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本文描述了用静电探针测量探针悬浮电位的方法,给出MM-4中电位分布的实验结果。结果表明轴向电位分布不对称,径向分布对称;在等离子体中沿轴向和径向存在双离子位阱;最深位阱深度随注入电流和磁场增加而加深;最深位阱的位置随注入能量的增加渐渐向系统中心移动。此结果不同于其它国家同类装置的结果,文中对这些结果做了详细分析和讨论,对产生的机制和结果的重要意义进行了探讨。本文还给出了五种不同方法同时标定等离子体电位的初步结果。
This paper describes a method for measuring the probe floating potential with an electrostatic probe and gives the experimental result of the potential distribution in MM-4. The results show that the axial potential distribution is asymmetric and the radial distribution is symmetrical. The double ion trap exists in the axial and radial directions in the plasma. The depth of the deepest well deepens with the increase of the injection current and magnetic field. The increase in energy gradually moves toward the center of the system. This result is different from the results of similar devices in other countries. The results are analyzed and discussed in detail in this paper, and the significance of the mechanism and result is discussed. This paper also gives the preliminary results of five different methods for simultaneous calibration of plasma potentials.