Bootstrap current fraction scaling for a tokamak reactor design study

被引：5

作者：

Gi, Keii ^{[1
]}

Nakamura, Makoto ^{[2
]}

Tobita, Kenji ^{[2
]}

Ono, Yasushi ^{[1
]}

机构：

[1] Univ Tokyo, Bunkyo Ku, Tokyo 1130032, Japan

[2] Japan Atom Energy Agcy, Aomori 0393212, Japan

来源：

FUSION ENGINEERING AND DESIGN | 2014年 / 89卷 / 11期

关键词：

Bootstrap current fraction; Systems codes; Reactor design; Tokamak; Spherical tokamak; Scaling;

D O I：

10.1016/j.fusengdes.2014.07.009

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

We have derived new bootstrap current fraction scalings for systems codes by solving the Hirshman-Sigmar model, which is valid for arbitrary aspect ratios and collision conditions. The bootstrap current density calculation module in the ACCOME code was used with the matrix inversion method without the large aspect ratio assumption. Nine self-consistent MHD equilibria, which cover conventional, advanced and spherical tokamaks with normal or reversed shear, were constructed using numerical calculations in order to compare the bootstrap current fraction values with those of the new model and all six existing models. The Wilson formula successfully predicted the bootstrap current fraction, but it requires current density profile index for the calculation. The new scaling formulas and IPDG accurately estimated the bootstrap current fraction for the normal and weakly reversed shear tokamaks, regardless of the aspect ratio. However, none of the existing models except the Wilson formula can accurately estimate the bootstrap current fraction for the reversed shear tokamaks, which is promising for the advanced tokamak operation mode. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：2709 / 2715

页数：7

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