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MICE Cooling Channel Magnets: Spectrometer Solenoid Procurement RF Module Coupling Coil Proposal Steve Virostek Lawrence Berkeley National Lab NFMCC 07.

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Presentation on theme: "MICE Cooling Channel Magnets: Spectrometer Solenoid Procurement RF Module Coupling Coil Proposal Steve Virostek Lawrence Berkeley National Lab NFMCC 07."— Presentation transcript:

1 MICE Cooling Channel Magnets: Spectrometer Solenoid Procurement RF Module Coupling Coil Proposal Steve Virostek Lawrence Berkeley National Lab NFMCC 07 @ UCLA January 31, 2007

2 MICE: Spectrometer Solenoid & Coupling CoilPage 2 Steve Virostek - Lawrence Berkeley National Laboratory MICE Cooling Channel Layout Spectrometer Solenoid 1 AFC Module 1 AFC Module 2 RFCC Module 1 RFCC Module 2 Spectrometer Solenoid 2 AFC Module 3

3 MICE: Spectrometer Solenoid & Coupling CoilPage 3 Steve Virostek - Lawrence Berkeley National Laboratory Spectrometer Solenoid Overview Order for two spectrometer solenoid magnets was placed with Wang NMR by LBNL in June ‘06 Design review was held by Wang on Sept 6, 2006 - Complete design package book provided to LBNL Detailed magnet design is now complete Superconducting wire was provided by LBNL (IIT) First machined coil former completed last week Coil winding will begin within two weeks First magnet scheduled to be shipped end Aug 07

4 MICE: Spectrometer Solenoid & Coupling CoilPage 4 Steve Virostek - Lawrence Berkeley National Laboratory The spectrometer solenoids provide a uniform field for the scintillating fiber tracker & match the uniform field section into the rest of MICE The long center coil with its two short end coils are designed to generate a 4 T field –Field uniformity is better than 0.3% over a 1000 mm long, 300 mm diameter region –Uniformity is better than 0.1% over most of the region Purpose of the Spectrometer Solenoids

5 MICE: Spectrometer Solenoid & Coupling CoilPage 5 Steve Virostek - Lawrence Berkeley National Laboratory Spectrometer Solenoid on Axis Field MICE Field on Axis in the Flip Mode

6 MICE: Spectrometer Solenoid & Coupling CoilPage 6 Steve Virostek - Lawrence Berkeley National Laboratory End Coil 2 Center Coil Match Coil 1 End Coil 1 Match Coil 2 Coil Cover Liquid Helium Space 490 mm 690 mm 2544 mm Coil Spacer Spectrometer Solenoid Cold Mass

7 MICE: Spectrometer Solenoid & Coupling CoilPage 7 Steve Virostek - Lawrence Berkeley National Laboratory First Completed Coil Winding Form

8 MICE: Spectrometer Solenoid & Coupling CoilPage 8 Steve Virostek - Lawrence Berkeley National Laboratory 1.00 mm 1.65 mm 41  m Nb-Ti 222 Filaments RRR > 70 @ 4.2 K Spectrometer Solenoid Conductor Cu/SC = 3.9 ± 0.4 Twist pitch: 19±3 mm 121.5 km purchased

9 MICE: Spectrometer Solenoid & Coupling CoilPage 9 Steve Virostek - Lawrence Berkeley National Laboratory Single piece 6061-T6 aluminum coil former Each layer wet wound using Stycast 2850 FT 2.5 mil thick fiberglass between winding layers Aluminum coil banding will provide hoop force support and ensure coils are tight after cooldown Conductor joints are to be lapped by at least 24” to minimize the I 2 R losses Passive quench protection will be provided by a system of diodes & resistors Design Overview (coil construction)

10 MICE: Spectrometer Solenoid & Coupling CoilPage 10 Steve Virostek - Lawrence Berkeley National Laboratory 300 K Support End 60 K Support Intercept Support Band 4 K Support End Cold Mass Assembly Cold Mass Support System (50 T axial force)

