Ripple loss of alpha particles in a low-aspect ratio tokamak reactor

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

Studies on the loss of fusion produced alpha particles enhanced by toroidal field (TF) ripple in a low-aspect-ratio tokamak reactor (VECTOR) have been made by using an orbit-following Monte-Carlo code. In actual TF coil systems, the ripple loss of alpha particles is strongly reduced as the aspect ratio becomes low (the power loss is proportional to A $^{8.8}$ for A more than 2.5) and the reduction of the number of TF coils results in a large amount of ripple losses even in a low-aspect-ratio tokamak.

Language	:	Japanese
Journal	:	Denki Gakkai Rombunshi, A
Volume	:	129
Number	:	9
Pages	:	p.569 - 574
Publication Year/Month	:	2009/09
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Paper URL	:	https://doi.org/10.1541/ieejfms.129.569
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Keywords	:	no keyword
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Registration No. : AA20080742
JAEA Abstracts No. : 37001531
Paper Submission No. : 6535

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