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ILC Accelerator R&D at Fermilab

Robert Kephart ILC Program Director. ILC Accelerator R&D at Fermilab. Outline. Fermilab ILC Goals Fermilab’s role in the GDE & the ILC machine Design Main Linac design Accelerator physics Main Linac components (Cryomodule, RF components) SCRF Cavity & Cryomodule R&D Cavity R&D

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ILC Accelerator R&D at Fermilab

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  1. Robert Kephart ILC Program Director ILC Accelerator R&D at Fermilab

  2. Outline • Fermilab ILC Goals • Fermilab’s role in the GDE & the ILC machine Design • Main Linac design • Accelerator physics • Main Linac components (Cryomodule, RF components) • SCRF Cavity & Cryomodule R&D • Cavity R&D • 3.9 GHz and 1.3 GHz Collaboration with DESY • ILC Cryomodule Design • RF activities ( Modulators, Klystrons, LLRF & Controls) • SCRF infrastructure • FNAL/ANL joint facility for cavity BCP and EP • Cryomodule assembly Facility • ILC test facilities (ILCTA) • ILC Civil and Site Development • Industrialization • Funding • Conclusion HEPAP Advanced Accelerator R&D meeting

  3. Goals of Fermilab’s ILC R&D • The overarching goal of Fermilab’s ILC R&D program is to establish credentials in machine design and SCRF technology such that FNAL is the preferred international site to host the ILC. As part of the Global Design Effort (GDE) our goal is to help design the machine, estimate the cost, and gain international support. • Fermilab ILC R&D activities: • ILC Machine Design • Development of SCRF technology & infrastructure • Conventional Facility & Site Studies for a US ILC site • Industrialization & Cost Reduction • ILC Physics, Detector Design, and Detector R&D HEPAP Advanced Accelerator R&D meeting

  4. Fermilab’s Role in the GDE • GDE goal = complete the Reference Design Report (RDR) and a cost estimate by the end 2006  established RDR organization • Design & Cost Board (coordinates machine design) • Responsible for producing the RDR and the cost estimate • 9 members ( 3/region) + Chairman • P Garbincius ( FNAL) = chair, R. Kephart (FNAL) member • Change Control Board (ILC baseline configuration control) • 9 member board (3/region), N Toge = Chairman • S. Mishra (FNAL) is one of 3 U.S. Members • ILC Machine “Area” Leaders (typically 3 Ldrs 1/region) • Civil and Site: Vic Kuchler (FNAL) = Americas Ldr • Main Linac Design: N. Solyak (FNAL) = 1 of 2 Americas Ldrs • Cryomodule: H. Carter (FNAL) = Americas Ldr • Cryogenics system: T. Peterson (FNAL) = Americas Ldr • Magnet systems: J. Tompkins (FNAL) = Americas Ldr • Communications: E. Clements (FNAL) = Americas Ldr • FNAL is playing a major role in the GDE & ILC machine design HEPAP Advanced Accelerator R&D meeting

  5. ILC Machine Design • Fermilab has focused its R&D efforts on the ILC Main Linacs. • Main Linac activities: • Accelerator physics design • Demonstrate feasibility of all Main Linac technical components • Engineering design of ML technical systems • Estimates of the ML cost & methods for cost reduction • U.S. Industrialization of high volume ML components • Other R&D ( smaller efforts) • Design studies of the ILC Damping Rings • Working on the Machine-Detector Interface • Physics studies & Detector R&D • Civil and Site Development activities: • Civil engineering of machine enclosures • With the GDE, develop a matrix for comparing possible ILC sites • Study U.S. sites on or near the Fermilab site HEPAP Advanced Accelerator R&D meeting

  6. Main Linac Design • Accelerator physics: • Main Linac optics studies • End-to-end simulation of the machine • Study emittance preservation and vibration issues • RF timing and control issues • Engineering Design of Main Linac components • Fermilab has been asked to supply lots of engineering in FY06 in support of the Main Linac design for the RDR • Cryomodule Development (incl. high gradient cavities!) • Cryogenic & RF system Design • LLRF & control systems design • Design of linac auxilary systems • Cooling water, cable trays, safety interlocks, etc. HEPAP Advanced Accelerator R&D meeting

