1 / 19

Design Status of Fermilab SRF Cryomodules

Don Mitchell, FNAL. 3.9 GHz Cryomodule for DESY. Don Mitchell, FNAL. 3.9 GHz Cryomodule Design. Design effort currently on cavity processing and testing fixtures.Effort will then focus on completing the following design details: helium vessel, bladetuner, magnetic shields, and misc. coldmass components; all of which are at the 90% - 95% level of completion.

zenia
Download Presentation

Design Status of Fermilab SRF Cryomodules

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. Design Status of Fermilab SRF Cryomodules 3.9 GHz (for DESY) & TTF III+ (kit from DESY) & FNAL Generation III+ & ILC T4CM Don Mitchell, FNAL January 11, 2006

    2. Don Mitchell, FNAL 3.9 GHz Cryomodule for DESY

    3. Don Mitchell, FNAL 3.9 GHz Cryomodule Design Design effort currently on cavity processing and testing fixtures. Effort will then focus on completing the following design details: helium vessel, bladetuner, magnetic shields, and misc. coldmass components; all of which are at the 90% - 95% level of completion

    4. Don Mitchell, FNAL TTF III+ is our design reference for ALL 1.3 GHz Cryomodules

    5. Don Mitchell, FNAL TTF III+ Cryomodule

    6. Don Mitchell, FNAL Americanized TTF III+ Cryomodule

    7. Don Mitchell, FNAL Americanized TTF III+ (cont.) Work has begun on: Cryostat Vessel Cavity Helium Vessel Main Couplers

    8. Don Mitchell, FNAL ILC Design Considerations Move quad package to middle of cryomodule to achieve better support and alignment. Shorten cavity-to-cavity interconnect and simplify for ease of fabrication and cost reduction. Possible superconducting joint. Minimize direct heat load to cavity through MC. Simplify the assembly procedure. MLI redesign to reduce hands-on labor costs. More robust to survive shipping. Reliability of tuner motors in cold operation. Etc. (we’ve heard many suggestions)

    9. Don Mitchell, FNAL

    10. Don Mitchell, FNAL ILC Generation 4 (not the final ILC design) Small changes to address major concerns. Magnet alignment and vibration issues. Cryomodule with and without magnet pkg. Possible option for separate magnet cryovessel

    11. Don Mitchell, FNAL

    12. Don Mitchell, FNAL

    13. Don Mitchell, FNAL T4CM Proposed Cavity w/ Bladetuner

    14. Don Mitchell, FNAL

    15. Don Mitchell, FNAL

    16. Don Mitchell, FNAL Proposed 4th Generation Design 2 Vessels, ? 1293.8 mm in length (w & w/o Magnet package) Cavity string supported and aligned by 3 support posts. Magnet independently aligned but still supported from the 300mm HGR pipe. (HGR Pipe may need to be resized) Support post locations may be identical in both vessels to simplify the tooling. HOM absorber in interconnect region. Smaller cav-to-cav connection (71.8mm) BPM, Quad magnet, and steering magnets are combined into one magnet package. Total length currently assumed to be 1222 mm. TTF III cavity utilizes short end-tube for both ends. Length reduced by 37mm. Possible use of Bladetuner due to the shortened cavity length. New Magnetic Shield design. All ports and flanges will be metric and ISO style.

    17. Don Mitchell, FNAL T4CM will differ from Type III+ in the following general areas Cavity iris-to-iris spacing reduced to 283 mm Reduces length from 12.20 to about 11.8 m, get ~0.75 packing (but increased magnet length negates this save in overall length, in fact, making T4CM 356.4 mm longer) Slow tuner modified to allow closer cavity-to-cavity spacing (could mean switching to bladetuner design, but choice still open) Fast tuner -- new design Quad/corrector/BPM package under center post, hung from 300 mm tube, not on rollers (diverging from X-FEL) Two major module types, one with quad and one without

    18. Don Mitchell, FNAL More differences of T4CM from Type III+ Interconnect features modified to accommodate input coupler at end of cryostat. Quad current leads may be new, with local impact on thermal shields and vacuum vessel ports. May need access ports as well. Provisions for quad power lead connection at center of module. Some pipe sizes will be increased for lower pressure drops with high flow rates -- would like to retain long cryogenic unit lengths up to limit of 300 mm pipe and cryo plants. Present effort includes re-analysis of heat loads, flow rates, and cryogenic system thermal process.

    19. Don Mitchell, FNAL Some critical open design issues Quad/corrector/BPM package is a major unknown right now and goes into the heart of the module Tuner details, slow and fast, but especially fast tuner Vibrational analysis, which will be compared to measurements for verification of the model for future design work Development of module and module component test plans Verification of cavity positional stability with thermal cycles Design of test instrumentation for the module Robustness for shipping, analysis of shipping restraints and loads, shipping specifications Active quad movers(?) A complication

    20. Don Mitchell, FNAL Probable Design Schedule 3.9 GHz Cryomodule Design Completion: 2nd QTR 06 BCP fixture processing currently underway Small design modifications needed to cryomodule components Drawings must be checked, approved, and released Few resources available at this time Americanized CRYO III+ 3 to 4 months of detail drawings Feb – May ’06 ~ 3 detailers and 1 engineer ILC T4CM 12 - 24 months (2006 - 2007) 1st international meeting in January 2006, CERN Assign responsibilities (FNAL to possibly take lead) Engineering issues must be primary focus Magnet/BPM package (internal or external to cryomodule) Vibration issues Tuners, etc. Integrate into module design Designers will get involved once engineering issues are solved

More Related