MHD stability of single null negative triangularity tokamak and the flux tube expansion divertor

Kikuchi, Mitsuru; Medvedev, S.*; Takizuka, Tomonori*; Nagasaki, Kazunobu*; Cheng, D.*

We are proposing negative triangularity tokamak (NTT) for drastic improvement of power handling capability of tokamak fusion reactor. This configuration is magnetic hill but we found it is stable up to a normalized beta 3.2 with appropriate profile control to increase magnetic shear near periphery. MHD stability of single null divertor also shows a normalized beta 3 can be stable. This leads to a possible implementation of flux tube expansion (FTE) divertor proposed by Takizuka and may get 2.7 flux expansion.

Language	:	Japanese
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Meeting title	:	日本物理学会第71回年次大会
Held date	:	2016/03
Location (city)	:	仙台
Location (country)	:	日本
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Keywords	:	トカマク; 負三角度; ダイバータ
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Registration No. : BB20152799
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