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2 nd Workshop of the IHEP 1.3 GHz SRF R&D Project and 2nd IHEP-KEK 1.3 GHz SRF Meeting

2 nd Workshop of the IHEP 1.3 GHz SRF R&D Project and 2nd IHEP-KEK 1.3 GHz SRF Meeting. Opening Remark J. Gao December 2-3, 2009, IHEP, Beijing, China. The aim of this workshop and meeting. Review the annual progress of IHEP 1.3GHz SC project and next year plan STF status

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2 nd Workshop of the IHEP 1.3 GHz SRF R&D Project and 2nd IHEP-KEK 1.3 GHz SRF Meeting

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  1. 2nd Workshop of the IHEP 1.3 GHz SRF R&D Projectand 2nd IHEP-KEK 1.3 GHz SRF Meeting Opening Remark J. Gao December 2-3, 2009, IHEP, Beijing, China

  2. The aim of this workshop and meeting Review the annual progress of IHEP 1.3GHz SC project and next year plan STF status Collaboration between IHEP and KEK on 1.3GHz SC R&D items and schedule Discussion on IHEP new SC lab

  3. Chairman: Y.L. Chi Chairman: H. Hayano Chairman: J. Gao

  4. The key technical issues 1.3GHz 9cell SC cavity surface treatment and vertical test (kek) 1.3GHz 9cell SC cavity final design issues (RF calculation, magnetic shielding, helium vessel…) Tuner and LLRF design and fabrication Main coupler design, fabrication and test Cryomodule design and fabrication SC lab facility development (including vertical cryostat, cavity inner surface inspection, T-Mapping, … ） ERL SC cavity issues

  5. Some comments

  6. Yield Plot The gradients for DESY data were off by +2MV/m Not 08/09: large component of 2007, and very small component of 2009 Not 1st or 2nd test: instead, last (DESY) or best (JLab) Included cavities fabricated by ACCEL, ZANON, AES, JLab-2, KEK-Ichiro This is not the ideal data selection from which to infer a production yield Old version, shown at PAC, 2009 Revised version (corrected only for mistakes) - same data shown 11/39 1st test 13/39 2nd test 7/39 3rd test 3/39 4th test 3/39 5th test 1/39 8th test

  7. Standard Process for Yield Plot 7

  8. Comparison ‘Old’ vs ‘New’ Yield Plots Old New

  9. S1 Goal: Reached at DESY PXFEL1reported by H. Weise, at SRF-09 Average field gradient at CMTB : > 31.5 MV/m Note: DESY prepared cavities and assembled with the cryomodule cold mass contributed by IHEP for XFEL prototype

  10. Global Plan for SCRF R&D 10

  11. TTF/FLASH 9mA Experiment Full beam-loading long pulse operation  “S2” • Stable 800 bunches, 3 nC at 1MHz (800 ms pulse) for over 15 hours (uninterrupted) • Several hours ~1600 bunches, ~2.5 nC at 3MHz (530 ms pulse) • >2200 bunches @ 3nC (3MHz) for short periods

  12. BXFEL-ERL Test Facility L-Band（1.3 GHz）Eacc ~ 20 MV/m、Energy gain ~ 60 MeV, Current 10 mA

  13. Main Parameter of ERL Test Linac

  14. Have a good discussion and enjoy our research works and collaboration!Thanks

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