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This report discusses the optimization of Halbach arrays for the MICE (Muon Ionization Cooling Experiment) project, specifically focusing on permanent magnets (PMs). Initially, the coil's inner radius was reduced to 8.1mm while the PM's outer radius remained at 7.5mm, resulting in a calculated force of 75N. By adding axially magnetized blocks while keeping the overall length at 18mm, five blocks of varying lengths were arranged. The optimization yielded increased forces up to 107.2N. This analysis explores the impact of block configurations on overall performance.
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Halbach arrays for MICE PMs Ben Shepherd February 2012
Previously • Coil inner radius reduced to 8.1mm • PM outer radius kept at 7.5mm (i.e. 0.6mm gap) • Calculated force (from 2D model): 75N
Add axially-magnetised blocks • Keep overall length at 18mm • Five equal blocks, 3.6mm long • Force increased to 95N
Optimisation of block sizes • Overall length constant at 18mm • Block lengths: • a = 2.5mm • b = 4.0mm • c = 5.0mm • Force: 107.2N initial final a b c b a