The Physics of Basis For A Conservative Physics And Conservative Technology Tokamak Power Plant, ARIES-ACT2
Authors: Charles E. Kessel and F.M. Poli
Abstract: The conservative physics and conservative technology tokamak power plant ARIESACT2
has a major radius of 9.75 m at aspect ratio of 4.0, strong shaping with elongation
of 2.2 and triangularity of 0.63. The no wall βN reaches ~ 2.4, limited by n=1 external
kink mode, and can be extended to 3.2 with a stabilizing shell behind the ring structure
shield. The bootstrap current fraction is 77% with a q95 of 8.0, requiring about ~ 4.0 MA
of external current drive. This current is supplied with 30 MW of ICRF/FW and 80 MW
of negative ion NB. Up to 1.0 MA can be driven with LH with no wall, and 1.5 or more
MA can be driven with a stabilizing shell. EC was examined and is most effective for
safety factor control over ρ ~ 0.2-0.6 with 20 MW. The pedestal density is ~ 0.65x1020
/m3 and the temperature is ~ 9.0 keV. The H98 factor is 1.25, n/nGr = 1.3, and the net
power to LH threshold power is 1.3-1.4 in the flattop. Due to the high toroidal field and
high central temperature the cyclotron radiation loss was found to be high depending on
the first wall reflectivity.
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Accepted for publication in: Fusion Science and Technology; AIRES-ACT special issue, January 2015
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