Abstract

The shape of soft X-ray spectra and energy confinement dynamics is studied in experiments on central ECR heating with a power to 1 MW using the L-2M stellarator. It is shown that the spectra remain two-temperature with increasing heating power. In this case, the average electron energy in the epithermal spectral region increases reaching 25% of the average energy over the entire spectrum at an ECR heating power of 950 kW. It is shown that the plasma confinement energy in the L-2M stellarator gradually decreases at heating powers above 700 kW, which is associated with an increase in the plasma radiative loss power, caused by impurity accumulation.

中文翻译：

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L-2M恒星机在1 MW加热功率下ECR等离子体加热实验中的能量限制动力学和软X射线光谱

摘要

使用L-2M恒星发生器在功率为1 MW的中央ECR加热实验中研究了软X射线光谱的形状和能量约束动力学。结果表明，随着加热功率的增加，光谱保持在两个温度。在这种情况下，在950 kW的ECR加热功率下，超热光谱区域的平均电子能量增加到整个光谱平均能量的25％。结果表明，L-2M恒星发生器中的等离子体约束能量在700 kW以上的加热功率下逐渐降低，这与杂质积累引起的等离子体辐射损耗功率的增加有关。