Inverse bremsstrahlung in a plasma with electron temperature anisotropy
Inverse bremsstrahlung in a plasma with electron temperature anisotropy
复制标题
具有电子温度各向异性的等离子体中的逆轫致辐射
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
S. A. Uryupin
中科院分区：
文献类型：
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作者：
G. Ferrante;M. Zarcone;S. A. Uryupin
研究了具有各向异性双温双麦克斯韦电子分布函数的等离子体中电磁辐射的反韧致辐射吸收。在弱场的情况下，如果辐射场在等离子体电子具有两个温度中较小的一个的平面上极化，则吸收更有效。在分布函数高度各向异性的情况下，当场极化相对于温度各向异性轴改变其方向时，吸收发生强烈变化。在中间区域，当磁场方向与较大温度方向不是很接近时，吸收效率和各向异性程度都降低。建立了吸收功率实际上不依赖于场的条件。最后，在强场的情况下，吸收进一步减小，而各向异性程度是有效电子温度的弱变化对数函数。
Inverse bremsstrahlung absorption of electromagnetic radiation in plasma with anisotropic two-temperature bi-Maxwellian electron distribution function over velocities is investigated. In the case of a weak field, absorption is more effective if the radiation field is polarized in the plane in which the plasma electrons have the smaller of the two temperatures. In the case when the distribution function is highly anisotropic, absorption changes strongly when the field polarization changes its direction with respect to the temperature anisotropy axis. In the intermediate domain, when the field is strong in directions not very close to that of the larger temperature, both absorption efficiency and degree of its anisotropy decrease. The conditions when the absorbed power practically does not depend on the field are established. Finally, in the case of a strong field, absorption decreases further while the degree of anisotropy is a weakly changing logarithmic function of effective electron temperatures.