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Status and Plans for SRF FacilityStatus and Plans for SRF Facility

Sergei Nagaitsev

May 18, 2007

S. Nagaitsev 2

f Setting the ScaleSetting the Scale

For ILC: produce 4 to 6 cryomodules in the next 4 years ~ 50 cavities used; additional needed for development and testing

International (ILC/GDE) coordination: S0 ‘tight loop’ task force:

• Process and re-process the inside surface of a limited number of cavities, repeatedly, testing each time… (~100 procedures/year for several years)

• Answers due 08, 09 guidance for a final gradient recommendation

S1 ‘cryomodule’ task force :• 31.5 MV/m OPERATING cryomodule

S2 ‘string test’ task force :• Put it all together• Run ILC-like beam• Various critical tasks

S. Nagaitsev 3

f SCRF Cavity Gradient RDSCRF Cavity Gradient RD

“S0 / S1” GDE charge: Provide the information needed

to make a gradient decision for TDR. Challenge: Cavity surface processing

variability (yield) Secondary: the rest of the fabrication effort

• From the mine to the cryomodule (‘production-like RD’)

Focused charge, well defined deliverable, broad base, expensive task with excellent cost / benefit

US labs are heavily involved but expertise is scattered; Fermilab is playing a “catch-up” game.

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f String test (S2)String test (S2)

Charge: Recommend a string test strategy;

Expensive Referendum on the SRF readiness for the ILC Many duplication / competition /

standardization issues between DESY, KEK, FNAL

Cross threaded with mass-production issues, ‘regional interest’ and lab ambitions

R or D? What is the balance?

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f

Surface Processing

Cavity Fabrication

Vertical Testing

He Vessel, couplers,

tuner

HPR or reprocess

Horizontal Testing

Cold String Assembly

Pass!

Pass!

Fail!

Fail!

Cavity/CM process and TestingCavity/CM process and Testing

Plan… Develop in labs then transfer technology to industry

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f SCRF InfrastructureSCRF Infrastructure

This process requires extensive infrastructure Bare cavities

Fabrication facilities (Electron beam welder, QC, etc) Surface treatment 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 10/100 clean room Horizontal Test System (cryogenics and pulsed RF power)

String Assembly Facilities Large class 10/100 clean rooms, Large fixtures

Cryo-module test facilities Cryogenics, pulsed RF power, LLRF, controls, shielding, etc. Beam tests electron source (RF unit test facility at NML)

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f Materials & SRF R&D infrastructureMaterials & SRF R&D infrastructure

Quality assurance: Characterization of Nb sheet from vendors Surface properties: oxide layer, inclusions, and scratches (eddy

scanner) Measure material composition (RRR, chemical composition, etc) Measure Nb mechanical properties ( ie crystal structure)

Surface processing studies Electropolish and BCP process studies (single cell programs) Surface contamination studies

Infrastructure: (ANL, TJNL, FNAL, Cornell, MSU, etc…) Labs for handling HF and processing and test of single cells Materials equipment ( RRR measurement, INSTRON, EM microscope,

SIMS.

Weld studies ( e.g. crystal structure, contamination, TIG welding) ILC is helping to upgrade existing national capabilities but much of

this is funded by other sources

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fCavity Fabrication

By Industry

Cavity Dressing &Horizontal Testing

@ Fermilab

SurfaceProcessing @ Cornell

SurfaceProcessing

@ Jlab

SurfaceProcessing @ ANL/FNAL

Vertical Testing @ Cornell

Vertical Testing @ Jlab

Vertical Testing @ FNAL

Exists

Developing

U.S. Cavity Processing & TestU.S. Cavity Processing & Test

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f FNAL/ANL collaboration Goal: A new joint surface processing facility Clean rooms, BCP, and state of the art EP New Chemistry and Clean rooms operational

