Slablike ion temperature gradient driven mode in reversed shear tokamaks

Idomura, Yasuhiro ; Tokuda, Shinji; Kishimoto, Yasuaki

The ion temperature gradient driven (ITG) mode in reversed shear tokamaks is analyzed using a gyrokinetic toroidal particle code. It is found that the ITG mode in the reversed shear configuration shows a coupled mode structure between the slab and toroidal ITG modes. Especially in the $q_{min}$ region, a slab like feature due to the reversed shear slab ITG mode becomes strong. This coupled eigenmode structure is changed from a slab mode to a toroidal mode depending on $eta_i=L_n/L_{ti}$ and $L_{ti}$ . Results show that in reversed shear tokamaks, the ITG mode is determined from a competition between the slab and toroidal ITG modes.

Language	:	English
Journal	:	New Journal of Physics (Internet)
Volume	:	4
Number	:	1
Pages	:	p.101.1 - 101.13
Publication Year/Month	:	2002/12
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Keywords	:	ジャイロ運動論; 粒子コード; 反転磁気シアトカマク; イオン温度勾配駆動モード; スラブITGモード; トロイダルITGモード
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Registration No. : A20020528
JAEA Abstracts No. : 310661
Paper Submission No. : 20175

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