1 / 17

Long Racetrack (LR) Strategy Giorgio Ambrosio

BNL - FNAL - LBNL - SLAC. Long Racetrack (LR) Strategy Giorgio Ambrosio. DOE review - FNAL June 12-14 2006. OUTLINE: LR R&D goals & plans Long Racetrack design (overview) LRS01 Readiness Review Schedule and budget Conclusions. LARP Long Racetracks. LARP TQs. LARP

ata
Download Presentation

Long Racetrack (LR) Strategy Giorgio Ambrosio

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. BNL - FNAL - LBNL - SLAC Long Racetrack (LR) StrategyGiorgio Ambrosio DOE review - FNAL June 12-14 2006 OUTLINE: • LR R&D goals & plans • Long Racetrack design (overview) • LRS01 Readiness Review • Schedule and budget • Conclusions Long Racetrack (LR) strategy – G. Ambrosio

  2. LARP Long Racetracks LARP TQs LARP LQ DS FNAL Long Mirrors LARP Long Quadrupoles Diversity and Risk mitigation for the highest probability of success of the LQs: 2 mechanical designs + 2 scale-ups + design studies Length Scale-Up Plan LENGTH SCALE-UP CHALLENGE: No Nb3Sn accelerator magnet longer than 1m has ever been built LARP should make a successful 4m long quadrupole by end of 09 2006 2007 2008 2009 Long Racetrack (LR) strategy – G. Ambrosio

  3. From 0.3 m to 3.6m Long Racetrack - GOALS • The main goal is to develop long Nb3Sn coils fabrication technology (winding, curing, heat-treatment, impregnation, handling)  target is to reproduce performance of short coils  focus is on coil (Iss) more than magnet performance (training) • Coils will be tested in an Al-shell-based supporting structure (preloaded using bladders and keys) in order to verify the use of this concept for long magnets Performed at BNL Developed at LBNL Coil layout: two flat double-layer racetrack coils Technology successfully developed at LBNL and successfully modified at FNAL Long Racetrack (LR) strategy – G. Ambrosio

  4. Part. addr. by LR Addressed by LR Address. by other Long Quadrupole issues I • Cable and insulation • Fabricate long (~300 m) Nb3Sn cables • Insulate long Nb3Sn cables: sleeve/tape/braided-on-cable • Coil winding and handling (in all phases) • Tooling and procedures • Heat Treatment (Nb3Sn expansion – different CTE) • X-section: “azimuthal gap” as LARP TQ models • Ends (free vs. confined) • Pole gaps (how many? how much?) • Wedges: segmented vs. single-piece LM/DS LM Long Racetrack (LR) strategy – G. Ambrosio

  5. Part. addr. by LR Addressed by LR Address. by other Long Quadrupole issues II • Impregnation • Coil orientation: vertical vs. angle • Epoxy flow: slow impregnation vs. pot-life • Epoxy input: single vs. several ports • Coil-pole interface: bonding vs. sliding surface • Instrumentation and Quench Protection • Quench protection of long Nb3Sn magnets • Long quench heaters • Magnet assembly • Uniform pre-stress application by: • (i) Bladder&key tech., • (ii) Collars+skin • End support and pre-load LM TQ LM TQ Long Racetrack (LR) strategy – G. Ambrosio

  6. Short Racetrack (SRS02), to introduce TQ coils fabrication tech. • Same fabrication technology of LARP Technological Quads (TQ) coils • Ceramic binder, curing under pressure, • heat treatment with tight coil dimension control (“horizontal” gap) • Long Racetrack (LRS02), test of long coils with TQ fabric. techn. Heat treatment Curing Long Racetrack R&D - Plan • Short Racetrack (SRS01), to validate technology transfer to BNL • Same as LBNL Small Racetrack series • Long Racetrack (LRS01), 1st test of long coils, as simple as possible • Very similar to SRS01, except a few design modifications for long coils: • Side rails instead of horse-shoe, • Larger yoke OD, thicker shims and coil skins Long Racetrack (LR) strategy – G. Ambrosio

  7. Supporting structure - plan Al-shell-based supporting structure(preloaded by bladders-&-keys) have successfully been used in 1m-long magnets.  Long magnets require long shells. PLAN: • design, procure and assemble a supporting structure with long shell • Test with a dummy coil package (at LBNL) • Pressure sensitive paper and strain gauges • Optimize structure • Test with a dummy coil package (at BNL) • Possibly using real coil parts and practice coil • Use for LRS01 and LRS02 Long Racetrack (LR) strategy – G. Ambrosio

