1. 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

2. 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
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ILC Acc. Activity in Japan

3. 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
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ILC Acc. Activity in Japan

4. 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
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ILC Acc. Activity in Japan

5. 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
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6. ILC Time Line: Progress and Prospect
Expecting: 3+2 year　
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ILC Acc. Activity in Japan

7. 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
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ILC Acc. Activity in Japan

8. 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

9. 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 ~
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ILC Acc. Activity in Japan

10. 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 %
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ILC Acc. Activity in Japan

11. 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　
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ILC Acc. Activity in Japan

12. 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
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ILC Acc. Activity in Japan

13. 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
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ILC Acc. Activity in Japan

14. 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,
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ILC Acc. Activity in Japan

15. 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.
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ILC Acc. Activity in Japan

16. ILC Acc. Activity in Japan
backup
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ILC Acc. Activity in Japan

17. ILC Time Scale required12 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

18. 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

19. 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
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ILC Acc. Activity in Japan

20. 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.
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ILC Acc. Activity in Japan

21. 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

22. 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