1. It has 16 toroidal field coils and 12 poloidal field coils. 2. FRCs have been formed through the merging of spheromaks of opposite and canceling toroidal field . 3. In fact, in an RFP the externally applied toroidal field is switched off shortly after startup. 4. The "'tachocline "'is the transition region of the Sun between the toroidal field . 5. However spherical tokamaks to date have been at low toroidal field and as such are impractical for fusion neutron devices. 6. The 18 Toroidal Field coils at max field of 11.8 T will store 41 GJ ( total ? ). 7. The maximum field strength is 1.2 tesla produced by 20 toroidal field coils spaced symmetrically in the toroidal direction. 8. In a classical conductor the toroidal field in a steady state would reach, by diffusion, a uniform radial distribution. 9. This means that there is no externally driven current on the device axis and so there are no external toroidal field coils. 10. In a tokamak the toroidal field is much stronger than the poloidal field, but in an RFP it's just the opposite.
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