f Project X SRF OverviewGoalselliptical cavities Bob Kephart
f Project X SRF Overview/Goals/elliptical cavities Bob Kephart Fermilab Project X Workshop Nov 21 -22, 2008
f Project X § Fermilab envisions a 2. 1 MW (upgradeable) proton source for long baseline neutrino physics based on an 8 Ge. V SRF h- linac injecting into the recycler and then the Main Injector (60 -120 Ge. V) § R&D endorsed by HEPAP P 5 § R&D to develop the front end of the linac is in progress via the HINS program at Fermilab Ø 325 MHz front end based on SRF “spoke resonators” § Design is synergistic with ILC Ø 7/8 of linac uses beta= 1 ILC-like cryomodules Ø R&D plan relies heavily on ILC and SRF R&D program, infrastructure and industrialization efforts § Goal: Px construction approval (CD 3 ) ~ 2013 -14 11/21/08 Project X Collaboration meeting – Bob Kephart 2
f High Intensity Proton Accelerator – Project X high duty factor, high availability, good beam structure >2 MW (60 -120 Ge. V) for neutrinos >200 k. W (8 Ge. V) for kaons, muons, … Nu. MI (NOv. A Souda ) n, Min n 8 Ge. V ILC-like Linac L E S DU N D Recycler , Lead Main Injector: Project X = new 8 Ge. V ILC-like Linac + Recycler upgrades + Main Injector upgrades National Project with International Collaboration 11/21/08 Project X Collaboration meeting – Bob Kephart 3
f Project X Front End Linac 1000 k. W 8 Ge. V Linac 28 Klystrons (2 types) 461 SC Cavities 58 Cryomodules 325 MHz 0 -10 Me. V 2. 5 MW JPARC Modulator Klystron Multi-Cavity Fanout Phase and Amplitude Control 325 MHz 10 -120 Me. V 1 Klystron (JPARC 2. 5 MW) H RFQ RT SSR 1 SSR 2 9 or 11 Cavites / Cryomodule 51 Single Spoke Resonators 5 Cryomodules Modulator 0. 12 -0. 42 Ge. V 3 Klystrons (JPARC 2. 5 MW) 42 Triple Spoke Resonators 7 Cryomodules Modulator 1 Klystron (JPARC 2. 5 MW) 16 RT Cavities TSR TSR Modulator TSR TSR 6 Cavites-6 quads / Cryomodule 1300 MHz 0. 42 -1. 3 Ge. V 4 Klystrons (ILC 10 MW MBK) 64 Squeezed Cavities ( b=0. 81) 8 Cryomodules 1300 MHz LINAC Modulator =0. 8 =0. 8 Modulator Modulator 1. 3 -8. 0 Ge. V 19 Klystrons (ILC 10 MW MBK) 304 ILC-identical Cavities 38 ILC-like Cryomodules ILC ILC ILC Modulator Modulator Modulator Modulator ILC 11/21/08 ILC ILC ILC ILC Project X Collaboration meeting – Bob Kephart ILC ILC ILC 4 ILC
f Project X Specifications (ICD ver 0. 4) 11/21/08 Project X Collaboration meeting – Bob Kephart 5
f Ongoing Project X R&D § Most of linac is ILC-like technology based Ø 1. 3 GHz, pulsed at 5 Hz, 20 MA x 1. 25 msec (1 x 10 14) § § 325 MHz RFQ to 2. 5 Me. V 325 MHz RT accel structures to 10 Me. V 325 MHz SC spoke resonators to 0. 4 Ge. V SC solenoid focusing 2. 5 -120 Me. V § ILC squeezed structures to 1. 3 Ge. V § Standard beta=1 structures to 8 Ge. V § SC quad focusing magnets. 12 to 8 Ge. V Ø Standard ILC focusing lattice in final 4 RF units HINS ILC/SRF § Plus… Separate Project X R&D funds 11/21/08 Project X Collaboration meeting – Bob Kephart 6
f This Talk § The goal of this talk is to lay out the numbers of required SRF components and launch discussion of how we might complete the remaining R&D tasks and build these components as a collaboration § I will make specific assumptions and suggestions § All such assumptions and suggestions are preliminary and open for discussion at this meeting § WG goal: creation of a strawman “construction” model for the SRF components of Project X § Use this construction model and the list of important R&D topics to plan the R&D program 11/21/08 Project X Collaboration meeting – Bob Kephart 7
