Confinement of alpha particles in a low aspect ratio tokamak reactor

Tani, Keiji; Tobita, Kenji; Nishio, Satoshi; Iio, Shunji*; Tsutsui, Hiroaki*; Aoki, Takayuki*

Studies were made on ripple losses of fusion produced alpha particles in a low-aspect-ratio tokamak reactor (VECTOR) by using an orbit-following Monte-Carlo code. Alpha particles are well confined in VECTOR. In a low-aspect-ratio tokamak, the dependence of ripple losses on the number of toroidal-field (TF) coils N is very weak. Assuming a toroidal peaking factor of 2 for the heat load due to loss particles, about 1.5% and 1.0% of TF ripple at the outer edge of plasma might be allowable for the first wall with and without cooling system, respectively. In both cases, the number of TF-coils can be reduced to about 4.

Language	:	Japanese
Journal	:	Purazuma, Kaku Yugo Gakkai-Shi
Volume	:	80
Number	:	11
Pages	:	p.931 - 934
Publication Year/Month	:	2004/11
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Paper URL	:	https://doi.org/10.1585/jspf.80.931
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Keywords	:	Low Aspect Ratio; Tokamak; Fusion Reactor; Alpha Particle; Ripple Loss; Toroidal Coil
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Registration No. : A20040484
JAEA Abstracts No. : 330221
Paper Submission No. : 21623

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