Study of the expansion of a plasma generated by electron-beam evaporation
Study of the expansion of a plasma generated by electron-beam evaporation
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电子束蒸发产生等离子体的膨胀研究
DOI：
10.1063/1.368625
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发表时间：
1998
影响因子：
3.2
通讯作者：
J. Nicolaï
中科院分区：
文献类型：
--
作者：
E. Bésuelle;J. Nicolaï
本文研究了在电子束蒸发器中产生的电离铀蒸汽的稳定膨胀。利用静电探针，沿垂直轴测量了蒸发器内的电子温度、电子密度和等离子体电位。通过沿垂直轴移动探针进行的分析，首先表明等离子体在真空室中膨胀时被热化，其次，等离子体密度呈指数下降。用考虑电荷交换过程的流体模型对等离子体膨胀进行了理论描述。在求解由三个方程（连续性、动量守恒和能量守恒）组成的系统时，得到了与实验数据吻合较好的结果。
The stationary expansion of an ionized uranium vapor, created in an electron-beam evaporator, is studied in this article. Using an electrostatic probe, the electron temperature, the electron density, and the plasma potential have been measured along the vertical axis in the evaporator. The analysis, made by moving the probe along the vertical axis, first shows that the plasma is thermalized during its expansion in the vacuum chamber and, second, that the plasma density decreases exponentially. The plasma expansion is theoretically described using a fluid model which takes into account the charge exchange process. In solving the system, consisting of three equations (continuity, momentum conservation, and energy conservation), good agreement with the experimental data is obtained.