New Clean Rooms Controls and HF scrubber

Surface Processing @ ANLSurface Processing @ ANL

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f

•World knowledge to design new EP system

•Design Review 2/12/07, Under construction

•Plan: Commission late FY07

•Capacity ~ 45 EP cycles per year

•Plan for new HPR system by late 07

New Electropolish facility @ANL New Electropolish facility @ANL

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f Fermilab SCRF MAPFermilab SCRF MAP

New Muon Lab:RF unit test facility

MDB:CCII HTSHINS

IB1: VTS

WH

CAF:MP9ICB

IARC

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f A new Vertical Test Stand is under Construction at

Fermilab (IB1) Existing 1.8 K Cryogenic plant 125 W at 2 K (250 W intermittent test) RF system based on TJNL VTS RF/DAQ system Current test Stand will be capable of testing ~50 Cavities/yr Commissioning started (cryo), reached 2K, next step: single cavity test Evolutionary upgrades: Thermometry for 9-cells, 2 cavities at a time, 2

top plates, Cryo upgrades: increased pumping capability & purifiers, up to two additional VTS cryostats

Ultimate capacity ~ 264 cavity tests/yr

VTS Cryostat:IB1 New RF &

Control Room

Movable shielding for up to 3 pits

Vertical Test@FNALVertical Test@FNAL

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f HTS @ MDB HTS @ MDB

Cryostat complete: ~DESY design but 2 Doors improve access

Extensive MDB cryo modifications ~100W@1.8 K 300 KW klystron & modulator is in place and tested Cooled down w/o cavity, 1st cavity test in May

1.3 GHz Cavity in

HTS Cryostat

HTS CryostatInstalled at MDB

DESY C22 VTS @ 17 MV/M

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f MDB InfrastructureMDB Infrastructure

RF Power for HTS

Cryogenics transfer lines in MDB

Large Vacuum Pump for 2K

RF Power for HTS

Capture Cavity-II

S. Nagaitsev 15

f CAF: MP9CAF: MP9

Infrastructure: String Assembly Fixtures Clean Vacuum & Leak Check Ultra Pure Gas and Water Ultrasonic Cleaner Cold Mass Assembly Fixture

String Assembly Fixture

1st Cavity being prepared for HTS

MP9 Clean Roomand tooling built in FY06

UltrasonicCleaner

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f CAF: ICB Final AssemblyCAF: ICB Final Assembly

Industrial Center Building (ICB) 18,000 ft2

Alignment, Instrumentation, coupler installation, etc Large Vacuum Vessel Assembly Fixture

CAF Goal: Produce R&D quantity Cryomodules (~1/month) Goal: Use infrastructure for tech transfer to industry Will Assemble 1st cryomodule (DESY kit) early fall 07 Also 3.9 GHz!

Cryomodule has1200 parts !

Parts for copy of DESY Assembly fixtureICB cleaned!

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f ILCTA_NML@FNALILCTA_NML@FNAL

NML Building

CCM removal: Sep 06

NML: Apr 071st of 2 refrigerators each 60 W@1.8K

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f Two CMs with beamTwo CMs with beam

The existing building is perfect for testing two cryomodules with ILC-like beam. The building can be extended to fit 3 cryomodules.

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f ILC RF unit with BeamILC RF unit with Beam

Construct a new building ~50m away from NML Connect by ILC-like tunnel (2nd RF unit) Upgrade RF system to 10 MW klystron Add larger 300W @ 1.8 K refrigerator New Bldg houses diagnostics, dump, refrigerator

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f SummarySummary

Cavities & Cryomodules are cost drivers for ILC SRF R&D requires extensive infrastructure The U.S. is making good use of existing SRF

assets as well as new ANL/FNAL infrastructure to rapidly expand U.S. SRF R&D capabilities

Infrastructure is needed to support: GDE S0, S1, S2, S4 goals U.S. Industrialization of SRF technology

We have made a lot of progress in FY06-07 We have ambitious plans for FY08 and beyond Effort is resource limited