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KEK 訪問, 2008.12.15 M. Ross
KEK 訪問
Minimum Machine, CFS, Cavity 開発
AAP Review, つくば、2009.04 .17-21
M. Ross2008.12.15
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The ‘R & D Plan’ is our basis document explains activities
• Input from:– Project Managers– Regional Directors– Technical Area Group
Leaders (14 - 早野、大内、福田、久保。。。 )
• To be used by:– GDE (us)– Funding Agencies and
Leadership (FALC and ILCSC/ICFA)
– Review Panels– Partner projects and
institutions
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KEK 訪問, 2008.12.15 M. Ross
山本さま , ILC Project Manager :
• TDP R&D plan (Release 2, DRAFT)• FALC-RG に提出した TDP R&D Plan を再度、アッ
プデートし• 『 Release 2 DRAFT 』として、全ての TDP-GLs ま
で• 広く配布した (5/31). 今週の GDE Dubna meeting• の期間中に、再度、コメントを求め、 6/6 には、• Release 2 としての最終版をさらに広く配布する。• 皆様のご協力をお願いする。(随時改訂は行う – 6
months )。
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KEK 訪問, 2008.12.15 M. Ross
TD Phase 1• TD Phase 1 will conclude in mid-2010 with the
publication of the TD Phase-1 Interim Report. • The emphasis of TD Phase 1 is on:
– high-priority risk-mitigating R&D – (most notably the Superconducting RF linac technology) – and
– quantifying the scope for potential cost reduction of the current Reference Design.
• The end of TD Phase 1 will also see a re-baseline of the conceptual machine design, in preparation for more detailed technical design work in TD Phase 2.
• The re-baseline will take place after careful consideration and review of the results of the TD Phase 1 studies and the status of the critical R&D.
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KEK 訪問, 2008.12.15 M. Ross
TD Phase 1 Priorities:
• 1) Technical R & D:– SRF (Main linac technology)– Beam Test Facilities– Specialized R & D (components)
• 2) Cost reduction studies / Design studies• 3) Project Preparation (increases in TDP2)
– Communication, Reviews, Governance and Siting studies, Mass-production scenarios, Document preparation,…
何時も第一
R & D Plan explains both 1) and 2)
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KEK 訪問, 2008.12.15 M. Ross
2) Cost reduction studies / Design studies:
• Two Components:1. Technical Area Group Work Packages
– Within each group; managed by TA Group Leader– Goals Performance, Cost reduction, Design
Development…2. Minimum Machine Initiative
– Between Groups; managed by Nick / Ewan– Goal Cost Reduction through CFS scope
reduction– Good Potential
• Priority: Technical Area Work
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KEK 訪問, 2008.12.15 M. Ross
Minimum Machine Initiative• RDR の baseline はそのままにして、当面の study 目標としての machine を定義する必要• 2009 年中の study• TDP1 の終り( 2010 年 7 月)にむけて re-baseline
MM def MM studies
2009 2010
New baseline engineering studies
2012
RDR Baseline (VALUE est.)
横谷
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KEK 訪問, 2008.12.15 M. Ross
方針• Conceptual sketch のみ . (lattice の詳細のようなものはナシ)• 人的資源・時間が限られているので、できるだけ各選択肢の1つに絞る
横谷
Hopefully – the cost reduction achieved by each Minimum Machine item will exceed 0.1 B ILCU (mcr)
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KEK 訪問, 2008.12.15 M. Ross
Definition of Minimum Machine
• 物理からの要請( WWS document )は満たすこと( energy, luminosity はそのまま)
• overhead, margin, design conservatism は最小限にとどめる
• Categories– General layout ( e.g., DR の位置)– Technical component specs (e.g. 冷却水 )– Accelerator performance specs ( e.g., 電源数
の節約、許容誤差の見直し)
横谷
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KEK 訪問, 2008.12.15 M. Ross
advanced R&D for positron production at KEK:
• (discussion held at DESY on Thursday 2008.12.04, concerning the possible approach to advanced R&D for positron production at KEK, and in particular the proposal for a ‘conventional’ source for ILC)
1. Kuriki to prepare a technical presentation of e+ system parameters for the Accelerator Systems TAG leaders meeting to be held on 2009.02.04
2. Clarke to explicitly include the proposed KEK source-related R&D plans into the next release of the formal ILC Technical Design Phase R&D Plan– R&D Plan is our highest-level document – (unlike the Minimum Machine document, which is essentially an
internal document) Nick Walker
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KEK 訪問, 2008.12.15 M. Ross栗木
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KEK 訪問, 2008.12.15 M. Ross
CFS Goals / Mission:• Identify cost drivers, justify these and develop
alternates– High delta-T water cooling and single/double tunnel– ‘value-engineering’
• Develop design and support TA Groups– Extensions of RDR and support of Minimum Machine
Initiative– Extend sample sites beyond ‘RDR 3’
• Build global collaborative resource network– CLIC, Dubna, XFEL specialists
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KEK 訪問, 2008.12.15 M. Ross
Siting – • Lack of definite site weakens ILC project• ILC technical basis is conservative and very
strong– (although much R & D remains)
• ILC technology can be adapted to various linac configurations– (TESLA and RDR are 2 such configurations)
CFS Group Conclusion:• Adaptation should be studied and supported
through Technical R & D
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KEK 訪問, 2008.12.15 M. Ross
Example studies:1. XFEL – HV pulse cables (meeting 12.03-04)2. Klystron Cluster – Overmoded waveguide3. Distributed RF sources – mod-anode klystrons• Basic rule for such studies:
– Technical R & D in support of particular site configurations must be performed through a fully GDE-wide open global perspective
• Each participant, turn-by-turn should take part, as resources and capabilities allow
• R & D Plan must include explanations of these activities Please help with these explanations
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KEK 訪問, 2008.12.15 M. Ross
Cavity 開発
• Gradient remains our most challenging, most important R & D topic– (as defined in R & D Plan)
• What must we claim in 2010?• What will we be able to say in 2010?
