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Plan ahead for the GDE

Plan ahead for the GDE. Barry Barish ILC Consultations URA, Washington DC 12-May-05. Starting Point for the GDE. Superconducting RF Main Linac. “Target” Parameters for the ILC. E cm adjustable from 200 – 500 GeV Luminosity  ∫ Ldt = 500 fb -1 in 4 years

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Plan ahead for the GDE

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  1. Plan ahead for the GDE Barry Barish ILC Consultations URA, Washington DC 12-May-05

  2. Starting Point for the GDE Superconducting RF Main Linac ILC Consultations - Washington DC

  3. “Target” Parameters for the ILC • Ecm adjustable from 200 – 500 GeV • Luminosity ∫Ldt = 500 fb-1 in 4 years • 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 ILC Consultations - Washington DC

  4. TESLA Concept • The main linacs based on 1.3 GHz superconducting technology operating at 2 K. • The cryoplant, is of a size comparable to that of the LHC, consisting of seven subsystems strung along the machines every 5 km. ILC Consultations - Washington DC

  5. TESLA Cavity • RF accelerator structures consist of close to 21,000 9-cell niobium cavities operating at gradients of 23.8 MV/m (unloaded as well as beam loaded) for 500 GeV c.m. operation. • The rf pulse length is 1370 µs and the repetition rate is 5 Hz. At a later stage, the machine energy may be upgraded to 800 GeV c.m. by raising the gradient to 35 MV/m. ILC Consultations - Washington DC

  6. Reference Points for the ILC Design TESLA TDR500 GeV (800 GeV) 33km 47 km US Options Study500 GeV (1 TeV) ILC Consultations - Washington DC

  7. e- beam diagnostics e- beam diagnostics bunch compressor laser driven electron gun undulator photon beam diagnostics pre-accelerator superconducting accelerator modules TESLA Test Facility Linac 240 MeV 120 MeV 16 MeV 4 MeV ILC Consultations - Washington DC

  8. Experimental Test Facility - KEK • Prototype Damping Ring for X-band Linear Collider • Development of Beam Instrumentation and Control ILC Consultations - Washington DC

  9. Evaluation: Technical Issues ILC Consultations - Washington DC

  10. GDE – Near Term Plan • Organize the ILC effort globally • First Step --- Appoint Regional Directors within the GDE who will serve as single points of contact for each region to coordinate the program in that region. • Make Website, coordinate meetings, collaborative R&D, etc • Represent the ILC internationally • Represent the ILC internationally • Outreach to our community and beyond ILC Consultations - Washington DC

  11. GDE – Near Term Plan • Staff the GDE • Administrative, Communications, Web staff • Regional Directors (each region) • Engineering/Costing Engineer (each region) • Civil Engineer (each region) • Key Experts for the GDE design staff from the world community (please give input) • Fill in missing skills (later) Total staff size about 20 FTE (2005-2006) ILC Consultations - Washington DC

  12. GDE – Near Term Plan • Schedule • Begin to define Configuration (Aug 05) • Baseline Configuration Document by end of 2005 ----------------------------------------------------------------------- • Put Baseline under Configuration Control (Jan 06) • Develop Conceptual Design Report by end of 2006 • Three volumes -- 1) Conceptual Design Report; 2) Shorter glossy version for non-experts and policy makers ; 3) Detector Concept Report ILC Consultations - Washington DC

  13. GDE – Near Term Plan • What is the Conceptual Design Report • Include site dependence – 3 or more sample sites • Detector Design Concept / Scope (1 vs 2, options, etc) • Reliable Costs – strong emphasis during design on cost consciousness --- value Engineering, trade studies, industrialization, etc • This report will be the basis for moving on to a technical design to be ready before physics from the LHC establishes the science case. ILC Consultations - Washington DC

  14. GDE – Near Term Plan • R&D Program • Coordinate worldwide R & D efforts, in order to demonstrate and improve the performance, reduce the costs, attain the required reliability, etc. (Proposal Driven to GDE) ILC Consultations - Washington DC

  15. Oversight ILCSC GDE - Director ILC-Asia ILC-Europe ILC-Americas Regional Team Regional Director and Deputy Institutional ILC Managers for major instiutional members USLCSG communications Regional Funding Agencies FNAL ILC-FNAL Manager SLAC ILC-SLAC Manager TRIUMF ILC-Canada Manager Cornell ILC-NSF PI Lead Labs WP 1.FNAL WP 2.SLAC NSF-funded Institutions Work Package WP 1.ANL WP 2.BNL Canadian Institutions WP 3.FNAL WP 3.SLAC International/Regional Organization International Regional ILC Consultations - Washington DC

  16. ILC Design Issues First Consideration : Physics Reach Energy Reach ILC Parameters Luminosity ILC Consultations - Washington DC

