Abstract

Modeling of the pulse-periodic high-pressure cesium discharge on the basis of the radiative gas dynamic equations is executed. Calculation results of radial profiles of the plasma temperature, energy losses on radiation, electron densities and radial velocity of motion are given to various instants from the beginning of a current pulse. It is shown that the discharge under study makes it possible to create almost completely ionized plasma in the hot near-axis area. In this area, electron density increases from the axis to the wall of the tube and the radial profile of concentration has a shape close to parabolic. The time of existence of a plasma waveguide is equal to tens of microseconds, its radius is about a millimeter and the electron density on its axis is about 10¹⁷–10¹⁸ cm^–3. Also, mechanisms of a plasma waveguide formation in the discharge are discussed in the paper.

中文翻译：

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基于脉冲周期高压铯放电的等离子波导建模

摘要

基于辐射气体动力学方程，对脉冲周期高压铯放电进行建模。从电流脉冲开始到各个瞬间，都会给出等离子温度，辐射能量损失，电子密度和径向运动速度的径向分布图的计算结果。结果表明，所研究的放电可以在热的近轴区域产生几乎完全电离的等离子体。在这个区域中，电子密度从轴到管壁增加，并且浓度的径向分布具有接近抛物线的形状。等离子体波导的存在时间等于数十微秒，其半径约为1毫米，其轴上的电子密度约为10 ¹⁷ –10 ¹⁸  cm^–3。此外，本文还讨论了放电中等离子体波导形成的机理。