11 MICE: Spectrometer Solenoid & Coupling CoilPage 11 Steve Virostek - Lawrence Berkeley National Laboratory Lead Neck He Gas Pipe 4.2 K Coolers Condenser Tank Liquid Pipe Cold Mass 4K End 60K Intercept 300K End Cold Mass Support

12 MICE: Spectrometer Solenoid & Coupling CoilPage 12 Steve Virostek - Lawrence Berkeley National Laboratory Indirect cooling using liquid helium condensers Baseline design will use two cryocoolers but will allow mounting of a third cooler, if necessary High T C leads will be accessible by means of a removable cover plate 60K (or less) thermal shield is conductively cooled using the first stage of the cryocoolers Thermal shield copper mass will protect the high T C leads and provide extra cooling margin Design Overview (coil cooling)

13 MICE: Spectrometer Solenoid & Coupling CoilPage 13 Steve Virostek - Lawrence Berkeley National Laboratory He Filler Neck Lead Neck Cold Mass Support PMT Iron Shield Space for Radiation Shield Support Stand Cooler Neck

14 MICE: Spectrometer Solenoid & Coupling CoilPage 14 Steve Virostek - Lawrence Berkeley National Laboratory Helium vessel (Al) and vacuum vessel (304SS) to be designed & tested according to PV code He vessel will contain two relief paths for safety Unidirectional S-2 fiberglass cold mass supports using race-track shaped links (safety factor of 4) 304 SS support design derived from LBNL/Oxford Cold mass support design allows cold shipping Design Overview (PV’s & supports)

15 MICE: Spectrometer Solenoid & Coupling CoilPage 15 Steve Virostek - Lawrence Berkeley National Laboratory 1000 mm ~330 mm The Blue rings are the tracker scintillating fiber planes. Plane spacing: 150mm, 180mm, 200mm and 470mm. All fiber planes are in the magnet good field region.  B/B = ±0.105% at R=0, L=1050 mm  B/B = ±0.262% at R=150 mm, L=1050 mm MICE Scintillating Fiber Tracker Module

16 MICE: Spectrometer Solenoid & Coupling CoilPage 16 Steve Virostek - Lawrence Berkeley National Laboratory The magnets can be cooled with a pair of 1.5 W pulse tube coolers The temperature of the cooler first stage is about 52 K instead of 60 K Given the temperature margin, the magnets can operate at 4.5 K The peak field at the cooler rotary slide valve is about 0.05 T Estimated Heat Loads

17 MICE: Spectrometer Solenoid & Coupling CoilPage 17 Steve Virostek - Lawrence Berkeley National Laboratory Magnet Coil Load Lines Margin @ 4.2 K: M1 = ~1.7 K M2 = ~ 1.9 K E1 = ~ 1.6 K C = ~ 2.0 K E2 = ~1.5 K

18 MICE: Spectrometer Solenoid & Coupling CoilPage 18 Steve Virostek - Lawrence Berkeley National Laboratory Quench Protection & Power Supply Hookup

19 MICE: Spectrometer Solenoid & Coupling CoilPage 19 Steve Virostek - Lawrence Berkeley National Laboratory Magnets to be cooled to as low as 45 K (1 st stage) and 3.8 K (2 nd stage) using two 1.5 W pulse tube coolers Magnetic field at the cooler rotary valve motors is ~0.05 T (no iron shielding needed on the valve motors) Cryocoolers (up to three) can be installed and removed without breaking cryostat vacuum Coolers connected to He liquid bath w/a thermal siphon heat pipe to reduce  T between coil & cooler 2 nd stage Four Cryomech 1.5 W pulse tube coolers ordered by IIT – first unit shipping to Wang on February 19th Pulse Tube Cryocoolers

20 MICE: Spectrometer Solenoid & Coupling CoilPage 20 Steve Virostek - Lawrence Berkeley National Laboratory Magnet Power Supplies Three power supplies of +300 A at ±10 V for the center and two match coils (shared for 2 magnets) - two quadrant power supply - current regulation of < ±0.01% from 50 A to 275 A Four power supplies of ±50 A at ±5 V for the two end coils (2 per magnet) - four quadrant power supply - current regulation of < ±0.03% from 5 A to 45 A Power supply specification is complete Lead time is 3 months – order to be placed soon