  17. Working Parameter Set“Point Design” ILC Consultations - Washington DC

  18. GDE will do a “Parametric” Design Range of parameters design to achieve 21034 ILC Consultations - Washington DC

  19. Towards the ILC Baseline Design ILC Consultations - Washington DC

  20. TESLA Cost Estimate 3,136 M€(no contingency, year 2000) + ~7000 person years ILC Consultations - Washington DC

  21. Cost Breakdown by Subsystem Civil SCRF Linac ILC Consultations - Washington DC

  22. RF Accelerating Structures Accelerating structures must support the desired gradient in an operational setting and there must be a cost effective means of fabrication. ~17,000 accelerating cavities/500 GeV Current performance goal is 35 MV/m, (operating at 30 MV/m) Trade-off cost and technical risk. RF SC Linac ChallengesEnergy: 500 GeV, upgradeable to 1000 GeV ~Theoretical Max Cost 1 m Risk ILC Consultations - Washington DC

  23. Electro-polishing (Improve surface quality -- pioneering work done at KEK) BCP EP • Several single cell cavities at g > 40 MV/m • 4 nine-cell cavities at ~35 MV/m, one at 40 MV/m • Theoretical Limit 50 MV/m ILC Consultations - Washington DC

  24. Gradient Results from KEK-DESY collaboration must reduce spread (need more statistics) single-cell measurements (in nine-cell cavities) ILC Consultations - Washington DC

  25. New Cavity Shape for Higher Gradient? TESLA Cavity Alternate Shapes • A new cavity shape with a small Hp/Eacc ratio around • 35Oe/(MV/m) must be designed. • - Hp is a surface peak magnetic field and Eacc is the electric • field gradient on the beam axis. • - For such a low field ratio, the volume occupied by magnetic • field in the cell must be increased and the magnetic density • must be reduced. • - This generally means a smaller bore radius. • - There are trade-offs (eg. Electropolishing, weak cell-to-cell • coupling, etc) ILC Consultations - Washington DC

  26. Gradient vs Length • Higher gradient gives shorter linac • cheaper tunnel / civil engineering • less cavities • (but still need same # klystrons) • Higher gradient needs more refrigeration • ‘cryo-power’ per unit length scales as G2/Q0 • cost of cryoplants goes up! ILC Consultations - Washington DC

  27. Klystrons • RF power generation and delivery • The rf generation and distribution system must be capable of delivering the power required to sustain the design gradient: • 10 MW  5 Hz  1.5 msec • ~700 klystrons and modulators for 500 GeV • The rf distribution system is relatively simple, with each klystron powering 30-36 cavities. • Status • Klystrons under development by three vendors (in Europe, Japan, and U.S.) • Three units from European vendor (Thales) have come close to meeting spec. • Sheet beam under development at SLAC (cost reduction) • Modulators meeting performance spec have been built and operated (at TTF) for the last decade. ILC Consultations - Washington DC

  28. Klystron Development THALUS CPI TOSHIBA 10MW 1.4ms Multibeam Klystrons ~650 for 500 GeV +650 for 1 TeV upgrade ILC Consultations - Washington DC

  29. Towards the ILC Baseline Design Not cost drivers But can be L performance bottlenecks Many challenges! ILC Consultations - Washington DC

  30. Parameters of Positron Sources ILC Consultations - Washington DC

  31. Positron Source • Large amount of charge to produce • Three concepts: • undulator-based (TESLA TDR baseline) • ‘conventional’ • laser Compton based ILC Consultations - Washington DC

  32. ILC Consultations - Washington DC

  33. ILC Consultations - Washington DC

  34. ILC Consultations - Washington DC

  35. Strawman Final Focus ILC Consultations - Washington DC

  36. GDE – Near Term Plan • Organize the ILC effort globally • Undertake making a “global design” over the next few years for a machine that can be jointly implemented internationally. • Snowmass Aug 05 --- Begin to define Configuration (1st Step) • GDE Dec 05 --- Baseline Configuration document by end of 2005 • Put Baseline under Configuration Control • Conceptual Design of Baseline by end of 2006 • Include site dependence – 3 or more sample sites • Detector Design Concept / Scope (1 vs 2, options, etc) • Reliable Costs -- emphasis during design on cost consciousness --- value Engineering, trade studies, industrialization, etc • Coordinate worldwide R & D efforts, in order to demonstrate and improve the performance, reduce the costs, attain the required reliability, etc. (Proposal Driven to GDE) ILC Consultations - Washington DC

  37. Some issues regarding the GDE? • Make a truly International GDE • Create a common fund • Interact with all our communities • Interact / work with FALC? • Make steps toward central authority, rather than regional authority for GDE or successor. • Develop plan toward an international laboratory • Make a realistic and affordable design ready for construction by the time of LHC results ILC Consultations - Washington DC

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