  8. Technology transfer: LR  LQ GOAL: to maximize the transfer of technology, information and expertise from the Long Racetrack R&D to the Long Quadrupole R&D • The lead engineer of the Long Quadrupole R&D (Fred Nobrega, FNAL) is involved in all steps of the Long Racetrack R&D (design, assembly, test and analysis), and will visit BNL during key operations (winding, impregnation, coil inspection …) • The lead technician of the Long Quadrupole R&D (Marty Whitson, FNAL) will be at BNL during the major steps of the coil fabrication for LRS01 and LRS02 • The L2 coordinator of Supporting R&D (G. Ambrosio) is coordinating and over-viewing all LR activities • Trips planned in July-Sept.: PC winding, impregnation and inspection Long Racetrack (LR) strategy – G. Ambrosio

  9. LRS01 Design Report TABLE OF CONTENTS 1. INTRODUCTION 2. CONDUCTOR CHARACTERISTICS By A. Ghosh 3. MAGNETIC DESIGN By P. Ferracin 4. COIL FEATURES AND FABRICATION By J. Schmalzle, and D. Dietderich 5. MECHANICAL DESIGN By P. Ferracin, D. Cheng, and R. Hafalia 6. MAGNET ASSEMBLY By D. Cheng, R. Hafalia, P. Ferracin, and J. Schmalzle 7. QUENCH PROTECTION By J. Muratore 8. COIL INSTRUMENTATION By G. Ambrosio, and P. Wanderer References https://dms.uslarp.org/MagnetRD/SupportingRD/LongMagnetDevelopment/LRS01_design_V18.doc Long Racetrack (LR) strategy – G. Ambrosio

  10. Long Racetrack - Design Long Racetrack (LR) strategy – G. Ambrosio

  11. “Low pre-stress & rigid boundary” Pre-stress provided by Bladder and keys (293 K) Aluminum shell thermal contraction (4.2 K) After cooldown Peak coil stress: 35 MPa Most of the force to the rails and pole At peak field Current has opposite direction in coil A and B Peak coil stress: 75 MPa 2D mechanical design Aluminum Iron A B Coil S. steel Long Racetrack (LR) strategy – G. Ambrosio

  12. Aluminum shell Single piece Length: 3.6 m Iron yokes 50 mm thick laminations Iron pads Half length (1.8 m) Stainless steel skins Full length (3.6 m) Bladders Half length (1.8 m) Keys and shims Half length (1.8 m) LR longitudinal design Long Racetrack (LR) strategy – G. Ambrosio

  13. LRS01 Readiness Review April 24-25 “Given the upcoming results from SRS01, the fabrication and delivery of various parts and tooling, and the inspection and commissioning of those parts and tooling, the committee feels the program should keep proceeding. • We do feel that several commissioning plans and detail designs should be more carefully documented. • Extend the ‘what if’ analysis to include ‘success’ in the LRS01 test and how the program might be extended in this scenario. • For instance, a mirror race track configuration could test other regions of the coils for degradation and coil prestress / end load effects” Partially done, partially in progress Possible back-up plan in FY08 Long Racetrack (LR) strategy – G. Ambrosio

  14. SRS01 test Support. Structure Oven LRS01 test SRS02 test LRS02 test Long Racetrack Schedule Long Racetrack (LR) strategy – G. Ambrosio

  15. Long Racetrack  Long Quad • Expertise and test results of the Long Racetrack R&D will be very valuable for the Long Quadrupole R&D • LQ coil design review: Feb 9, 07  Feedback by: • LR practice coil fabrication and inspection • LRS01 coils fabrication • LRS01 magnet test • LQx01 coil fabrication start: Nov 6, 07  Feedback to coil fabrication procedures by: • All of the above + LRS02 coils fabrication and magnet test • LQ mechanical design selection: May 15, 07  Feedback by: • LR supporting structure tests at room temperature • LRS01 magnet test Long Racetrack (LR) strategy – G. Ambrosio

  16. FY07 budget (in progress) • Complete coil fabrication and assembly of LRS01 • Coil fabrication and assembly of SRS02 and LRS02 • Test of Supporting Structure • Test LRS01, SRS02 and LRS02 Coordination through: • Weekly conference calls or video-meetings of LR working group (BNL, LBNL, FNAL) • Weekly reports by task leaders • Minutes, reports, drawings, pictures, … on the LARP web site Long Racetrack (LR) strategy – G. Ambrosio

  17. Conclusions • The Long Racetrack R&D has almost completed the 1st phase (Technology Transfer & LR design) • SRS01 will be tested next week • The design of LRS01 is almost complete • Successfully passed LRS01 Readiness Review • Despite some delays the Long Racetrack R&D is on track to give very valuable feedback to the LQ R&D  Feedback to LQ coil tooling design • Feedback to LQ coil fabrication procedures • Feedback to LQ mechanical design selection Long Racetrack (LR) strategy – G. Ambrosio

More Related