f Goals § Goal 1: Develop the needed SRF expertise such that the collaboration is ready to build Project X § Goal 2: Learn how to work effectively as a collaboration during the R&D phase so that construction phase works well. § Goal 3: Establish collaborative arrangements for the R&D and construction that benefit the partners § Goal 4: Design, build, and test prototype Px SRF equipment to reduce technical and cost uncertainty § Goal 5: Develop the required SRF infrastructure so that SRF component fabrication can begin about 1 yr after Px CD 3 approval (~2014) 11/21/08 Project X Collaboration meeting – Bob Kephart 8
f Assumptions about the way we will work § Project X will be sited at Fermilab and largely funded via U. S. HEP funds managed by Fermilab § Contributions from international partners (if any) will take the form in-kind contributions of equipment or personnel § Fermilab will have overall Project Management and System Integration responsibility for the project § Management responsibility for subsystems, R&D objectives, and design/production of accelerator components will be shared with U. S. and international partners. In some cases partners may play the leading role. 11/21/08 Project X Collaboration meeting – Bob Kephart 9
f Project X SRF components (ICD V 1. 0) § 2 SSR 1 Cryomodules (10 -30 Me. V) Ø Nine =0. 22 single spoke resonators/CM Ø Nine SC solenoids/CM provide focusing § 3 SSR 2 Cryomodules (30 -120 Me. V) Ø eleven =0. 4 single spoke resonators/CM Ø Six SC solenoids/CM provide focusing § 7 TSR Cryomodules (120 -420 Me. V) Ø six =0. 6 triple spoke resonators/CM Ø Six SC quad magnets/CM for focusing + corrector magnets § 8 S-ILC elliptical cavity Cryomodules (420 -1200 Me. V) Ø eight =0. 81 squeezed elliptical cavities/CM Ø 1 SC quad/corrector package magnet/CM § 38 ILC-like elliptical cavity Cryomodules (1. 2 -8 Ge. V) Ø eight =1 elliptical cavities/CM Ø 1 SC quad/corrector package/CM 11/21/08 Project X Collaboration meeting – Bob Kephart 10
f Some totals § 58 Cryomodules of at least 5 types § 461 SRF Cavities Ø Ø Ø 18 33 42 64 304 =0. 22 single spoke resonators (SSR 1) =0. 40 single spoke resonators (SSR 2) =0. 6 triple spoke resonators (TSR) =0. 81 Squeezed elliptical cavities =1 elliptical cavities § >123 Magnets (in CM’s) Ø > 36 SC solenoids Ø > 44 quad/corrector packages § Also need SRF fabrication and test infrastructure sized to build all of this in ~3 years (actual time is likely to be 4 yrs or more) starting in ~ 2014 11/21/08 Project X Collaboration meeting – Bob Kephart 11
f EP Infrastructure for Elliptical cavities § Assume the Project X cryomodule is a variant of the XFEL type III+ cryomodule ( Type 4 with Px mods) § Assume an average operating gradient of 26 MV/M § Px needs about 368 “qualified” elliptical cavities § Assume yields at 25 MV/M are about ~90% we must fabricate, process, and test ~ 400 nine cell elliptical cavities § Assume all cavities are fabricated in U. S. Industry or contributed as “in-kind” ( e. g. India ) § Assume bulk EP in industry § Assume 2 process and VTS test cycles per cavity at lab’s 800 process and test cycles will be required in ~3 yrs or 226 P&T cycles per year § Assume P&T shared equally, JLAB and ANL/FNAL 11/21/08 Project X Collaboration meeting – Bob Kephart 12
f Infrastructure for Elliptical cavities § Existing EP and HPR infrastructure at JLAB and under construction at ANL/FNAL can handle about 1/3 of this throughput (~ 80 P&T cycles/yr) § Industry will have to be qualified to do bulk EP (ACCEL/Henkel is doing this for XFEL. ABLE, AES, Niowave are interested in U. S. ) § Seems unlikely that final EP/HPR/clean room work can move to Industry § Upgrades will be needed to lab EP processing facilities prior to the start of Project X construction 11/21/08 Project X Collaboration meeting – Bob Kephart 13
