GDE Report from Snowmass to a Baseline

1. GDE Report from Snowmass to a Baseline Barry Barish ILCSC Meeting Daegu, Korea 27-Aug-05

2. Chris Adolphsen, SLAC Jean-Luc Baldy, CERN Philip Bambade, LAL, Orsay Barry Barish, Caltech Wilhelm Bialowons, DESY Grahame Blair, Royal Holloway Jim Brau, University of Oregon Karsten Buesser, DESY Elizabeth Clements, Fermilab Michael Danilov, ITEP Jean-Pierre Delahaye, CERN, Gerald Dugan, Cornell University Atsushi Enomoto, KEK Brian Foster, Oxford University Warren Funk, JLAB Jie Gao, IHEP Terry Garvey, LAL-IN2P3 Hitoshi Hayano, KEK Tom Himel, SLAC Bob Kephart, Fermilab Eun San Kim, Pohang Acc Lab Hyoung Suk Kim, Kyungpook Nat’l Univ Shane Koscielniak, TRIUMF Vic Kuchler, Fermilab Lutz Lilje, DESY Tom Markiewicz, SLAC David Miller, Univ College of London Shekhar Mishra, Fermilab Youhei Morita, KEK Olivier Napoly, CEA-Saclay Hasan Padamsee, Cornell University Carlo Pagani, DESY Nan Phinney, SLAC Dieter Proch, DESY Pantaleo Raimondi, INFN Tor Raubenheimer, SLAC Francois Richard, LAL-IN2P3 Perrine Royole-Degieux, GDE/LAL Kenji Saito, KEK Daniel Schulte, CERN Tetsuo Shidara, KEK Sasha Skrinsky, Budker Institute Fumihiko Takasaki, KEK Laurent Jean Tavian, CERN Nobu Toge, KEK Nick Walker, DESY Andy Wolski, LBL Hitoshi Yamamoto, Tohoku Univ Kaoru Yokoya, KEK 49 members GDE Members Americas 16 Europe 21 Asia 12 ILCSC - Daegu, KOREA

3. Starting Point for the GDE Superconducting RF Main Linac ILCSC - Daegu, KOREA

4. 2005 2006 2007 2008 2009 2010 CLIC Global Design Effort Project LHC Physics Baseline configuration Reference Design The GDE Plan and Schedule Technical Design ILC R&D Program Expression of Interest to Host International Mgmt

5. From Snowmass to a Baseline 2005 Snowmass August September October November December WW/GG summaries Response to list of 40+ decisions All documented ‘recommendations available on ILC Website (request community feedback) Review by BCD EC BCD EC publishes‘strawman’ BCD BCD Executive Committee: BarishDugan, Foster, Takasaki Raubenheimer, Yokoya, Walker Public Review Frascati GDE meeting ILCSC - Daegu, KOREA

6. Baseline Configuration Document Review Process • BCD executive committee will monitor BCD progress • Review WG/GG summary write-ups (recommendations) • Review each question on the list of 40+ decisions • BCD EC will identify and solicit needed additional input • additional expertise from ILC / GDE community • Strawman BCD available mid-November • Presentation of strawman BCD at Frascati GDE meeting (Dec. 10-12) • Final agreed BCD to be documented by end of 2005 • Final BCD becomes property of ‘change control board’ in early 2006 • Begin the Reference Design to be completed by end of 2006 ILCSC - Daegu, KOREA

7. Review of Snowmass 670 Scientists attended two week workshop at Snowmass ILCSC - Daegu, KOREA

8. Self Organization following Technology Decision • 1st ILC workshop at KEK November 2005 • ILCSC forms 5 technical WG + 1 communications and outreach WG • WG1 Parameters & General Layout • WG2 Main Linac • WG3 Injectors • WG4 Beam Delivery & MDI • WG5 High gradient SCRF • WG6 Communications ILCSC - Daegu, KOREA

9. WG1 Parms & layout WG2 Linac WG3 Injectors WG4 Beam Delivery WG5 High Grad. SCRF WG6 Communications WG1 LET beam dynamics WG2 Main Linac WG3a Sources WG3b Damping Rings WG4 Beam Delivery WG5 SCRF Cavity Package WG6 Communications Evolution by Snowmass Birth of the GDE and Preparation for Snowmass ILCSC - Daegu, KOREA

10. WG1 Parms & layout WG2 Linac WG3 Injectors WG4 Beam Delivery WG5 High Grad. SCRF WG6 Communications WG1 LET beam dynamics WG2 Main Linac WG3a Sources WG3b Damping Rings WG4 Beam Delivery WG5 SCRF Cavity Package WG6 Communications GG1 Parameters & Layout GG2 Instrumentation GG3 Operations & Reliability GG4 Cost Engineering GG5 Conventional Facilities GG6 Physics Options Enter the GDE - Snowmass Birth of the GDE and Preparation for Snowmass Introduction of Global Groups transition workshop → project ILCSC - Daegu, KOREA

11. WG1 LET bdyn. WG2 Main Linac WG3a Sources WG3b DR WG4 BDS WG5 Cavity GG1 Parameters GG2 Instrumentation GG3 Operations & Reliability GG4 Cost & Engineering GG5 Conventional Facilities GG6 Physics Options GDE Organization for Snowmass Technical sub-system Working Groups Provide input Global Group ILCSC - Daegu, KOREA

