First physics results from the MAST Mega-Amp Spherical Tokamak
First physics results from the MAST Mega-Amp Spherical Tokamak
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MAST 巨型放大器球形托卡马克的第一个物理结果
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Mast Team
中科院分区：
文献类型：
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作者：
A. Sykes;J. Ahn;R. Akers;E. Arends;P. Carolan;G. Counsell;S. Fielding;M. Gryaznevich;R. Martín;M. Price;C. Roach;V. Shevchenko;M. Tournianski;M. Valovic;M. Walsh;H. Wilson;Mast Team
本文介绍了MAST（Mega-BasterSpherical Tokamak）的第一个物理结果，MAST是新一代专用球形托卡马克（STs）之一，现已开始运行。这些结果中的一些首次证明了低纵横比的新效应，例如，由于新古典效应而导致的电阻率的增强。实现了H-模式，并且向H-模式的转变伴随着边缘密度梯度的十倍陡化，这可能使电子伯恩斯坦波加热在ST中的成功应用成为可能。晕流的研究表明，这些结果低于传统托克马克结果的预期，偏滤器功率负载的测量证实，大部分功率流向外部撞击点，从而减轻了内部点的功率处理（对于ST来说是一个关键问题）。
First physics results are presented from MAST (Mega-Amp Spherical Tokamak), one of the new generation of purpose built spherical tokamaks (STs) now commencing operation. Some of these results demonstrate, for the first time, the novel effects of low aspect ratio, for example, the enhancement of resistivity due to neo-classical effects. H-mode is achieved and the transition to H-mode is accompanied by a tenfold steepening of the edge density gradient which may enable the successful application of electron Bernstein wave heating in STs. Studies of halo currents show that these less than expected from conventional tokamak results, and measurements of divertor power loading confirm that most of the power flows to the outer strike points, easing the power handling on the inner points (a critical issue for STs).