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. 2023 Jan 25;20(1):016028. doi: 10.1088/1741-2552/acae0d

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© 2023 The Author(s). Published by IOP Publishing Ltd

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Figure 6. — Computational model of the TMS rat coil. (a) The long square-bar magnetic core of M3 silicon steel. (b) Skewed inner helical spiral with the radius of 9 mm and a variable pitch. (c) Similar outer spiral with the radius of 16 mm. (d) A complete 20+20+6 coil assembly (the 20+20 assembly looks similar). Litz wires have been numerically ‘twisted’ as shown in figure 2.