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Spectrometer Solenoid Design and Procurement Review Steve Virostek Mike Green Mike Zisman Lawrence Berkeley National Lab MICE Collaboration Meeting October 10, 2006
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Spectrometer Solenoid Design & ProcurementPage 2 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Design review held by Wang NMR on Sept 6, 2006 - Attendees: S. Virostek, M. Zisman, M. Green, D. Li - Complete design package book provided by Wang - Issues and actions items identified during review - Follow up document from Wang addresses issues Detailed magnet design is now complete Superconducting wire sent from LBNL to Wang Coil formers and high T C leads ordered by Wang First magnet scheduled to be shipped end Aug 07 Spectrometer Solenoid Update
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Spectrometer Solenoid Design & ProcurementPage 3 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab He Filler Neck Lead Neck Cold Mass Support PMT Iron Shield Space for Radiation Shield Support Stand Cooler Neck
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Spectrometer Solenoid Design & ProcurementPage 4 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Lead Neck Gas Pipe 4.2 K Coolers Condenser Tank Liquid Pipe Cold Mass 4K End 60K Intercept 300K End
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Spectrometer Solenoid Design & ProcurementPage 5 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Magnet Coil Parameters Uniform Field Magnets * The uniform field magnet coils in series have a self inductance of 77 H Separately Powered Coil package length = 2530 mm -
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Spectrometer Solenoid Design & ProcurementPage 6 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Magnet Coil Load Lines
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Spectrometer Solenoid Design & ProcurementPage 7 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Indirect cooling using liquid helium condensers Baseline design will use two cryocoolers but will allow mounting of a third cooler, if necessary Cryocoolers and high T C leads will be accessible by means of removable cover plates 60K (or less) thermal shield is conductively cooled using the first stage of the cryocoolers Thermal shield nitrogen reservoir will protect the high T C leads and provide extra cooling margin Design Overview (coil cooling)
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Spectrometer Solenoid Design & ProcurementPage 8 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab 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)
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Spectrometer Solenoid Design & ProcurementPage 9 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab 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 TBD: lifting accommodations and base mounting Design Overview (PV’s & supports)
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Spectrometer Solenoid Design & ProcurementPage 10 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Two cryocoolers are needed at Wang NMR by the end of Feb 2007 for installation into first magnet Two additional coolers needed one month later 13 week lead time after placement of order Two coolers per magnet anticipated for operation Magnets designed to mount up to three coolers Two more coolers to be procured at a later date Short procurement spec to be done by M. Green Cryocooler Procurement
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Spectrometer Solenoid Design & ProcurementPage 11 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab First draft of power supply procurement spec is being reviewed by collaboration members Three 300 A and two 50 A supplies are needed for magnet operation and for testing @ FNAL One spare of each supply allows parallel testing of first (@FNAL) & second (@Wang) magnets Lead time to procure power supplies is 3 months First supply needed May 07 for testing at Wang Power Supply Procurement
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Spectrometer Solenoid Design & ProcurementPage 12 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab On-axis field profile and peak field on conductor Axial forces and axial magnetic pressure calcs Evaluation of fringe fields on leads & cryocoolers 3-D magnet quench analyses (w/o Al bore tube) Heat leak calculations (thermal shield, He vessel) Calculation of cooldown cryogen requirements FEA stress analysis of coils and coil former ASME code calculations for He & vacuum vessels Summary of Wang Analyses
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Spectrometer Solenoid Design & ProcurementPage 13 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Magnet Construction Quality Assurance Plan Fabrication/installation/inspection plans: - coil former, ground insulation, coil winding, coil banding - quench protection, conductor feed thrus, coil assembly - He vessel, cold mass support, He recondenser, Hi-T C leads - thermal shield, vacuum vessel, support structure Winding instructions for each coil Project work breakdown structure and schedule Detailed component and assembly drawings Other Project Documents
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Spectrometer Solenoid Design & ProcurementPage 14 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Schedule Summary
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Spectrometer Solenoid Design & ProcurementPage 15 S. Virostek, M. Green, M. Zisman - Lawrence Berkeley Lab Detailed magnet design is now complete Coil formers and high T C leads ordered Superconducting wire delivered to Wang Cryocooler order to be placed soon (~1 mo) Power supply spec is nearly complete First magnet to be shipped by end Aug 07 Second magnet to follow 1 month later Summary
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