Scattering of light in a strongly magnetized plasma
Scattering of light in a strongly magnetized plasma
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强磁化等离子体中的光散射
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
J. Ventura
中科院分区：
文献类型：
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作者：
J. Ventura
强磁化电子等离子体中的汤姆逊截面被重新研究，以期将Canuto，Lodenquai和Ruderman的先前结果扩展到冷等离子体极限之外。为此，在微分光子截面和入射光子在介质中引起的极化电流之间建立了形式关系。在冷等离子体的限制，我们正式的方法导致一个大大简化的微分截面，允许直观的理解的散射机制和所产生的各向异性。对于积分的部分和总（在最终极化上求和）横截面，我们恢复了以前的结果。这个理论的结构和附近的回旋共振检查，包括必要的耗散和加宽机制。超出冷等离子体限制的扩展进行了讨论的应用程序的吸积x射线天体的问题。在某些X射线双星的吸积柱的典型条件下，可以预期真空的双折射性质可能会显著改变光子截面和辐射的偏振性质。
The Thomson cross section in a strongly magnetized electron plasma is reexamined with a view to extending previous results of Canuto, Lodenquai, and Ruderman beyond the cold-plasma limit. To this end a formal relation is established between the differential photon cross section and the polarization currents induced in the medium by the incident photon. In the cold-plasma limit our formal approach leads to a substantially simplified differential cross section allowing an intuitive understanding of the scattering mechanism and the resulting anisotropy. For the integrated partial and total (summed over final polarizations) cross sections we recover previous results. The structure of this theory at and near the cyclotron resonance is examined including the necessary dissipative and broadening mechanisms. Extensions beyond the cold-plasma limit are discussed for the application to the problem of the accreting x-ray pulsars. Under conditions typical of the accretion column of some x-ray pulsars it is expected that the birefringent properties of the vacuum may significantly alter both the photon cross sections and the polarization properties of the radiation.