Effects of Nonequilibrium Free Electrons on Atomic Processes

Takashi Yabe; Takayasu Mochizuki; Takayuki Aoki; Takashi Fujimoto

doi:10.1143/JPSJ.59.3439

Effects of Nonequilibrium Free Electrons on Atomic Processes

Takashi Yabe, Takayasu Mochizuki, Takayuki Aoki, Takashi Fujimoto

Research output: Contribution to journal › Article › peer-review

Abstract

Radiative and collisional atomic processes are proven to be affected critically by the shape of the free electron distribution. For a bi-Maxwellian distribution with temperatures T_x and T_⊥ for the motions in the x and the perpendicular directions, the radiative recombination rate is enhanced by a factor of ten for T_⊥/T_x=0.1 and becomes infinite in the limit of T_⊥/T_x=0. This enhancement can largely increase the gain in recombination X-ray lasers. With the aid of applied magnetic fields, this temperature anisotropy can easily be created. Possible applications to laser-produced plasmas and magnetically confined plasmas such as in tandem mirror devices are discussed.

Original language	English
Pages (from-to)	3439-3442
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	59
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.59.3439
State	Published - 1990
Externally published	Yes

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author = "Takashi Yabe and Takayasu Mochizuki and Takayuki Aoki and Takashi Fujimoto",

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AU - Mochizuki, Takayasu

AU - Aoki, Takayuki

AU - Fujimoto, Takashi

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AB - Radiative and collisional atomic processes are proven to be affected critically by the shape of the free electron distribution. For a bi-Maxwellian distribution with temperatures Tx and T⊥ for the motions in the x and the perpendicular directions, the radiative recombination rate is enhanced by a factor of ten for T⊥/Tx=0.1 and becomes infinite in the limit of T⊥/Tx=0. This enhancement can largely increase the gain in recombination X-ray lasers. With the aid of applied magnetic fields, this temperature anisotropy can easily be created. Possible applications to laser-produced plasmas and magnetically confined plasmas such as in tandem mirror devices are discussed.

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Effects of Nonequilibrium Free Electrons on Atomic Processes

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