  7. SCRF Cavity R&D • Our goal is to rapidly advance the intellectual understanding of SCRF surface physics and establish process controls to reliably achieve high gradient ( 35 MV/M) SCRF cavity operation • Approach: Establish a “tight loop” processing and test infrastructure in the U.S. • Tight loop elements: • Cavity fabrication improvements ( e.g. single crystal) • BCP & Electro-polish facilities • High purity water and High pressure rinse • Vertical test facilities • SCRF experts & materials program to interpret results • SCRF materials program =FNAL,UW,NW,Cornell,TJNL,MSU, etc HEPAP Advanced Accelerator R&D meeting

  8. ILC 1.3 GHz Cavities @ FNAL • Industrial fabrication of cavities, some in U.S. Industry • Two Single/large Crystal cavities under development with TJNL • BCP and vertical testing at Cornell (25 MV/m) • EP and vertical testing at TJNL. ( 35 MV/m) • Joint BCP/EP facility being developed ANL (2007) • High Power Horizontal test facilities @ FNAL (2006) • Vertical test facility @ FNAL (2007) • More later on these facilities Bead pull RF Testing @ FNAL 4 cavities received from ACCEL 4 cavities on order at AES 2 cavities on order at TJNL 4 cavities expected from KEK HEPAP Advanced Accelerator R&D meeting

  9. DESY Collaboration • Fermilab and DESY have collaborated on advanced accelerator R&D for many years • As members of the TESLA collaboration: • FNAL & DESY collaborated to build both TTF & the Fermilab NICADD Photo-Injector Lab (FNPL) at A0 • Currently FNAL is building a 3.9 GHz 3rd Harmonic module for the TTF @ DESY (doubles light output of the VUV-FEL) • Status of the 3.9 GHz effort • 3.9 GHz cryomodule design is complete • Uses four 9 cell 3.9 GHz cavities ( 2 of 6 total are now welded) • BCP processing at joint ANL/FNAL facility in FY06 • Vertical test @ A0, Horizontal test in ILCTA_MDB • Serving as a pilot program for much of our ILC SCRF infrastructure (processing, vertical and horizontal test, cryomodule assembly, etc.) • Expect to deliver the 3.9 GHz module to DESY in early 2007 HEPAP Advanced Accelerator R&D meeting

  10. DESY Collaboration 3.9 GHz 9 cell 3.9 GHz cavity HEPAP Advanced Accelerator R&D meeting

  11. DESY Collaboration • DESY will supply Fermilab with all the parts for one 1.3 GHz (type 3) TESLA cryomodule • DESY will send us 8 TESLA 9 cell cavities • Vertically tested, dressed, & horizontally tested @DESY • Goal is to qualify them to 28 MV/M • DESY will also supply cold mass parts • Expect all parts at FNAL early in FY07 • Will be the 1st ILC type cryomodule built in the U.S. • Plan to assemble it by summer of 2007 • Then… test it at Fermilab later that year • Our ability to test it will depend on whether we receive sufficient funds in FY06 to finish the cryogenics for our cryomodule test facility (ILCTA_NM) HEPAP Advanced Accelerator R&D meeting

  12. ILC Cryomodule • ILC Cryomodule Design • Collaborative effort on the next generation ILC cryomodule • 1st ILC Cryomodule (2006-07) • Assemble a TESLA TTF type III cryomodule from the “kit” of part provided by DESY, cavities fully tested. • 2nd Cryomodule (2007-08) • Also TTF type III cryomodule • Uses cavities that are processed and tested in the US • Cavities: Accel(4), AES(4), TJNL(2), KEK(4) • Cryostat and cold mass from Zannon in Europe • BCP processing at JLAB & Cornell • Electropolish at JLAB and perhaps ANL/FNAL joint facility • Vertical test (bare) at Cornell & JLAB • Horizontal test (high power) at FNAL ILCTA_MDB HEPAP Advanced Accelerator R&D meeting

  13. ILC Cryomodule • 3rd-4th Cryomodules (2008-09) • 1st type IV cryomodules built anywhere • Begin industrial production of components • Assembly and test at Fermilab • 5th-6th Cryomodules (2010) • Transfer knowledge gained to Industry for ILC cryomodule mass production • 2006-2010: Develop, build & test basic building blocks of the Main Linac • Cryomodules (including cavities, couplers, instrumentation, etc) • RF systems ( modulators, klystrons, LLRF) • Cryogenic system design • Evaluate main linac cost and reliability issues HEPAP Advanced Accelerator R&D meeting

