Authors: C. E. Kessel

Abstract:

The FNSF core plasma physics is examined with detailed analysis to establish the basis for the reference configuration, R = 4.8 m, a= 1.2 m, Ip = 7.87 MA, and B1 = 7.5 T, q95 = 6, f8 s = 0.52,  N  < 2.7 established in ref [1]. Plasma equilibrium analysis is used to provide the CS/PF coil solution, and time-dependent free-boundary plasma evolution simulations are used to examined the integrated behavior into the relaxed plasma state.Ideal MHD stability is used to establish the pedestal height with EPED, and n=l stability is assessed with PESTl. Heating and current drive are examined for negative ion neutral beams , lower hybrid, ion cyclotron and electron cyclotron systems.   A combination of 50 MW NB, 30 MW LH, 20 MW ICRF and 20 MW EC is the reference. The energy confinement requirements are found to be modest to provide 100% non-inductive current, with H9s - 1.1-1.2, however, GLF23 predictions lead to H9s values - 0.65-0.8 in the absence of a and rotational stabilization. The impacts on the FNSF include the holes in the FW for the H/CD, the presence of tungsten conductors in the blanket during disruptions, and finding solutions for the CS magnet.

Submitted to: Fusion Engineering and Design
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Download PPPL-5350 1.8 MB (29 pp)
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