21 MICE: Spectrometer Solenoid & Coupling CoilPage 21 Steve Virostek - Lawrence Berkeley National Laboratory Schedule Summary

22 MICE: Spectrometer Solenoid & Coupling CoilPage 22 Steve Virostek - Lawrence Berkeley National Laboratory Detailed magnet design is now complete 1 st coil former arriving at Wang this week High T C leads will arrive early February Cryomech cryocoolers (4 each) on order Power supply spec is complete – order soon First magnet to be shipped by end Aug 07 Second magnet to follow 1 month later Summary

23 MICE Coupling Coil Fabrication Plan Proposal Lawrence Berkeley National Laboratory (LBNL) Institute of Cryogenic & Superconductivity Technology (ICST) at the Harbin Institute of Technology

24 MICE: Spectrometer Solenoid & Coupling CoilPage 24 Steve Virostek - Lawrence Berkeley National Laboratory Progress towards LBNL/ICST Collaboration Scope: design, fabricate and test one MuCool coil and two MICE coupling coils Preliminary discussions began last year –Mike Green visit to ICST 4/06 and at MICE CM15 & CM16 LBNL visit to ICST at Harbin in December ‘06 –Attendees: M. Zisman, D. Li, S. Virostek, M. Green –ICST presented preliminary coupling coil designs Design work is continuing by ICST engineers Unresolved issues: level and sources of funding

25 MICE: Spectrometer Solenoid & Coupling CoilPage 25 Steve Virostek - Lawrence Berkeley National Laboratory MICE Cooling Channel

26 MICE: Spectrometer Solenoid & Coupling CoilPage 26 Steve Virostek - Lawrence Berkeley National Laboratory Coupling Coil MICE RF Cavity & Coupling Coil Module

27 MICE: Spectrometer Solenoid & Coupling CoilPage 27 Steve Virostek - Lawrence Berkeley National Laboratory RFCC Module Cross Section RF Cavities 8” Cryopump Pulse Tube Cryocooler Coupling Coil Vacuum Manifold RF Cavity Vacuum Vessel

28 MICE: Spectrometer Solenoid & Coupling CoilPage 28 Steve Virostek - Lawrence Berkeley National Laboratory Goals of the ICST/LBNL Collaboration Develop a coupling coil design for MICE, MuCool –Preferably one design that meets both project’s needs Fabricate and test three coupling coils at ICST –Coil for MuCool is needed as soon as possible –Two MICE coils can follow later (if appropriate) Integrate the coil design with the requirements of the MICE RF/Coupling Coil Module –Issues: RF vacuum vessel, RF couplers, tuners, forces

29 MICE: Spectrometer Solenoid & Coupling CoilPage 29 Steve Virostek - Lawrence Berkeley National Laboratory LBNL Role in the Coil Development Develop engineering concept & initial analysis Specification of coil parameters & requirements Provide project oversight and design approval Procurement of superconductor, cryocoolers, leads, power supplies, etc. for all three coils Funding to ICST for added cost of MuCool coil –Additional material: coil winding form, cryostat, coil vacuum vessel, MuCool coil support structure

30 MICE: Spectrometer Solenoid & Coupling CoilPage 30 Steve Virostek - Lawrence Berkeley National Laboratory ICST Role in the Coil Development Perform engineering analyses and detailed design of the MICE/MuCool coupling coil Fabricate & test one MuCool coil with funding, material and components provided by LBNL Provide effort and material to complete the fabrication and testing of the two MICE coils Contribute to the collaboration by reporting progress at MICE meetings and in publications

31 MICE: Spectrometer Solenoid & Coupling CoilPage 31 Steve Virostek - Lawrence Berkeley National Laboratory Coupling Coil Specification (LBNL) General system description Applicable codes and standards Coil parameters and requirements Inspection and testing plans Packing, shipping and handling List of LBNL furnished materials Quality assurance requirements Conceptual design drawings