  14. Cryomodule DESY TTF ILC cryomodule • ILC cryomodules are complex objects • TTF cryomodules (type III) need to evolve for ILC • FNAL is collaborating with DESY, INFN, KEK, CERN, JLAB, SLAC, etc. on the design of the next generation ILC cryomodule (Type IV) HEPAP Advanced Accelerator R&D meeting

  15. Main Coupler & Tuner R&D TESLA Blade-Tuner TESLA Main Coupler 1.3 GHz, pulsed operation Two windows, adjustable 2K (4K) heat load 0.06 (0.5) W Main Couplers and tuners are complex FNAL plans R&D aimed at cost reduction Fermilab is also working on controlling Lorentz detuning via Piezoelectric tuners in a feed-forward system Fermilab plans to build a facility to test couplers HEPAP Advanced Accelerator R&D meeting

  16. ILC RF Systems R&D • Modulator R&D • 10 Modulators built based on Fermilab design • 3 by FNAL and 7 by industry • In operation ~10 yrs @ DESY and FNPL • 2 new Modulators will be finished in FY06 • 1 = PD, other = ILC, collaborating with SLAC • Klystrons • Plan to order new 10 MW klystron • Shared effort with PD, long-pulse operation planned for PD may benefit ILC • Horizontal mount = XFEL spec • Design improvements are needed to reach reliable long-term operation at 10 MW peak / 150 kW average power. • Also need to develop U.S. vendors • LLRF R&D in collab with Penn, DESY, INFN, etc. FNPL Modulator 10 MW Thales Klystron HEPAP Advanced Accelerator R&D meeting

  17. ILC RF Systems R&D • Overall objective is to assemble one, then two ILC RF units in New Muon building ( ILCTA_NM) 1st by about 2009, 2nd a year or so later • Two x 3 Cryomodules • Two Modulators • Two 10 MW Klystrons • Waveguide and RF distribution components • LLRF & controls • Move FNPL photo injector to provide electron beams • Other RF tasks • 3.9 GHz RF power and LLRF for tests • Small RF systems for Vertical & Horizontal test facilities • Industrialization of RF components (more in a minute) HEPAP Advanced Accelerator R&D meeting

  18. SCRF infrastructure • Following the technology choice in Aug 04 FNAL launched a major program to develop the extensive SCRF infrastructure required for ILC • ILC/GDE specific R&D tasks described in an MOU • FNAL is also spending “lab” operating funds on this • The required infrastructure is complex • It takes time to develop • It takes time to train personnel to achieve cavities with high operating gradients • It is expensive! DESY spent >140 M euro M&S on TTF and the associated infrastructure • Costs are “front loaded” but our funding is not • Our ability to make progress is funding limited HEPAP Advanced Accelerator R&D meeting

  19. SCRF Infrastructure • High gradient cavities require extensive infrastructure • Bare cavities • Fabrication facilities ( e.g. Electron beam welders) • Buffered Chemical Polish facilities (BCP) • Electro-polish facilities (EP) • Ultra clean H20 & High Pressure Rinse systems • Vertical Test facilities ( Cryogenics + low power RF) • Cavity Dressing Facilities ( cryostat, tuner, coupler) • Class 100 clean room • Horizontal cavity & Coupler test facility ( RF pulsed power) • String Assembly Facilities • Large class 100 clean rooms, Large fixtures • Class 10 enclosures for cavity inner connects • Cryo-module test facilities • Cryogenics, pulsed RF power, LLRF, controls, shielding, etc. • Beam tests  electron source (e.g. FNPL Photo-injector) • FNAL and U.S. collaborators are building this  $$$$$ HEPAP Advanced Accelerator R&D meeting

  20. Examples: SCRF infrastructure Horizontal Test of Dressed Cavity @ DESY TJNL e-beam welding Chemistry Cryomodule Test at DESY TTF TJNL Electro polish HEPAP Advanced Accelerator R&D meeting

  21. Examples: Cryomodule Assembly Assembly of a cavity string in a Class 100 clean room at DESY The inter-cavity connection is done in class 10 cleanroom Cryomodule Assemby at DESY Lots of new specialized SCRF infrastructure needed for ILC! HEPAP Advanced Accelerator R&D meeting

