html5-img
1 / 20

1.3 GHz SRF Cavity R&D Plan

1.3 GHz SRF Cavity R&D Plan. Jiyuan Zhai ILC Group, IHEP 3 rd IHEP-KEK 1.3 GHz SRF Meeting, 7 Dec 2010, Beijing. Outline. 2011 Plan IHEP-01 (LG LL 9-cell w/o HOM) 2 nd VT IHEP-02 (LG LL 9-cell w/ HOM) fab, VT and dressing IHEP-03 (FG TESLA 9-cell w/ HOM) fab and VT 2012 and after

ewa
Download Presentation

1.3 GHz SRF Cavity R&D Plan

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1.3 GHz SRF Cavity R&D Plan Jiyuan Zhai ILC Group, IHEP 3rd IHEP-KEK 1.3 GHz SRF Meeting, 7Dec 2010, Beijing

  2. Outline • 2011 Plan • IHEP-01 (LG LL 9-cell w/o HOM) 2nd VT • IHEP-02 (LG LL 9-cell w/ HOM) fab, VT and dressing • IHEP-03 (FG TESLA 9-cell w/ HOM) fab and VT • 2012 and after • IHEP-02 horizontal test • ERL (7-cell and 2-cell), 2011-2015 • ADS (beta 0.8, 1.3 GHz 9-cell cavity) , 2012-2015 CW, High Current

  3. IHEP-01 large grain 9-cell cavity • Fabrication: 2009.2 – 2010.4 • Processing: 2010.4 -5 • 1st VT: 2010.6-7 • vacuum 2~5E-7 Pa • T-mapping, no X-ray mapping • Kyoto camera inspection • replica • 20 MV/m (cell #9, #2 quench) • defects not exactly identified • Field emission • CP stains or iris defects

  4. IHEP-01 defects and reprocessing Quench defects Field emitters CP stains – 2nd CP attention Iris defects – no way to remove, maybe not matter • X-ray photo (cell #9 slot) • Local grinding (cell #9) • CBP #9, 270°, 20 MV / m 1 mm 1 mm equator #4, 156° > 25 MV/m #3, 85° > 21 MV/m #2, 340° 33 MV/m

  5. IHEP-01 2nd processing and VT schedule

  6. IHEP-02 large grain cavity with HOM • low loss shape • end cell w/o HOM optimization • TESLA HOM coupler • quasi-TESLA end plate • tuner and bellow in the middle • Ti helium vessel • magnetic shield tubes inside • magnetic shield end caps outside • plug-compatibility • install into IHEP short cryomodule • distance from input coupler to end cell longer ( > 54 mm) • total length longer

  7. IHEP-02 End Group • IHEP-02 will be tested in FNAL or JLAB in 2011 for several times • try to adopt TELSA flanges and end plate to avoid new tooling, transitions and fixtures, except the input coupler port flange

  8. IHEP-02 Plan

  9. IHEP-02 Interfaces (FNAL) • only 1 of the 6 cavity flanges is different from TESLA • RF input through input coupler port, fixed coupling (what Qext?) • order input coupler flange and antenna from Kyocera • order helicoflex (CS20M45CI15037) from Usui • make new EP sealing for input coupler port • bottom flange evacuation (explosive and vacuum valve) • no electron monitor (top flange blanked) • HOM coupler pickups blanked • limited number of thermal sensors • second sound transducers can’t replace T-mapping system • no CP facility for the 1.3 GHz 9-cell cavity, CBP available • make same FNAL/ANL jig for EP, HPR, CBP… • pretuning only vertically (can’t use auto-machine due to shape) • bring manually tuning jig (mid and end) and software • fixed when Shekhar Mishra visit IHEP (Feb 2011)

  10. IHEP-02 Interfaces (JLAB) • VT same with FNAL • EP: cavity length, sealing, slight difference in the beam tube diameter, EP cathode rod available • CP available • Kyoto camera and QM1 • limited T-mapping • horizontal pre-tuning OK • reduced new interfaces as MHI-08 • sapphire HOM antenna for horizontal test • order antennas from Kyocera • Bob Rimmer IHEP visit (Feb 2011)

  11. IHEP-03 fine grain TESLA cavity plan IHEP-03 can be a backup for IHEP-02 module test, except the input coupler port. Or install to STF phase 2 CM2?

  12. I: Low Emittance SR II: BXERL 650m 1100m Beijing Light Source (2016-2025) 250MeV Linac • Main Ring • E=5 GeV • C=1200m • ~ 1 nm Booster C=300m Return Gun 5 GeV SRF Linac 1.3 GHz 7-cell Cavities

  13. Beijing Science Park 50 km North of downtown Beijing, include New SRF Lab

  14. ERL test facility cavities • Similar to KEK cERL • 35 MeV, 10 mA, 1.3 GHz RF • Photocathode DC gun and two 2-cell cavities as injector • Two 7-cell cavities of the main linac • 2010-2011: design (CDR-0 finished) • 2012-2013: fabrication and test (6 cavities) • 2014-2015: dressing, horizontal and beam test • Input couplers and HOM absorbers are challenging

  15. X区 ERL Test Facility in Hall #1 at IHEP campus 50 m x 12 m = 600 m2 Preliminary cost estimation : ~ 22 M USD 15

  16. China ADS 2022 ADS Prototype Reactor：~100 MW Acce：600~1000 MeV / 10 mA 2032 ADS Demo Reactor：~1000 MW Accel：1.5 GeV/ > 10 mA 2016 CIADS (1.7 B CNY) Reactor：~10 MW Accelerator： 50 MeV / 10 mA 120 MeV ? SC RFQ Possible site: Ordos, Inner Mongolia IS

  17. ADS Ordos BEPCII and BESIII 1800 km Jin Ping CJPL 2400 m deep Dayabay I & II CSNS upgrade ADS and China’s Future Neutrino Physics Experiment

  18. High energy end for the ADS linac Linac configuration under discussion 1.3 GHz 9-cell cavity (beta=0.8) SRF accelerator unit (2012-2015)

  19. SRF facilities for cavity development • Vertical test • Ultrapure water, High pressure rinsing system, clean room (to be qualified) • VT Dewar and helium recycling • New cryogenics system • T-mapping • EP for high Q and high gradient • New SRF lab, EBW machine, press and vertical trimming machine…

  20. Summary 2006-2010 • IHEP-01 9-cell cavity made the first try on the technique and infrastructures needed for the multi-cell cavity development. • IHEP-02 or IHEP-03 will demonstrate the 1.3 GHz SRF integration in IHEP, providing experience for ERL and ADS R&D in China. • ILC 1.3 GHz SRF technology will extend to various large scale projects in China - electron or proton, pulsed or CW machines. • Infrastructures and industrial partners of certain scale and qualification will soon be the limit for this development. 2011-2015 2020 -2030

More Related