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SPX - Cavity WBS U1.02.01.02.05, U1.03.03.05, U1.03.03.12

SPX - Cavity WBS U1.02.01.02.05, U1.03.03.05, U1.03.03.12. Genfa Wu SRF Scientist Accelerator Systems Division/RF Group DOE Lehman CD-2 Review of APS-Upgrade 4-6 Decem ber 2012. Outline. WBS Scope of SRF Cavities for SPX Requirements Design Risks considered ES&H Cost Schedule

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SPX - Cavity WBS U1.02.01.02.05, U1.03.03.05, U1.03.03.12

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  1. SPX - CavityWBS U1.02.01.02.05, U1.03.03.05, U1.03.03.12 • Genfa Wu • SRF Scientist • Accelerator Systems Division/RF Group • DOE Lehman CD-2 Review of APS-Upgrade4-6 December 2012

  2. Outline • WBS Scope of SRF Cavities for SPX • Requirements • Design • Risks considered • ES&H • Cost • Schedule • Summary DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  3. SPX Cryomodules / Cavities Scope and WBSU1.02.01.03 & U1.03.03 • Fabricate, process and test 8 deflecting cavities for two SPX cryomodules • Attach helium vessels to cavities and qualify the cavities for string assembly DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  4. HOM Damper Deflecting Cavity and Tuner LOM Damper HOM Damper Mark-II CCA3 design Input Coupler DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  5. Cavity Fabrication, Processing and Testing • Large grain ingot slicing • Niobium RRR  300 • CNC machining • Chemical etching/polishing • E-beam welding • Chemical polishing (BCP) • Hydrogen bake out at 600C 10 hours • Light chemical polishing (BCP) • HPR/clean room assemble • Low temperature baking • Vertical testing • Helium vessel dressing • Vertical testing • Horizontal testing (optional) DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  6. Deflecting Cavity Performance • CCA2 used indium seal • CCA3-1 used Al/Mg seal • CCA3-1 used Al/Mg + Be/Cu RF shield • LOM coupler Qext was sensitive to the coupler symmetry (solved) • Heating on Al/Mg gasket and RF shield limits performance • Particulates in high surface B field area Further processing and test • Additional HPR • Better RF shield • Or adopt indium seal Mark-II Cavity CCA2 exceeds the gradient and Q0 specification DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  7. Cavity Vacuum Seals HOM Damper LOM Damper • Cavity flange ports use Al/Mg seals on round flanges • Broad band RF transmission requires RF shield to remove the RF pocket HOM Damper Magnetic field in LOM coupler Input Coupler FPC/HOM LOM DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  8. SPX0/SPX Helium Vessel Design Helium Return Nitronic Rod Mount Tuner Attachment Points Helium Supply DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012 Slide from K. Wilson

  9. SPX0/SPX Tuner Design DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012 Courtesy of Joe Matalevich

  10. SPX0/SPX Tuner Design Status: Cavity Measurements • SPX Cavity (CCA3-1) Exercised in Modified JLAB Tuner Test Stand • Cavity instrumented with 4 strain gages • Axial Force, Length, and Frequency measured as cavity stretched Courtesy of Joe Matalevich DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  11. SPX0/SPX Tuner Design Status: Cavity Measurements • Modeling Validated Courtesy of Joe Matalevich DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  12. Horizontal Test Stand • Horizontal cavity test at ANL/ATLAS • 5 kW amplifier • 64 W Cooling @2K • Analog and Digital RF • Verify helium vessel and tuner design • Test LLRF control • Measure RF noise • Measure microphonics • Test fast detuning Horizontal test of a dressed cavity is scheduled in December 2012 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012 Courtesy of Joel Fuerst

  13. SPX Cavity Risks • Cavity gradient and Q0 degradation • We plan to use other processing and state of art post processing methods to both increase gradient limit and Q0. DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  14. SPX Cavity ES&H • Integrated Safety Management System (ISMS) • APS-U Project following Argonne’s ISMS program requirements • Argonne Integrated Safety Management System (ISMS) Description recently revised and submitted to DOE ASO • Describes framework for integrating ESH requirements with mission objectives • References Argonne LMS procedures which implement specific portions of the ISMS • Identify General Safety Requirements to Specific WBS Level • RF, Radiation, oxygen deficiency, and cryogenic hazards are mitigated through training, administrative control and engineering control • Chemical hazard (BCP) are mitigated through training, administrative control and engineering control at collaborating site (JLAB) • Chemical hazard (EP) are mitigated through Fermilab’straining, administrative control and engineering control DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  15. SPX Cryomodules / Cavities Scope and WBSU1.02.01.03 & U1.03.03 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  16. SPX Cryomodules / Cavities Obligation Profile U1.02.01.03 & U1.03.03 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  17. SPX R&D and Production Milestones U1.02.01.03 & U1.03.03 SPX0 Cryomodule SPX Cryomodules DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  18. SPX Cryomodules / Cavities Milestones U1.02.01.03 & U1.03.03 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  19. SPX Cryomodules / Cavities Summary Schedule U1.02.01.03 & U1.03.03 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  20. SPX Cryomodules / Cavities BOE Contingency U1.02.01.03 & U1.03.03 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  21. Work after CD-2 • Complete SPX0 cavity processing and prepare for SPX0 cryomodule assembly • Develop a cavity temperature mapping system for SPX cavity processing and testing • Develop other processing and state of art post processing methods to increase both gradient limit and Q0 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

  22. Summary • Deflecting cavity prototypes proof of principle completed • Three Mark-II Cavities are fabricated, processed and being tested for SPX R&D • Prototypes of Helium vessel is completed • Horizontal cavity test is scheduled in December(2012) to verify tuner design • If tuner test shows good performance, its design will be final for SPX cavities • The cost is $17,592k • Niobium Material is $355k. Fabrication is $137k • Cavity unit cost is $61,397.28 • We are ready for CD2 DOE Lehman CD-2 Review of the APS Upgrade Project 4-6 December 2012

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