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Status of the ILC
Brian Foster (Oxford & GDE)
PECFA MeetingCERN 27/11/09
• I could pick many statements. Here are 2:• CERN Council Strategy Document:
– “It is fundamental to complement the results of the LHC with measurements at a linear collider. In the energy range of 0.5 to 1 TeV, the ILC, based on superconducting technology, will provide an unique scientific opportunity at the energy frontier.”
• OECD Science Ministerial Statement (2004)”– “..noted the worldwide consensus of the
scientific community, which has chosen an electron-positron linear collider as the next accelerator-based facility… endorsed the OECD GSF statement on ILC….”
Why the ILC?
B. Foster - PECFA - 11/09 2Global Design Effort
Why the ILC?
B. Foster - PECFA - 11/09 3Global Design Effort
• Ecm adjustable from 200 – 500 GeV
• Luminosity ∫Ldt = 500 fb-1 in 4 years
(corresponds to 2*1034 cm-2 s-1 )
• Ability to scan between 200 and 500 GeV
• Energy stability and precision below 0.1%
• Electron polarization of at least 80%
• The machine must be upgradeable to 1 TeV
Overall ILC Layout from RDR
1st Stage: 500 GeV; central DR et al. campus; 2 “push-pull” detectors in 14 mrad IR.
B. Foster - PECFA - 11/09 4Global Design Effort
GDE Structure
B. Foster - PECFA - 11/09 5Global Design Effort
SCRF-ML G-CFS AS
EU
AM
AS
ILCSC FALC
ILC-GDE Director
Regional Directors
Project Managers
AAP
PAC FALC-RG
Director’s Office= ~ Central Team
= ~ EC +
Experts
Project. M. Office- EDMS- Cost & Schedule- Machine Detector Interface- ILC, XFEL, Project X liaison- ILC Communications
BFMHKY
BB
CLIC PMEC~11;weeklyteleconf.
GDE R&D - the Technical Phase
B. Foster - PECFA - 11/09 6Global Design Effort
Major TDP Goals:• ILC design evolved for
cost / performance optimization
• Complete crucial demonstration and risk-mitigating R&D
• Updated VALUE estimate and schedule
• Project Implementation Plan (PIP)
Updated every six months
Available GDE resources
B. Foster - PECFA - 11/09 7Global Design Effort
• Resource total: 2009-2012
• Not directly included:– There are other Project-specific and general
infrastructure resources that overlap with ILC TDP
FTE SCRF CFS & Global AS TotalAmericas 243 28 121 392Asia 82 9 51 142Europe 108 17 64 189
433 55 236 724
MS (K$) SCRF CFS & Global AS TotalAmericas 18080 2993 6053 27126Asia 23260 171 5260 28691Europe 9890 921 530 11341Total 51231 4085 11843 67158
TDP Timeline
B. Foster - PECFA - 11/09 8Global Design Effort
SB2009 studies
2009 2010
RDR ACD concepts
R&D Demonstrations
TDP Baseline Technical Design
2011 2012 2013
RDR Baseline
Ne
w b
ase
line
inp
uts
TDR
TDP-1 TDP-2 ChangeRequest
Major R&D Goals for TDP1
B. Foster - PECFA - 11/09 9Global Design Effort
SCRF• High Gradient R&D - globally coordinated program to
demonstrate gradient by 2010 with 50%yield
ATF-2 at KEK • Demonstrate Fast Kicker performance and Final Focus
Design
Electron Cloud Mitigation – (CesrTA)• Electron Cloud tests at Cornell to establish mitigation
and verify one damping ring is sufficient.