12. Goals of the Snowmass Workshop • Recommendations for the Baseline Configuration • Identify - Alternative Configurations • Identify R&D • To support the baseline • To develop the alternatives • Priorities for detector R&D ILCSC - Daegu, KOREA

13. Guidance for Baseline Configuration Baseline: A forward looking configuration which we are reasonably confident can achieve the required performance and can be used to give a reasonably accurate cost estimate by mid-end 2006 in a “Reference Design Report.” ILCSC - Daegu, KOREA

14. What are Alternatives and Why? Alternates: Technologies or concepts, which may provide a significant cost reduction, improved performance (or both), but which will not be mature enough to used in baseline by end 2006Alternatives will be part of the RDR, will form an important element in the R&D program and are the key to evolving the design ILCSC - Daegu, KOREA

15. Baseline Configuration Document • Our ‘Deliverable’ by the end of 2005 • A structured electronic document • Documentation (reports, drawings etc) • Technical specs. • Parameter tables • … • A ‘printable / readable’ summary document (~100 pages) ILCSC - Daegu, KOREA

16. Structure of the BCD Summary-like overview for those who want to understand the choice and the why Technical documentation of the baseline, for engineers and acc. phys. making studies towards RDR ILCSC - Daegu, KOREA

17. Alternatives Section(s) NoteACD is part of the BCD ILCSC - Daegu, KOREA

18. Design Approach • Create a baseline configuration for the machine • Document a concept for ILC machine with a complete layout, parameters etc. defined by the end of 2005 • Make forward looking choices, consistent with attaining performance goals, and understood well enough to do a conceptual design and reliable costing by end of 2006. • Technical and cost considerations will be an integral part in making these choices. • Baseline will be put under “configuration control,” with a defined process for changes to the baseline. • A reference design will be carried out in 2006. I am proposing we use a “parametric” design and costing approach. • Technical performance and physics performance will be evaluated for the reference design ILCSC - Daegu, KOREA

19. Parametric Approach • Parametric approach to design • machine parameters : a space to optimize the machine • Trial parameter space, being evaluated by subsystems • machine design : incorporate change without redesign; incorporates value engineering, trade studies at each step to minimize costs ILCSC - Daegu, KOREA

20. Approach to ILC R&D Program • Proposal-driven R&D in support of the baseline design. • Technical developments, demonstration experiments, industrialization, etc. • Proposal-driven R&D in support of alternatives to the baseline • Proposals for potential improvements to the baseline, resources required, time scale, etc. • Develop a prioritized DETECTOR R&D program aimed at technical developments needed to reach combined design performance goals ILCSC - Daegu, KOREA

21. The Key Decisions Critical choices: luminosity parameters & gradient ILCSC - Daegu, KOREA

22. Making Choices – The Tradeoffs Many decisions are interrelated and require input from several WG/GG groups ILCSC - Daegu, KOREA

23. Gradient • Baseline recommendation for cavity - Standard TESLA 9-cell • Alternatives: • Low-loss, • Re-entrant • superstructure ILCSC - Daegu, KOREA

24. Gradient Gradient recommendation (WG5) • 8km @ 31.5 MV/m → 250 GeV • +7km @ 36 MV/m → 500 GeV Tunnel length for one 500 GeV linac (8+7)/0.7  21km ILCSC - Daegu, KOREA

25. Gradient (WG5 Justification) ILCSC - Daegu, KOREA

26. Gradient - Justification ILCSC - Daegu, KOREA

27. TESLA Cavity - Gradient Status Results from KEK-DESY collaboration single-cell measurements (in nine-cell cavities) must reduce spread (need more statistics) ILCSC - Daegu, KOREA

28. Cavity Fabrication ILCSC - Daegu, KOREA

29. Alternative Fabrication Techniques ILCSC - Daegu, KOREA

30. Improved Electropolishing ILCSC - Daegu, KOREA

31. Improved Cavity Shapes ILCSC - Daegu, KOREA

32. Cavity R&D Fabrication from large grain Nb discs May remove the need for electropolishing ( cost!) ILCSC - Daegu, KOREA

33. Since Snowmass • Summaries from Working Groups and Global Groups are posted on the ILC Website • Analysis and Recommendations of the 40+ Decisions posted on the ILC Website • GDE Executive Committee met at SLAC 22-Sept to assess Snowmass results, make plans to produce a “strawman” baseline by mid-November • Planning done in the context of organizational approach and structures for next year to produce the RDR ILCSC - Daegu, KOREA

34. ILCSC - Daegu, KOREA

35. Other Issues for ILCSC • Appointment letters have been sent to the three Regional Directors with terms through RDR • Machine Advisory Committee needed early 2006. Propose to ask three senior accelerator physicists to attend Frascati meeting and review the BCD. • Plans to proceed past RDR to a TDR • Anticipated transition from ILCSC to FALC for management and oversight of GDE (see Takeuchi letter to FALC Resource Board) • Expresssions of Intererest for Siting? Stategy / When ? • Plans toward an International Management Structure for the ILC ILCSC - Daegu, KOREA

36. 2005 2006 2007 2008 2009 2010 CLIC Global Design Effort Project LHC Physics Baseline configuration Reference Design The GDE Plan and Schedule Technical Design ILC R&D Program Expression of Interest to Host International Mgmt