Transparency of Magnetized Plasma at Cyclotron Frequency

Details Transparency of Magnetized Plasma at Cyclotron Frequency Transparency of Magnetized Plasma at Cyclotron Frequency

2002-02-20

arxiv.org/abs/physics/0202051v1

Physics

Plasma Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.89.115003

Electromagnetic radiation is strongly absorbed by the magnetized plasma if its frequency equals the cyclotron frequency of plasma electrons. It is demonstrated that absorption can be completely canceled in the presence of a second radiation beam, or even a magnetostatic field of an undulator, resulting in plasma transparency at the cyclotron frequency. This effect is reminiscent of the electromagnetically-induced transparency (EIT) of the three-level atomic systems, except that it occurs in a completely {\it classical} plasma. Also, because of the complexity of the classical plasma, index of refraction at cyclotron frequency differs from unity. Potential applications of the EIT in plasma include selective plasma heating, electromagnetic control of the index of refraction, and electron/ion acceleration.

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