  22. Building U.S. SCRF infrastructure • Existing U.S. facilities at Cornell, TJNL, and ANL are being upgraded to process the 1.3 GHz ILC cavities but not sufficient • A new FNAL/ANL BCP facility built at ANL (operational ~March) • An Electro-polishing facility is being designed by the ILC Collaboration • A prototype will be built at ANL/Fermilab Cavity Processing Facility at ANL. HEPAP Advanced Accelerator R&D meeting

  23. FNAL SCRF Infrastructure • A Cryomodule Assembly Facility (CAF) is being built in (MP9) • Vertically tested cavities will be dressed (He vessel, coupler, etc) in smaller clean rooms prior to horizontal test • Horizontally tested cavities assembled into a string in large clean room before final Cryo-module assembly takes place CAF-MP9 Class 10 and 100 clean rooms ordered, operational by Summer 06 Parts for new Cryomodule Assembly fixture in IB4 Plan = expand CAF into Industrial Center Bldg after LHC quads HEPAP Advanced Accelerator R&D meeting

  24. ILC Test Areas (ILCTA) • SCRF test facilities are needed to carryout the ILC program • Vertical Test (bare cavities) IB1 • IB1 has 60 W @ 1.8 K now • Horizontal Test (dressed cavities) • IB1 & Meson Bldg (PD) • Meson will have 60 W @ 1.8 K soon • Cryomodule test facility • Cleaning out New Muon Lab • Remove CCM install cryogenics • Photo injector moves  e beam • Power 1st cryomodule in 2007 • RF Power & Cryogenics  These are Big expensive facilities ! Industrial Building 1 New Muon Lab HEPAP Advanced Accelerator R&D meeting

  25. Civil and Site Development "The U.S. Department of Energy has expressed its interest in the possibility of hosting a linear collider, at Fermilab, subject to the machine being affordable and scientifically validated by physics discoveries at the LHC.“ • Our goal is to determine the best possible host site for a prospective ILC bid in northern Illinois • With the GDE we are developing the ILC Civil Design • Tunnel Design ( e.g. 1 vs 2 tunnels; laser-straight vs curved • Geological and environmental studies HEPAP Advanced Accelerator R&D meeting

  26. Industrialization • The principle goal of ILC industrialization is to establish in US industry the capability and infrastructure to mass produce the components to build the ILC • Another important goal is cost reduction • Cryomodules (2000 required for 500 GeV of linac) • SCRF Cavities: (16,000) • Reliably achieve > 35 MV/m and Q ~1x1010 • RF couplers and Cavity Tuners (16,000 each) • RF Components • ~ 600 klystrons ( 1.3 GHz, 10 MW, 1.5 ms, 5 Hz) • ~ 600 modulators • Waveguide, circulators, host of other RF and vacuum components… HEPAP Advanced Accelerator R&D meeting

  27. Industrialization • Large Cryogenic systems (~ 40 KW at 1.8 K) • Detectors, instrumentation, etc… • Civil construction • A huge job ( currently estimated @ 40% of the ILC cost) • In FY06 the GDE plans Industrial cost estimates • Limited in scope ( available funding is small) • US industrialization for ILC is just beginning • FNAL hosted an Industrial Forum in 2005 • Need more industrial involvement in cost estimates • Need industrial studies aimed at cost reduction • Our ability to engage U.S. industry is limited by the available funding • Hope is that FY07 funding will allow a sensible start HEPAP Advanced Accelerator R&D meeting

  28. LINEAR COLLIDER FORUM OF AMERICA • Provides LCFOA members with current information on the ILC program through newsletters, bulletins and meetings in Washington, DC and national laboratories, • Serves as an advocate for early and meaningful U.S. industry participation in the ILC program, • Facilitates two-way technology transfer between the ILC program and U.S. industry, • Conducts and/or contributes to industrialization studies to reduce component manufacturing costs and schedules, and evaluate innovative construction practices, and • Supports the siting of the ILC in the United States HEPAP Advanced Accelerator R&D meeting