32 MICE: Spectrometer Solenoid & Coupling CoilPage 32 Steve Virostek - Lawrence Berkeley National Laboratory Coupling Coil Design Review Coupling coil design review to be held by ICST - Attendees: LBNL, MICE collaborators, other experts - Complete design package documentation to be provided - Follow up on issues & actions items identified in review Present engineering analyses and calculations All fabrication drawings ready for review Fabrication and assembly plans and procedures Coil test plans: electrical, thermal, mechanical Quality assurance and process control plans

33 MICE: Spectrometer Solenoid & Coupling CoilPage 33 Steve Virostek - Lawrence Berkeley National Laboratory ICST Coupling Coil CAD Model Cryo-cooler Helium vessel Vacuum vessel LHe piping Cool-down supply piping Supports VHe piping Cool-down return piping Vacuum port Bayonets Leads Recondenser

34 MICE: Spectrometer Solenoid & Coupling CoilPage 34 Steve Virostek - Lawrence Berkeley National Laboratory Coupling Coil Components (ICST) Cryo-cooler Winding form Support band Insulation Thermal Shield He vessel cover Coil windings Vacuum vessel Cold mass supports Leads

35 MICE: Spectrometer Solenoid & Coupling CoilPage 35 Steve Virostek - Lawrence Berkeley National Laboratory Cooling Circuit Details (ICST) Cryo-cooler LHe piping Cool-down return piping VHe piping Cool-down supply piping Bayonets Leads Recondenser

36 MICE: Spectrometer Solenoid & Coupling CoilPage 36 Steve Virostek - Lawrence Berkeley National Laboratory Cryocooler and Condenser Details (ICST)

37 MICE: Spectrometer Solenoid & Coupling CoilPage 37 Steve Virostek - Lawrence Berkeley National Laboratory Helium Vessel Thermal Analysis (ICST) 6061-T6 Al 4.2K The coil is cooled by conduction with liquid helium.

38 MICE: Spectrometer Solenoid & Coupling CoilPage 38 Steve Virostek - Lawrence Berkeley National Laboratory Helium Vessel Stress Analysis (ICST) 25mm thk aluminum Supports Radial, longitudinal and gravity forces and 4 bar internal pressure.

39 MICE: Spectrometer Solenoid & Coupling CoilPage 39 Steve Virostek - Lawrence Berkeley National Laboratory Coupling Coil Magnetic Field Analysis (ICST) B max = 6.58T (ICST analysis), B max = 6.51T (MICE conceptional design)

40 MICE: Spectrometer Solenoid & Coupling CoilPage 40 Steve Virostek - Lawrence Berkeley National Laboratory MICE Channel Magnetic Field (ICST) Flip Mode (Case1)

41 MICE: Spectrometer Solenoid & Coupling CoilPage 41 Steve Virostek - Lawrence Berkeley National Laboratory ICST Proposed Coil Winding Facility

42 MICE: Spectrometer Solenoid & Coupling CoilPage 42 Steve Virostek - Lawrence Berkeley National Laboratory Project Deliverables from ICST Design package containing fabrication drawings One MuCool coil with dedicated support (ASAP) Two coupling coils for the MICE Project Fabrication process documentation Magnet testing documentation Coupling coil project final report

43 MICE: Spectrometer Solenoid & Coupling CoilPage 43 Steve Virostek - Lawrence Berkeley National Laboratory Timeline – Early MuCool Coil Delivery

44 MICE: Spectrometer Solenoid & Coupling CoilPage 44 Steve Virostek - Lawrence Berkeley National Laboratory Proposed Fabrication Plan Summary LBNL to provide design concept & specification ICST to develop detailed coupling coil design –Engineering analyses and design drawings –Design review to be held prior to fabrication LBNL will supply some components and material –Superconductor, cryocoolers, power supplies, etc. ICST will fabricate and test the coupling coils LBNL will oversee the design and fabrication

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