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Magnetic Field and Magnetic Shielding R&D

Magnetic Field and Magnetic Shielding R&D. The next 15 months. Goals Develop coil structures from non-conducting materials. Test active B-field shielding for dressing coils with 1/7 scale prototype

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Magnetic Field and Magnetic Shielding R&D

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  1. Magnetic Field and Magnetic Shielding R&D The next 15 months • Goals • Develop coil structures from non-conducting materials. • Test active B-field shielding for dressing coils with 1/7 scale prototype • Test superconducting shield in 1/7 scale prototype (@ 4K including B0 coil and ferromagnetic shield) • Construct ½ scale B0 coil and demonstrate scaled uniformity and gradient specs • Upgrade Tosca for eddy-current calculations • Construct test dewar for 4K vertical and horizontal measurements for ½ scale B0, and 3He holding coils • Build high-field holding coil for injection tests B. Filippone 10/7/06

  2. New Coil Structures • Jan B. has been working on composite structures for coil fabrication • Use these to construct ½ scale B0coil and ferromagnetic shield part of previous R&D – 17k$ submitted 4/11/06 – “approved” 9/25/06 • Measure coil field uniformity shoot for

  3. Active shielding for Dressing Coil • Construct dual active shielding @ 1/7 scale • New capital • Fabricate coil • Additional fluxgate magnetometer • Additional power supply and readout

  4. Superconducting Shield • 1/7 scale prototype SC shield to be used with existing cosq coil and ferromag. Shield • Initial tests with fluxgate magnetometer • Test with SQUIDs if possible (Collaborate with LANL or purchase ~ 12 k$ • Requires upgrade to existing dewar, temp. readout, LHe

  5. Cosq coil for 3He R&D project • Construct 1 m long, 30 cm diameter coil • 20 gauss max. field • Average gradients < 5 mg/cm • Requires • Support structure • SC wire • Vaper-cooled power leads • Power supply Dima’s Idea Try 1kG magnet Gives much larger NMR signal

  6. Other Items • TOSCA upgrade for ASU (Electra and extra license) • Magnetic Mapper upgrade

  7. Cost Summary • 20 gauss R&D coil (hi –B??): 26k$ • SC shield prototype: 20k$ • Active shield prototype: 18k$ • TOSCA upgrade: 8k$ • ½ scale test Dewar: 30k$ • Mag. Mapper upgrade: 3k$ 105k$ Try to beg/borrow or steal HTS or LTS SQUIDS Buy ~ 15k$ Above includes ~ 20k$ machinist, 85k$ equipment

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