  29. Systems Tests • It is Fermilab’s opinion that a significant systems test will be required in advance of ILC construction to verify: • Technical performance of critical/cost driving components • Systems integration • Vendor performance • Reliability of cost estimate • Should include 1-2% of final cryomodule count, produced by vendors in a pre-production run • Could include a demonstration damping ring • Expect to propose to host at Fermilab with potential for utilization of Tevatron as DR. • Believe the correct approach is to develop requirements first, then evaluate existing or newly constructed facilities. • Would like to engage the GDE on development of these requirements. HEPAP Advanced Accelerator R&D meeting

  30. A Path to Industrialization ILC Engineering Test Facility HEPAP Advanced Accelerator R&D meeting

  31. Proton Driver • The Proton Driver is a high intensity 8 GeV scrf H- linac, which when coupled with Main Injector and target improvements will allow delivery of >2 MW onto a neutrino target, at any energy between 30-120 GeV. • We are integrating our Proton Driver and ILC efforts. • The Proton Driver goal is to develop the critical technologies that, when married to ILC technologies, could enable the construction of a high intensity neutrino source if the ILC is delayed. • Based on assumption that there will be significant preproduction development and testing associated with ILC. HEPAP Advanced Accelerator R&D meeting

  32. Proton Driver • Critical technologies under development: • Low b acceleration • RF sources and distribution • H- transport • MI upgrades • Targetry • Work carried out in collaboration with ANL, BNL, LBNL, MSU, (SLAC and JLab) • Will adapt the 1-8 GeV linac design to ILC design • But could share development costs of rf sources • Ferrite based phase-amplitude controllers are the critical technology element. • Potential application to ILC • Civil design will be kept in concert with ILC design and needs of a possible ILC test accelerator. HEPAP Advanced Accelerator R&D meeting

  33. PD RF Distribution System • 36 cavities/klystron • “E-H tuner” is the key HEPAP Advanced Accelerator R&D meeting

  34. ELECTRONICALLY ADJUSTABLEE-H TUNER (1300 MHz Waveguide) FERRITE LOADED SHORTED STUBS CHANGE ELECTRICAL LENGTH DEPENDING ON DC MAGNETIC BIAS. TWO COILS PROVIDE INDEPENDENT PHASE AND AMPLITUDE CONTROL OF CAVITIES HEPAP Advanced Accelerator R&D meeting

  35. HEPAP Advanced Accelerator R&D meeting

  36. Front End Test Single Klystron Feeds SCRF Linac to E > 100 MeV SCRF Spoke Resonator Cryomodules Charging Supply MEBT RFQ Modulator Capacitor / Switch / Bouncer Ferrite Tuners RF Distribution Waveguide 115kV Pulse Transformer 325 MHz Klystron – Toshiba E3740A (JPARC) • First test of: • Spoke resonator cavities with beam • RF distribution system • Under construction at Meson Lab HEPAP Advanced Accelerator R&D meeting

  37. Proton Driver Synergies “ILC” LINAC • RIA • Beam test of spoke resonators • J-PARC • Front end/325 MHz kystron • ILC • Ferrite phase shifters • RF sources • Industrialization and systems test? (TBD) HEPAP Advanced Accelerator R&D meeting

  38. ILC and SCRF Resources Numbers are direct  no overhead • FY06: FNAL program was scaled back to fit budget. • SWF funds have been identified • Still missing ~ $ 2.7 M M&S for SCRF infrastructure (DOE supplemental) • FY07-08 represent Fermilab desires • Bid-to-host funds mostly go to outside A&E firms HEPAP Advanced Accelerator R&D meeting

  39. Conclusions • Fermilab has a large and growing ILC R&D effort • Our prime objective is to achieve technical excellence in the Main Linac systems and to position ourselves to be a strong candidate to host the ILC • We work closely with international partners in the GDE on the machine design • Main Linac ( accelerator physics, simulation ) • Civil & Site studies • Accelerator systems( cryogenics, RF, controls, etc) • Small efforts on electron source, damping rings • We are building an extensive SCRF infrastructure and developing expertise in support of these goals • High gradient cavities (design, fabrication, BCP, EP ) • Cryomodule Design & Assemby ( CAF) • Cavity test facilities ( horizontal and vertical) • Cryomodule Test facilities ( ILCTA including beam tests ) • R&D program on Proton Driver is being aligned/integrated • Our progress is limited by the available funding HEPAP Advanced Accelerator R&D meeting

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