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HT-7上用于低杂波电流驱动的相控波导阵天线采用的是标准波导,长和宽都是有限值。在考虑了天线上下排波导之间可能存在的极向相位差以及电磁干扰时,通过数值模拟的方法,分别得到了低杂波在环向方向的平行功率谱和在极向方向的极向功率谱。由于极向波矢的存在,低杂波进入等离子体的入射方向会发生改变。最后在不同极向相位差下对低杂波进入等离子体的入射方向进行了简要的计算和讨论。 相似文献
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The coupling of lower hybrid wave to the plasma is a
crucial issue for efficient current drive in tokamaks. This paper
establishes a new coupling model which assumes the antenna to be a
curved face and the plasma to be a cylinder. Power spectrum considering
the coupling between wave-guides in both poloidal and toroidal
direction is simply estimated and discussed. The effect of the poloidal wave
vector on wave propagation, power deposition and driven current is
also investigated with the help of lower hybrid current drive code.
Results show that the poloidal wave vector affects the ray tracing,
and also has effect on power deposition and driven current. The
effect of the poloidal wave vector on power deposition and driven
current profile depends on plasma parameters. Preliminary studies
suggest that it seems possible to control the current profile by
adjusting the poloidal phase difference between the waveguide in
poloidal direction. 相似文献
3.
采用STEP+RAMP的模型模拟低杂波与等离子体耦合。在该模型中,等离子体边界密度一开始就处于一个比较高的值(大于截 相似文献
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