Accelerator Design and Integration (AD&I)• Studies of possible cost reduction designs and
strategies for consideration in a re-baseline in 2010
SRF Test Facilities
B. Foster - PECFA - 11/09 10Global Design Effort
KEK, Japan
DESYFNAL
TTF/FLASH~1 GeVILC-like beamILC RF unit(* lower gradient)
NML facilityUnder constructionfirst beam 2010ILC RF unit test
STF (phase I & II)Under constructionfirst beam 2011ILC RF unit test
Other Test Facilities
B. Foster - PECFA - 11/09 11Global Design Effort
KEK, Japan
Cornell
INFN Frascati
CesrTA (Cornell)electron cloudlow emittance DANE (INFN Frascati)
kicker developmentelectron cloud
ATF & ATF2 (KEK)ultra-low emittanceFinal Focus optics
Key R&D - SCRF
B. Foster - PECFA - 11/09 12Global Design Effort
Key R&D – SCRF Global Plan
B. Foster - PECFA - 11/09 13Global Design Effort
Key R&D – Cavity gradient
B. Foster - PECFA - 11/09 14Global Design Effort
• Two-pass processing of cavities
•Yield at 31.5 M
V/m ~40%
Key R&D – 1st XFEL Cryomodule
B. Foster - PECFA - 11/09 15Global Design Effort
Key R&D – Cryomodule
B. Foster - PECFA - 11/09 16Global Design Effort
Key R&D – SCRF Future Strategy
B. Foster - PECFA - 11/09 17Global Design Effort
Key R&D – Beam Delivery
B. Foster - PECFA - 11/09 18Global Design Effort
ATF/ATF2 LayoutATF2 Goals• Test fast kicker magnet • Focus the electron beam to 35 nm in vertical• Stabilize the vertical beam position with 2 nm resolution
Optical Table of
the Shintake monitor
Key R&D – E cloud @ CESR
B. Foster - PECFA - 11/09 19Global Design Effort
Low-energy electrons
Beampipe
EM wave
Phase velocity changes in the ec region
SignalGenerator
Receiver
Amplifier
Isolator
BandpassFilter
180º Hybrid
Beam
Electron Cloud
Key R&D – CF&S & Rebaselining
B. Foster - PECFA - 11/09 20Global Design Effort
• Cost constraint in TDR– Updated cost estimate in 2012 6.7 BILCU– Need margin against possible increased component costs
• Process forces critical review of RDR design– Errors and design issues identified– Iteration and refinement of design– More critical attention on difficult issues
• Balance for risk-mitigating R&D– Majority of global resources focused in R&D– Important to prepare / re-focus project-orientated activities
for TDP-2
• Need for design options and flexibility– Unknown site location
• Rationale to move away from RDR:
Key R&D – CF&S & Rebaselining
B. Foster - PECFA - 11/09 21Global Design Effort
• Proposals:1. A Main Linac length consistent with an optimal
choice of average accelerating gradient– RDR: 31.5 MV/m, to be re-evaluated
2. Single-tunnel solution for the Main Linacs and RTML, with two possible variants for the HLRF
– Klystron cluster scheme– DRFS scheme
3. Undulator-based e+ source located at the end of the electron Main Linac (250 GeV)
– Capture device: Quarter-wave transformer
4. Reduced parameter set (with respect to the RDR)nb = 1312 (so-called “Low Power”)
Key R&D – CF&S & Rebaselining
B. Foster - PECFA - 11/09 22Global Design Effort
4. Approx. 3.2 km circumference damping rings at5 GeV
– 6 mm bunch length
5. Single-stage bunch compressor– compression factor of 20
6. Integration of the e+ and e- sources into a common “central region beam tunnel”, together with the BDS.
• GDE group co-chaired by BF and A. Seryi tryingto answer questions from experiments on how these changes will affect physics extraction, backgrounds etc.
Key R&D – CF&S & Rebaselining
B. Foster - PECFA - 11/09 23Global Design Effort
• RDR
layout
(not to
scale)
• SB2009
layout
(not to
scale)
Key R&D – RF Distribution
B. Foster - PECFA - 11/09 24Global Design Effort
• Klystron Cluster scheme:
Key R&D – RF Distribution
B. Foster - PECFA - 11/09 25Global Design Effort
• Distributed scheme:
Virtual ILC TOUR
B. Foster - PECFA - 11/09 26Global Design Effort
04/22/23 PAC Meeting, Pohang, Korea30/09/09 N.Collomb
Positron Main Dump line (after collision)BDS (e- side)
Heading towards I.P.
