Slow-wave launching at the lower hybrid frequency using a phased waveguide array
Slow-wave launching at the lower hybrid frequency using a phased waveguide array
复制标题
DOI：
10.1088/0029-5515/16/1/005
复制
发表时间：
1976-02
期刊：
影响因子：
3.3
通讯作者：
M. Brambilla
中科院分区：
文献类型：
--
作者：
M. Brambilla
研究了一种相控多波导结构(“格栅”)在满足可及条件的情况下，以低杂波频率发射高频波来加热大尺寸环形等离子体的耦合效率。为了求出激发场的反射系数、透射率以及k‖谱，波导场被表示为本征模的叠加，它与等离子体中的场相匹配，这是基于等离子体边缘附近的线性密度分布的假设。结果表明，反射系数可以被调到可以接受的低值，并且不敏感地依赖于等离子体参数。得出的结论是，设计一种能够以反应堆等离子体点火所需的功率水平发射较低杂波的格栅是可能的。
The coupling efficiency of a phased multi-waveguide structure (the “Grill”) designed to launch HF-waves at the lower hybrid resonance to heat large toroidal plasmas, while satisfying the accessibility condition, is studied. To find the reflection and transmission coefficients, as well as the k‖-spectrum of the excited field, the waveguide field, represented as a superposition of eigenmodes, is matched to the field in the plasma, which is evaluated on the assumption of a linear density profile near the plasma edge. It is found that the reflection coefficient can be made acceptably low and is not sensitively dependent on the plasma parameters. It is concluded that it is possible to design a Grill capable to launch lower hybrid waves at the power level required for the ignition of a reactor plasma.