f Infrastructure for Elliptical cavities § Need at least 226 Vertical Tests per year Ø Cavities are often tested more than once to diagnose problems or after HPR to correct field emission § Upgrades are currently in progress for FNAL VTS that will increase test cycles to ~240/yr Ø But about half of these will be needed for spoke resonator tests (VTS-2/3 cryostats will be sized for spokes) Ø Upgraded FNAL VTS can handle about ½ the planned bare cavity testing of elliptical cavities for Project X § Will JLAB vertical dewars be available and can they handle the other ½ of the load > 113 tests/yr ? Ø Are Upgrades needed? 12 Ge. V Project Conflicts ? § What processing and test might be done in India ? § New EP or new VTS infrastructure can take 1 -2 yrs to construct and commission 11/21/08 Project X Collaboration meeting – Bob Kephart 14
f Infrastructure for Elliptical cavities § Elliptical cavities must be “dressed” with Helium vessels, couplers, tuners and HTS tested prior to integration into cryomodules. § Required throughput: 360 cavities in 36 months 10 per month average (+ any rework) § Currently we envision two =1 elliptical cavity dressing lines, one at TJNAF and one at FNAL Ø but =0. 81 cavities might be dressed in India § Assume all HTS testing is done at FNAL 11/21/08 Project X Collaboration meeting – Bob Kephart 15
f Infrastructure for Elliptical cavities § HTS tests fully dressed cavities with pulsed RF and exercises coupler and tuner § An existing facility (HTS 1) accepts a single cavity and is in operation in MDB at Fermilab § Plans exist to add a second cryostat that will handle two cavities at a time (HTS 2) at MDB § HTS 1+HTS 2 may be sufficient for Px Ø But cryo load may be an issue with HINS front end tests Ø Need to decide if all cavities receive HTS test 11/21/08 Project X Collaboration meeting – Bob Kephart 16
f Infrastructure for Elliptical cavities § Px Cryomodule assembly: Ø Will need to produce and test 45 ILC-like Cryomodules in 36 months average 1. 25 CM per month. Ø Existing Fermilab CAF infrastructure in MP 9 & ICB should be able to handle this throughput with minor upgrades § Cryomodule test: Ø Facility at NML will be able to test two CM with beam Ø Will need a dedicated CM test stand (s) capable of testing 1. 25 CM/month Ø Assume it will be similar to CM test stand for XFEL and located at Fermilab (to avoid transport after assembly) Ø Will need cryo and RF infrastructure Ø Need to identify the location for this facility and develop a design 11/21/08 Project X Collaboration meeting – Bob Kephart 17
f Infrastructure Spoke Resonators § Need 93 resonators of 3 types in 3 yrs fabricate, process, and test 31 per year § Assume all Resonators are fabricated by Industry Ø Candidates: AES, Niowave/Roark, Zanon, ACCEL, PAVACTRIUMF, Indian Labs - Indian Industry § Assume spoke resonator processing at ? Ø BCP or EP? Assume BCP Where? ANL now, JLAB? , elsewhere? § Assume testing of bare spoke resonators in IB 1 Ø ~113 tests/yr available… should be adequate § Assume dressed spoke resonators test in MDB in a HINS HTS test facility § Assume Spoke Resonator Cryomodule assembly Ø MP 9 saturated by elliptical CM’s? Where ? ? ? § Test facility for spoke resonator Cryomodules ? 11/21/08 Project X Collaboration meeting – Bob Kephart 18
f RF components § 5 klystrons 325 MHz@ 2. 5 MW § 5 modulators, 140 KV, 1. 5 MS pulse length § RF distribution system, phase shifters, circulators, etc § § § 23 klystrons 1. 3 GHz@10 MW 23 modulators , 140 KV, 1. 5 MS pulse length RF distribution system, circulators, etc RF couplers Test stands LLRF control system § Working assumption is that SLAC is a major player § How do SLAC and FNAL share the tasks ? § What R&D is needed ? We need a plan ! 11/21/08 Project X Collaboration meeting – Bob Kephart 19
f Charge 11/21/08 Project X Collaboration meeting – Bob Kephart 20
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