Formation and sustainment of a 150 kA tokamak by coaxial helicity injection.
Formation and sustainment of a 150 kA tokamak by coaxial helicity injection.
复制标题
通过同轴螺旋注入形成和维持 150 kA 托卡马克。
DOI：
10.1103/physrevlett.72.3666
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发表时间：
1994
影响因子：
8.6
通讯作者：
Zhou
中科院分区：
文献类型：
--
作者：
Nelson;Jarboe;Orvis;McCullough;Xie;Zhang;Zhou
同轴螺旋注入用于生产低宽高比托卡马克，其环形电流达到150 kA（螺旋注入电流驱动所达到的最高值），并且在没有电流驱动变压器的情况下，在许多电阻扩散时间内持续超过100 kA。假设无异常螺旋度耗散，电流驱动功率效率为欧姆的40%。这些托卡马克具有旋转的n= 1环面畸变，仅在外部坏曲率区域具有极向畸变。平衡重建表明，这些等离子体具有高达112 kA的闭场环面电流，宽高比A= 1.69，托卡马克q分布和空心环面电流分布。
Coaxial helicity injection is used to produce low-aspect-ratio tokamaks with toroidal currents reaching 150 kA (highest value yet attained by helicity injection current drive) and sustained over 100 kA for many resistive diffusion times, without a current drive transformer. Current drive power efficiency, assuming no anomalous helicity dissipation, is 40% that of Ohmic. These tokamaks have a rotating n= 1 toroidal distortion, with poloidal distortions only on the outer bad-curvature region. Equilibrium reconstruction suggests these plasmas have up to 112 kA of closed-field toroidal current, an aspect ratio A= 1.69, a tokamak q profile, and a hollow toroidal current profile.