Features of quasi-gasdynamic plasma confinement in ECR ion source with powerful microwave pumping

Proceedings International University Conference 'Electronics and Radiophysics of Ultra-High Frequencies' (Cat. No.99EX356) Pub Date : 1999-05-24 DOI:10.1109/UHF.1999.787985

S. Golubev, S. Razin, V. E. Semenov, A. N. Smirnov, A. Vodopyanov, V. Zorin

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Abstract

Powerful ECR heating of a mirror-trapped plasma leads to formation of an anisotropic electron velocity distribution function (EDF): the average energy of the transverse, with respect to the magnetic field, electron motion is much greater than the energy of longitudinal motion. Theoretical studies of a mirror magnetic confinement of a multicomponent plasma with anisotropic EDF in a simple mirror trap reveals an essential augmentation in multicharged ion confinement time due to the EDF anisotropy. Consequently, the EDF anisotropy improves the ion charge state distribution (CSD). In this paper we discuss results of experimental investigation of an ECR discharge sustained by powerful pulse microwave radiation of a gyrotron in a mirror magnetic trap. In particular, data on plasma X-ray emission spectrum and on ion CSD are presented. Formation of the ion CSD has been explored both experimentally and numerically.

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强微波抽运ECR离子源准气动力等离子体约束特性

镜面捕获等离子体的强大ECR加热导致形成各向异性电子速度分布函数(EDF):相对于磁场，电子横向运动的平均能量远大于纵向运动的能量。对具有各向异性EDF的多组分等离子体在简单镜像阱中的镜像磁约束的理论研究表明，由于EDF的各向异性，多电荷离子的约束时间有本质的延长。因此，EDF各向异性改善了离子荷态分布(CSD)。本文讨论了反射磁阱中回旋管强脉冲微波持续ECR放电的实验研究结果。特别给出了等离子体x射线发射光谱和离子CSD的数据。对离子CSD的形成进行了实验和数值研究。

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Proceedings International University Conference 'Electronics and Radiophysics of Ultra-High Frequencies' (Cat. No.99EX356)

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