Status of ILC Activity in KEK

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Status of ILC Activity in KEK
APPI 03/10/2005

• H. Hayano, KEK

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• Official Time Schedule of ILC
• 2005.2 Decide the director and location of
  Central GDI
• 2005. Establish Regional GDIs
• 2005.8 Decide the design outline in Snowmass
  Workshop
• (acc.gradient, 1 or 2 tunnel, dogbone/small
  DR,
• egeneration etc)
• 2005 end Complete CDR with rough cost/schedule
• 2007 end Complete TDR, role of regions, start
  site selection
• 2008 Decide the site, budget approval
• 2009 Ground breaking
• 2014 Commissioning starts

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• Asian Organization for ILC Research
• ? LC Office in Japan
• F. Takasaki, K. Yokoya, H. Hayano, N. Toge, S.
  Yamashita
• ? Working groups in Asian region
• WG1 Overall design (K. Kubo)
• WG2 Main Linac (H. Hayano)
• WG3 Injectors (M. Kuriki)
• WG4 Beam Delivery System (T. Sanuki)
• WG5 HG Cavities (K. Saito)
• ? Facility (A. Enomoto)
• ? Site (R. Sugawara)

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• Critical Research Areas
• ? Establishment of the technology for
  accelerating
• gradient 35MV/m
• . Technologies for cost reduction
• . Technologies for mass production
• ? Pursuit of possible higher accelerating
  gradient
• . Larger operational margin of gradient
• . Wider possibility of site selection
• ? Beam technology development using KEK-ATF
• . Unique storage ring to reach ILC emittance
• . Make full use of ATF capabilities

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• Guiding Principle
• Global Point of View
• ? Time line
• ? Low cost design
• ? Effective use of RD budget by global
  coordination
• Regional Point of View
• ? Establish the leadership in leading areas
• ? Promote industrial level
• Time Scale
• ? Snowmass issues (Aug.2005)
• ? CDR issues (End of 2005)
• ? TDR issues (End of 2007)

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• Development of 45MV/m High Gradient Cavity
• ? Single-cell test in Dec 2004 - Mar 2005
• ? Individual vertical test of four 9-cell
  cavities
• by Sep.2005
• . Just in time for CDR completion
• . In existing facilities (AR east)
• . If expected performance not obtained,
• ? change to slower plan for ILC 2nd stage
• ? Cryomodule test by end of 2006 ? STF Phase 1
• ? Industrial design by TDR

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• Superconducting RF Test Facility
• Comprehensive Test Facility dedicated to
  ILC SC-RF RD
• 1. Superconducting Cavity
• fabrication, surface treatment,
  installation, vertical test / horizontal test,
• system test with beam
• 2. Cryomodule
• cavity installation, alignment,
  cryostat operation, heat cycle test, input
  coupler RD,
• tuner mechanism RD
• 3. Power source
• modulator development, klystron
  development, WG components
• 4. He plant
• High efficiency cryogenic system
• 5. Beam Instrumentation
• ILC beam generation, BPM, HOM,
  Low-Level RF control
• 6. Cavity Surface Treatment Facility
• BCP, CP, EP, HPR, clean room

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Location of Test Facilities
STF
KEK-B He Plant Control Center
JPARC Proton Linac Building Will be empty in
August 2005 Then, STF construction.
ATF
1) 60m x 30m building Klystron Gallery
(with extendable space) Cavity
installation room magnet power supply
room (with
extendable space) Control room (with
extendable space) Cooling water facility
AC power yard external Tent
House 2) 5m x 3.85m x 93.5m tunnel
Access hatch only 2m x 4.5m with
elevator (with extendable space)
L-band RD Stand
4 building
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• Purpose of STF
• ? Establish industrial design of Linac unit
  (35MV/m and 45MV/m)
• ? Promote Asian/Japanese industrial level for ILC
  component production
• ? Form Asian base for international collaboration
• ? Enlist/educate new comers

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Klystron Gallery
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Tunnel underground
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• STF Phase 1 (2005-2006)
• ? Cryomodule for 4 45MV/m cavities
• ? Cryomodule for 4 35MV/m cavities
• ? RF source and cryogenic system (mostly
  recycled)
• ? Electron beam and its diagnostics system
• ? Synthetic test of 35MV/m 45MV/m cryomodules
• with beam
• Other items in parallel
• ? Electro-polishing Facility
• . Can electro-polish cavities to be used
  overseas
• ? Cost reduction of cavity fabrication
  (Nb/Cu-clad,
• seamless)

