site has been unified to be “Kitakami” site in northern 13/11/29 ILC Acc. Activity in Japan

Global Cooperation for ILC Beam Demonstration TTF/FLASH (DESY) ~1 GeV ILC-like beam　ILC RF unit (* lower gradient) CesrTA (Cornell) electron cloud low emittance STF (KEK) operation/construction ILC Cryomodule test： S1-Gloabal Quantum Beam experiment  DESY  FNAL  Cornell  INFN Frascati  KEK, Japan NML facility　ILC RF unit test Under construction　 DAfNE (INFN Frascati) kicker development electron cloud ATF & ATF2 (KEK) ultra-low emittance Final Focus optics KEKB electron-cloud 13/11/29 ILC Acc. Activity in Japan

ILC TDR Design e+ Main Linac Damping Rings Polarised electron source Ring to Main Linac (RTML) (including bunch compressors) e+ Main Linac e- Main Linac Parameters Value C.M. Energy 500 GeV Peak luminosity 1.8 x1034 cm-2s-1 Beam Rep. rate 5 Hz Pulse duration 0.73 ms Average current 5.8 mA (in pulse) E gradient in SCRF acc. cavity 31.5 MV/m +/-20% Q0 = 1E10 E+ source 13/11/29 ILC Acc. Activity in Japan

Site Specific Design to be carried out Kitakami Candidate Site Kitakami-site cross section Surface Structures PM-13 PM-12 PM-10 PM-8 PM-ab PM+8 PM+10 PM+12 PM+13 (Center Campus) PX Damping Ring Detector Hall Ring To Main Linac (RTML) e- Main Linac (ML) e+ ML RTML turn-around e- Source e+ Source Existing surface road Existing road Access Tunnel Access Hall (Slope <10%) (Slope <7%) (The background photo shows a similar site image, but not the real site.) Need to establish the IP and linac orientation Then. the access points and IR infrastructure Then. linac length and timing 13/11/29

ILC Time Line: Progress and Prospect Expecting: 3+2 year　 13/11/29 ILC Acc. Activity in Japan

ILC Acc. Activity in Japan KEK-ATF：Progress Ultra-small beam Low emittance : KEK-ATF Achieved the ILC goal (2004). Small vertical beam size : KEK ATF2 Goal = 37 nm, 160 nm (spring?, 2012) ~60 nm (April. 2013) at low beam current 13/11/29 ILC Acc. Activity in Japan

ATF Future Plan ATF長期計画(案) ILC others CY 2011 2012 2013 2014 2015 2016 GDE Next KEK Roadmap CY 2011 2012 2013 2014 2015 2016 2017 2018 ILC others Delay by fire and earthquake Nano beam orbit control Develop.(2nmBPM, Fast FB) Nano beam orbit control (FONT extension) Beam study 2nm stab. R&D 2nm steady op. Small beam Beam study Challenging R&D of the Very high chromaticity optics Ultra small beam ~ 20 nm 37nm Steady op. Gamma-gamma collider R&D Develop. / beam study 4-mirror optical cavity (LAL/KEK) Gamma-gamma laser system R&D High Field Physics Application General R&D Ex) for KEKB; CSR, RF gun, Instrument develop., Low emittance,… Test beamline for detector? 13/11/29

S1-Global hosted at KEK: Global cooperation to demonstrate SCRF system DESY, Sept. 2010 DESY, FNAL, Jan., 2010 Successful global cooperation hosted by KEK with variety of SCRF cavity design FNAL & INFN, July, 2010 INFN and FNAL Feb. 2010 March, 2010 DESY, May, 2010 June, 2010 ~ 13/11/29 ILC Acc. Activity in Japan

STF2; SCRF Accelerator Plan at KEK ■ Objective •High Gradient (31.5 MV/m) 　＝＞Demonstration of full cryomodule ・Pulse and CW operation (for effectuve R&D ・Better efficiency power sources ・SCRF electron gun ・Training for next generation s Plan: Multiple Cryomodule for system study In-house Cavity to be installed in cooperation with industry Wide range application including Photon Science Electron Gun Full Cryomodule s Undulators Detector BC CM0 SC RF-Gun CM1 CM2a+2b CM3a +3b, Beam Dump Gradient achieved at KEK-STF: > ~ 35 MV/m Progress: > 90 % 13/11/29 ILC Acc. Activity in Japan

Beyond TDR toward ILC Construction Plan of STF R&D beyond TDR CY2011 CY2012 CY2013 CY2014 CY2015 CY2016 ILC GDE ILC next-phase TDR TDR Review Beyond TDR toward ILC Construction TDR complete STF Operation QB Construction Operation 2014 or later cool-down cold-test beam-test Cryomodule (CM-1) Construction CM-2a Construction CFF Cavity mass production R&D Functioning　 13/11/29 ILC Acc. Activity in Japan

