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 1
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 2
FNAL
NML facility ILC RF unit test Under construction
DESY
TTF/FLASH (DESY) ~1 GeV ILC-like beam ILC RF unit (* lower gradient)
STF (KEK) operation/construction ILC Cryomodule test: S1-Gloabal Quantum Beam experiment
KEK, Japan Cornell
CesrTA (Cornell) electron cloud low emittance
INFN Frascati
DAfNE (INFN Frascati) kicker development electron cloud
ATF & ATF2 (KEK) ultra-low emittance Final Focus optics KEKB electron-cloud
Global Cooperation for ILC Beam Demonstration
13/11/29 ILC Acc. Activity in Japan 3
ILC TDR Design
13/11/29 ILC Acc. Activity in Japan 4
Damping Rings Polarised electron
source
E+ 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
Access Tunnel Access Hall (Slope <10%)
Damping Ring Detector Hall Ring To Main Linac (RTML)
RTML turn-around
(Slope <7%)
(The background photo shows a similar site image, but not the real site.)
Surface Structures
PM-13
PM-12 PM-10
PM-8
PM-ab PM+8 PM+10
PM+12 PM+13
(Center Campus) PX
Kitakami-site cross section
- Need to establish the IP and linac orientation - Then. the access points and IR infrastructure - Then. linac length and timing
Kitakami Candidate Site
Site Specific Design to be carried out
13/11/29 5
ILC Time Line: Progress and Prospect
13/11/29 ILC Acc. Activity in Japan 6
Expecting: 3+2 year
KEK-ATF:Progress
13/11/29 ILC Acc. Activity in Japan 7
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
CY 2011 2012 2013 2014 2015 2016 2017 2018
ATF長期計画(案)
Gamma-gamma laser system R&D
High Field Physics
Nano beam orbit control (FONT
extension)
Develop.(2n
mBPM, Fast
FB) 2nm stab. R&D
Beam
study 2nm steady op.
Nano beam
orbit control
Beam
study
Challenging R&D of the Very high chromaticity optics Ultra small beam ~ 20 nm
Small beam
37nm
Steady op.
Develop. / beam study
4-mirror optical cavity
(LAL/KEK)
Gamma-
gamma
collider R&D
General R&D Ex) for KEKB; CSR, RF gun,
Instrument develop.,
Low emittance,…
Test beamline for detector?
Delay by fire and earthquake
Application
Next KEK Roadmap GDE
ATF Future Plan
ILC others
8 13/11/29
S1-Global hosted at KEK: Global cooperation to demonstrate SCRF system
DESY, FNAL, Jan., 2010
INFN
and
FNAL
Feb.
2010
FNAL & INFN, July, 2010
DESY, May, 2010 March, 2010 June, 2010 ~
DESY, Sept. 2010
Successful global cooperation hosted by KEK with variety of SCRF cavity design
13/11/29 ILC Acc. Activity in Japan 9
STF2; SCRF ACCELERATOR PLAN AT KEK
CM1
Beam Dump
SC RF-Gun CM2a+2b
■ 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
CM0 BC
CM3a +3b,
Electron Gun Full Cryomodule s Undulators Detector
13/11/29 ILC Acc. Activity in Japan 10
Plan: - Multiple Cryomodule for system
study - In-house Cavity to be installed in cooperation with industry - Wide range application including Photon Science
Gradient achieved at KEK-STF: > ~ 35 MV/m Progress: > 90 %
Plan of STF R&D beyond TDR
CY2011 CY2012 CY2013 CY2014
TDR
Review
GDE
Functioning
CY2015 CY2016
TDR
11
ILC next-phase
Cryomodule (CM-1) Construction Operation
2014 or later
- cool-down
- cold-test
- beam-test
CFF
Cavity mass production R&D
STF
QB Construction Operation
TDR complete
ILC
CM-2a
Construction
13/11/29 ILC Acc. Activity in Japan
Beyond TDR toward ILC Construction
Further Works in Preparation Phase
main linacbunchcompressor
dampingring
source
pre-accelerator
collimation
final focus
IP
extraction& dump
KeV
few GeV
few GeVfew GeV
250-500 GeV
13/11/29 ILC Acc. Activity in Japan 12
• 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
ILC in Linear Collider Collaboration
ILC Acc. Activity in Japan 13
ICFA Chair: TBD
Program Adv. Committee PAC – Chair: N. Holtkamp
FALC Chair: Y. Okada
To prepare for the ILC project realization ・Detailed design study ・Cost-effective project realization
Physics & Detectors – H. Yamamoto
CLIC – S. Stapnes
Linear Collider Board LCB – Chair: S. Komamiya
ILC – M. Harrison - (Deputy) H. Hayano
Tech. Board
Acc. Design & Integration (ADI)
Technical Support
Linear Collider Collab.
LCC Directorate - Director: L. Evans
Acc.
Phys. & Detector To be linked to LCC-Phys
Tech. S.
Deputy (Physics) – H. Murayama
Regional Directors - B. Foster (EU) - H. Weerts (AMs) - A. Yamamoto (AS)
KEK LC Project Office - A. Yamamoto
KEK
13/11/29
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 14
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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backup
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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 Beam test
STF2- CM1+CM2a
Beam test
STF-Future Extended program
CFS
Civil eng.
Site-survey
14 19
16 21
19 24
25 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
17
13/11/29 ILC Acc. Activity in Japan 18
KEK-ILC Preparation Organization, proposed (A. Yamamoto, November, 18, 2013)
Mechanical
Control & Comp.
Cryogenics
SRF
Conv. Facility, Siting
LCC -ILC
Safety
Electrical
Acc. Design & Integr.
Sources
D.R.
RTML & B.D.
Main Linac
BDS
MDI
System Tests ATF2, STF2, & STF-COI
Physics-Detector
KEK-LC
Accelerator
Phys. WG
R&D WG
Computing &
Network
Others
MDI
BDS
KEK-ILC Project & Technical Management
Tech. Baseline: Schedule: Cost, EDMS: Communication:
A. Yamamoto
KEK LC Project Promotion Committee
Acc. Tech
KEK ILC Project Preparation Center Directorate
Cavity Integration
13/11/29 ILC Acc. Activity in Japan 19
• 9-cell resonator
• Input-coupler
– TTF-III coupler
• Frequency tuners
– Blade tuner
• He tank
• Magnetic shield
– Inside He tank
20
Legend
Toward coupler side Toward pick-up side coupler side motor side
top
bottom
Driving unit support elements are already installed on the tuner halves.
Preassembled parts
13/11/29 ILC Acc. Activity in Japan
Plug-compatible Conditions
Plug-compatible interface established
Item Varieties Baseline
Cavity shape TESLA / LL TESLA
Length Fixed
Beam pipe flange Fixed
Suspension pitch Fixed
Tuner Blade/ Slide-Jack
Blade
Coupler flange (cold end)
40 or 60 40 mm
Coupler pitch Fixed
He –in-line joint Fixed
13/11/29 21 ILC Acc. Activity in Japan
TTF3/XFEL coupler
STF-2 coupler
TDR coupler
(1) Deep Technical Review of Input Couplers
13/11/29 ILC Acc. Activity in Japan 22