Electron RTML(coming from DR)
Positron Transfer LineHeading into DR
Transfer Tunnel branch
Electron Beam directionPositron Beam direction
I.P.(down here somewhere)
Central Integration – AD&I
ILC-CLIC cooperation
B. Foster - PECFA - 11/09 27Global Design Effort
• CLIC – ILC Collaboration has two basic purposes: 1. allow a more efficient use of resources, especially
engineers– CFS / CES– Beamline components (magnets, instrumentation…)
2. promote communication between the two project teams.– Comparative discussions and presentations will occur– Good understanding of each other’s technical issues is
necessary– Communication network – at several levels – supports it
• Seven working groups which are led by conveners from both projects
ILC-CLIC cooperation
B. Foster - PECFA - 11/09 28Global Design Effort
• Conclusions from CERN/CLIC/ILC management at CERN include:– Existing working
groups deemed success ; two more(damping rings & positron production) created
– Jean Pierre Delahaye (CLIC StudyLeader) has joined GDE EC, and BF (European Regional Director) has joined the CLIC steering committee.
– joint workshop in Sept/Oct. 2010; further joint management meetings.
–
• Joint general issues subgroup endorsed by ILCSC and the CLIC Collaboration Board – joint chairs M. Harrison (GDE) & P. LeBrun (CLIC).
ILC Governance & PIP
B. Foster - PECFA - 11/09 29Global Design Effort
FALC
American Governance
Asian GovernanceGDE
Governance
ILC-HiGrade Governance CERN Council
(Strategy group)
EU Legal Framework
ILCSC Siting
ILCSC
Communication
Cross-members
ILC Governance timetable
B. Foster - PECFA - 11/09 30Global Design Effort
1) FALC presentation – July 13th 2009 ✔
2) Albuquerque Sep 29 – Oct 3 – tentative conclusion on funding model – fractions per
partner, size of common fund etc. ✔
3) EC face-to-face ~ Jan. Oxford – conclusion on funding models, preliminary conclusion on governance model options
4) Beijing March/April 2010? – conclusion on governance model options
5) Write preliminary governance report and iterate May – June 2010
6) Present to and hope to get agreement from ICFA, ILCSC, PAC & FALC – June-July 2010?
7) Present at Paris ICHEP July 2010 – N.B. this is not a final report and no funding authority/government will be expected to sign off on it.
• ILC HiGrade Gov. meeting at lunchtime today on item 3)
ILC Cost – fact & fiction
B. Foster - PECFA - 11/09 31Global Design Effort
• RDR cost (value) = 6.62 B$ (US 2007)(+ 24M person-hours explicit labor ~ $1.4B) => $8B
• So why do you keep hearing ludicrous figures like $20B?• DOE accounting - Add some contingency (note GDE estimates
include some, but not all (DoE) contingency. It needs to be done item by item. (conservatively + 20%)
• Escalation to “then year dollars” using arbitrary inflation estimate This is the big factor that people use – escalating for ~ 15-20 years gives ~ 200%
• For the total project, this gives ~$20B+ (then year $$)
• But e.g. Japan has ~ 0 inflation!• US will never build the entire machine• GDE aims that savings from rebaselining will maintain RDR cost
in 2012
Summary and Outlook
• Enormous progress continues to be made in ALL of
the critical R&D areas essential to build affordable ILC –
particularly in SCRF. • Wider political arena being addressed through ILCSC
and FALC. • On schedule for submission of convincing & detailed
TDR end 2012.
B. Foster - PECFA - 11/09 32Global Design Effort
• Next steps rebaselining meeting in DESY next week
and AAP review in Oxford Jan 6 - 8.
• I hope to be able to report more progress to you at next PECFA meeting.