• What is KEK’s role in gradient R & D?
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081209 ILC Global Design Effort
Why and How Plug-compatibility ?
• Cavity– Necessary “extended research” to improve field gradient,– Keep “room” to improve field gradient,– Establish common interface conditions,
• Cryomodule– Nearly ready for “system engineering”– Establish unified interface conditions,– Intend nearly unified engineering design– Need to adapt to each regional feature and industrial con
straint
16081209 ILC Global Design Effort
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KEK 訪問, 2008.12.15 M. Ross
Summary of WG3: Status and activities for S0 and S1 of ILC
Convenors: Detlef Reschke, Hitoshi Hayano, Hasan Padamsee
• The one vendor yields are quite encouraging progress for the 50% ILC yield goal for TDP phase I, except for the small number of tests (23) so far.
• The TDP phase I goal has been defined primarily as a process yield goal. – To eliminate cavity-to-cavity variations, the GDE may
wish to consider many repeated treatments on a select few good cavities.
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KEK 訪問, 2008.12.15 M. Ross
Summary of WG3: Status and activities for S0 and S1 of ILC
Convenors: Detlef Reschke, Hitoshi Hayano, Hasan Padamsee
• For the yield from multiple vendors, Jlab and DESY reported 48 tests on 19 cavities from 5 vendors (including one cavity fabricated by Jlab).
• From this data set, the yield for gradients > 35 MV/m is about 25%.
• Clearly there are many more variables to bring under control when dealing with many vendors.
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KEK 訪問, 2008.12.15 M. Ross
Qualification of Vendors
• Improving fabrication process– 2009 Priority
• How this can be done– 2008 Achievement
All Vendor Yield(A6, A7, A8, A11, A12, A15, AES 1- 4, Ichiro5, J2,AC115, AC117, AC122,
125, 126, Z139, 143)
0
0.2
0.4
0.6
0.8
1
1.2
>15 >20 >25 >30 >35 >40
Gradient (MV/m)
Frac
tionOne Vendor Yield
(A6, A7, A8, A11, A12, A15, AC115, AC117, AC122, 125, 126)
0
0.2
0.4
0.6
0.8
1
1.2
>15 >20 >25 >30 >35 >40Gradient (MV/m)
Frac
tion
48 Tests, 19 cavities ACCEL, AES, Zanon, Ichiro, Jlab
23 tests, 11 cavitiesOne Vendor
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KEK 訪問, 2008.12.15 M. Ross
TTC WG3 recommended tasks:• a) General characterisation of identified defects and suspicious
sites.• b) Summarizing analysis of optical inspection results of various labs
including quench field, and T-mapping results.
• a) More EBW samples with different EBW parameters and successive surface treatments.
• b) As far as possible (limited by the company’s interest in confidentiality of EB parameters) comparison of EBW techniques applied in different labs and companies correlated to quench fields and surface “irregularities”
• a) Comparison of yield due to field emission between different labs,• b) Find a common measure for field emission loading as well as
common definition for usable gradient
• a) Excitation of lower modes at KEK + DESY (other labs ??): Comparative data analysis
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TILC09 / AAP Review
• Friday 17 to Tuesday 21 April 2009 Tsukuba (downtown)– 5 days: 3 days of parallel sessions + open & closing
plenary
• Interim AAP review is PM’s highest-priority– Detailed in-depth critical review across entire project– Effectively a ‘parallel session’ running all three available
days
• Need discussion on additional parallel sessions– But they must be planned not interfere with Review.
• Plan for ~100 GDE participants– ~30-50 of which will be in review (at any one time).
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AAP Review
• Focus of AAP will based on our published R&D Plan activities– SCRF Main Linac technology
• S0, S1 (S1 global), S2, plug compatibility• …
– Beam Test Facilities• ATF, ATF2, CesrTA, DAFNE, KEK-B,…
– Special emphasis on electron-cloud• TTF/FLASH (S2-related)
– CFS• Other (sub-topics) will include
– Technical R&D not covered in above– Project Management issues– …
• Expect ALL of our TAG leaders to attend and make presentations– Draft agenda proposal being made by PMs in consultation with
AAP chairs.– Available for comment before Christmas
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AAP Review Preparation• Preparation started at ILC08
– Stated as part of charge / goals for workshop
• Real work starts now!
• AAP want to be well-prepared for review– Special website set-up with selected key documents / information to
specific themes of review– This will require your input– Proposed document submission to Max deadline 30th January– Please send PMs a list of proposed documents before then! (Early January)
• AAP plans to generate a list of questions that will guide our presentations
– We will be expected to answer them– When would these questions be available to us?
• Expect to have to supply something like 15 hours of presentation– Split approximately 50-50 between actual PowerPoint and
questions/discussion– Rule of thumb: understood not all presentations / topics will be equal.
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Other (parallel) TILC09 Groups
• We need to plan (useful) meetings in parallel to the review itself.• Plan for additional ~50 people in parallel sessions• Organise so that there is not critical overlap with required
participation in review itself.– Strawman plan in preparation
• Proposals for parallel themes welcome (send to PMs)• Some ideas:
– SCRF (perhaps up to two parallel groups)– ATF & ATF2 (proximity to KEK)– MDI (proximity to physics & detector groups)– General Accelerator Physics & Design group
• Would include minimum machine aspects, but not exclusively• System-wide discussions
– …?
• Note PMs unlikely to be able to attend– They will be stuck in the review for the duration