The effect of the induced longitudinal (along the toroidal magnetic field) electric field on the shape of soft X-ray spectra in the regime of electron cyclotron resonance (ECR) heating of plasma in the L-2M stellarator is considered. Causes of the appearance of non-Maxwellian two-slope spectra of soft X-rays measured in the axial ECR plasma heating regimes at the introduced microwave powers of 200–400 kW are analyzed. In the authors' opinion, the two-temperature spectral shape arises due to the fact that radiation coming from two plasma regions falls in the field of view of the spectrometer when measuring the spectra along the central chord. A radiation fraction comes from the axial plasma region; another fraction comes from the heating region which in the high-power ECRH regime is approximately at half the plasma radius, rather than at the plasma center.

考虑了在L-2M恒星发生器中等离子体的电子回旋共振（ECR）加热方式下，感应的纵向（沿环形磁场）电场对软X射线光谱形状的影响。分析了在引入的200–400 kW微波功率下，在轴向ECR等离子体加热方式下测得的软X射线非麦克斯韦二坡度光谱出现的原因。在作者看来，两温光谱形状的出现是由于以下事实：当沿中心弦测量光谱时，来自两个等离子体区域的辐射落在光谱仪的视野中。辐射分数来自轴向等离子体区域。另一部分来自加热区域，在高功率ECRH方案中，该区域大约是等离子体半径的一半，