Further Works in Preparation Phase Accelerator Engineering Design Positron Source: Conventional source development as backup Damping Ring: Ultra low emittance beam, Undulators, 650 MHz SCRF RTML: residual magnetic field effect in long beam transport-line ML: Cavity integration, CM engineering for cost-effective industrialization BDS: Final focusing with nano-beam, alignment w/ tighter tolerance, and design update Beam Dynamics: Accurate lattice design based on the specific site CFS: Site specific work including Central Campus design and others EDMS: engineering based on the EDMS Red: Efforts to be reinforced in Japan 13/11/29 ILC Acc. Activity in Japan

ILC in Linear Collider Collaboration To prepare for the ILC project realization ・Detailed design study ・Cost-effective project realization ICFA Chair: TBD FALC Chair: Y. Okada Program Adv. Committee PAC – Chair: N. Holtkamp Linear Collider Board LCB – Chair: S. Komamiya Regional Directors B. Foster (EU) H. Weerts (AMs) A. Yamamoto (AS) Linear Collider Collab. LCC Directorate - Director: L. Evans Deputy (Physics) – 　H. Murayama KEK KEK LC Project Office A. Yamamoto ILC – 　M. Harrison - (Deputy) H. Hayano CLIC – 　S. Stapnes Physics & Detectors – 　H. Yamamoto Tech. Board Acc. Tech. S. Acc. Design & Integration (ADI) Technical Support Phys. & Detector To be linked to LCC-Phys 13/11/29 ILC Acc. Activity in Japan

Cooperation Anticipated among LCC, CERN, France, and Japan Nano-beam handling technology as a common subject for both ILC and CLIC, through ATF collaboration SCRF cavity integration technology, Specially on power couplers and tuners, as a common subject for both ILC and SPL for LHC injector upgrade, Cryogenic engineering Specially on handling of large amount of helium inventory, as a specially crucial in mountain region, Civil engineering study specially for the detector hall design, 13/11/29 ILC Acc. Activity in Japan

ILC Acc. Activity in Japan Summary Japan HE physics community will make its best effort to realize the ILC project to be hosted in Japan, The accelerator design and technology will be further optimized in coming few years, and the project should get “Green Sign” hopefully within a few years. Further detail engineering design and the site specific study is to be extended for the ILC project to be ready to go forward within a few years. 13/11/29 ILC Acc. Activity in Japan

ILC Acc. Activity in Japan backup 13/11/29 ILC Acc. Activity in Japan

ILC Time Scale required 12 13 14 15 16 17 18 19 20 21 22 23 24 25 ILC TDP/TDR ATF-II Beam test ATF-future Extended program STF QB STF2- CM1+CM2a STF-Future CFS Civil eng. Site-survey 30 ILC constr. Commissioning Fabrication Preparation for the project Preparation　for industrialization Fabrication and tests, preparation for installation Inst/commission. Installation After getting Green Sign、 ・Preparation for contract：　~ 2 years ・Construction period：　　　~ 10 years ・If the green sign given in 5 years、 　ILC to be realized by 2030

KEK ILC Project Preparation Center KEK-LC KEK-ILC Preparation Organization, proposed (A. Yamamoto, November, 18, 2013) A. Yamamoto KEK ILC Project Preparation Center Directorate KEK LC Project Promotion Committee KEK-ILC Project & Technical Management Tech. Baseline: Schedule: Cost, EDMS: Communication: LCC -ILC Accelerator Physics-Detector Acc. Design & Integr. Conv. Facility, Siting MDI Phys. WG Acc. Tech SRF BDS Sources Main Linac R&D WG Cryogenics D.R. BDS Computing & Network Electrical MDI RTML & B.D. Mechanical Others Control & Comp. System Tests ATF2, STF2, & STF-COI 13/11/29 Safety ILC Acc. Activity in Japan

ILC Acc. Activity in Japan Cavity Integration 9-cell resonator Input-coupler TTF-III coupler Frequency tuners Blade tuner He tank Magnetic shield Inside He tank 13/11/29 ILC Acc. Activity in Japan

ILC Acc. Activity in Japan Legend Toward coupler side Toward pick-up side coupler side motor side top bottom Preassembled parts Driving unit support elements are already installed on the tuner halves. 13/11/29 ILC Acc. Activity in Japan

Plug-compatible Conditions Item Varieties Baseline Cavity shape TESLA / LL TESLA Length Fixed Beam pipe flange Suspension pitch Tuner Blade/ Slide-Jack Blade Coupler flange (cold end) 40 or 60 40 mm Coupler pitch He –in-line joint Plug-compatible interface established 13/11/29 ILC Acc. Activity in Japan

ILC Acc. Activity in Japan (1) Deep Technical Review of Input Couplers TTF3/XFEL coupler TDR coupler STF-2 coupler 13/11/29 ILC Acc. Activity in Japan