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STF Test Accelerator
-------- phase 1 ------------------------ (RF
gun) (1.3GHz 1.5cell copper cavity 42MV/m,
3.2nC/bunch 3.2MW, 1ms
klystron, 5Hz) DC gun DC 200kV CsTe
photocathode for quick start UV(262nm)
Laser (337ns spacing, 2820bunches) Test
Cryomodule 4x 9cell TESLA SC
cavity (5m cryomodule), 35MV/m 4x 9cell
LL SC cavity (5m cryomodule), 45MV/m
4x 350kW 4x 450kW 3.2MW, 1.5ms
klystron, 5Hz Beam analyzer energy analyzer,
emittance, BPM -------- phase 2
------------------------ Accelerating Unit
3 set of 17m full-size (12 cavities)
cryomodule 2x 10MW, 1.5ms
klystron, 5Hz
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STF Infra-structure
EP build new EP(Electro chemical Polishing)
facility HPR move High Pressure Rinse from
L-band test stand Clean room build
new clean room for cavity assemble Vertical Test
Stand build new stand,
deep enough for superstructure
cavity Coupler Test Stand 5MW,
1.5ms klystron, 5Hz (switch
use between Test Cryomodule ) He Plant 600W at
4K plant moving from AR-East building
(adding new 2K system )
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Conceptual design of cryomodule
STF Phase 1
Valve Box
Why two module and connection? -gt5m carry
hatch, -gtEstablish weld connection in tunnel.
Weld connection
35MV/m TESLA design cavities
45MV/m Low-loss cavities
Become to 8 cavities in one cryostat Like TTF
cryomodule
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DESY
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Preliminary design of cryomodule whole assembly
35MV/m TESLA design cavities
45MV/m Low-loss cavities
Single cryostat operation (option)
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Cryomodule Cryostat Design
KEK cryomodule cross-section Design is underway
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STF Modulator, klystron plan
1. Buy 5MW Thales Klystron, Build Pulse trans,
Modify PNC Modulator putting bouncer circuit in
it.
For driving cavities Input coupler Test stand,
later for RF-gun.
PNC modulator
TH2104C
Additional PTBouncer circuit allows to use
TH2104C.
2. Build one more modulator (ILC spec.) for
cavity driving (in 2006). start
investigation of technology for bouncer
modulator/IGBT modulator.
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STF Phase 1 Beam Line Plan
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• STF Phase 2 (2007-2009)
• ? 3 Cryomodules each containing 12 caviries
• (35 or 45MV/m)
• ? Reinforcement of RF and cryogenic systems
• ? Synthetic test with a beam
• Many uncertainties for Phase 2
• ? GDI will be functional by the time of detail
  design of Phase 2
• ? Collaboration/competition with TTF2/SMTF
• ? A few full-spec RF unit needed for TDR
  somewhere in the world
• ? STF Phase 2 is desired for Asian industrial
  level

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ILC Cryomodule
1m dia. Cryostat(17m length), 12 of 9-cell SC
Cavities
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ILC Multi-Beam Klystron
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• ATF
• ? Beam dynamics study (Fast ion instability,
  wiggler, etc)
• ? Development of diagnostics devices (Laser wire,
  cavity BPM etc.)
• ? Improvements of extracted beam (coupling,
  stabilization)
• ? Development and test of fast extraction kicker
• Extension of ATF Extraction Line ATF2
• (A) Small beam size
• (A1) Obtain sy 35nm
• (A2) Maintain for long time
• (B) Stabilization of beam center
• (B1) Down to lt 2nm by nanoBPM (cavity BPM)
• (B2) Bunch-to-bunch feedback of ILC-type
  beam
• (300ns interval)

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ATF
Mission generationconfirmation of LC low
emittance e- beam
ATF emittance goal was set to X emit2.5E-6( at 0
intensity) Y emit2.5E-8( at 0 intensity) 1 from
X
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ATF2 final focus beam line
Line 1 or Line 2 (depend on movement plan of
existing facility)
ATF DR
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• International Collaboration on ATF2
• ? Design study going on by international
  collaboration
• . Mini-workshops Dec.11 at KEK, Jan. 5 at
  SLAC
• . Completion of optics design in March
• ? Budget
• . Total 2.8 Oku Yen (floor, beamline,
  diagnostics)
• . Desirable to share the expenses among
  Asia, North America,
• Europe
• ? Present plan
• . Floor construction in summer 2006
• . Start operation in Jan. 2007

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END