High-Frequency Discharges: I Breakdown Mechanism and Similarity Relationship
High-Frequency Discharges: I Breakdown Mechanism and Similarity Relationship
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DOI：
10.1088/0370-1301/64/7/303
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发表时间：
1951-07
期刊：
影响因子：
--
通讯作者：
F. L. Jones;G. D. Morgan
中科院分区：
文献类型：
--
作者：
F. L. Jones;G. D. Morgan
研究了在空气和氢气中，在频率f为3.5 Mc/s的范围内，导线与同轴圆柱体之间的高频击穿。70 Mc/s压力低于20毫米汞柱。结果发现，几何相似的系统在相同的电位下崩溃，只要参数ap和f/p不变，a是线性尺寸。在这样的条件下，电子云的振荡的总振幅小于电极间隙，在电线的电场是控制因素，和击穿被发现是独立的圆柱体的表面的性质。因此，二次电离过程似乎没有发挥重要作用的情况下，静电放电。实验结果与以下观点一致：在空气和氢气中的高频放电是由气体中的初级电离和电子仅通过扩散损失到管壁所决定的，只要电子的平均自由程与放电管的线性尺寸相比是小的，并且碰撞频率比振荡频率大得多。简要讨论了相似关系的意义
High-frequency breakdown between wires and coaxial cylinders in air and in hydrogen was investigated over the range of frequencies f from 3.5 Mc/s. to 70 Mc/s. at pressures below 20 mm. Hg. It was found that geometrically similar systems broke down at the same potential provided that both parameters ap and f/p were invariant, a being a linear dimension. Under conditions such that the total amplitude of oscillation of the electron cloud was smaller than the electrode interspace, the electric field at the wire was the controlling factor, and breakdown was found to be independent of the nature of the surface of the cylinder. Consequently, secondary ionization processes did not appear to play an important part as in the case of static discharges. The experiments were in agreement with the view that the high-frequency discharge in air and in hydrogen is determined by primary ionization in the gas and loss of electrons to the walls by diffusion only, provided the electron mean free path is small compared with the linear dimension of the discharge tube, and the collision frequency is very much greater than the oscillation frequency. The significance of the similarity relation is briefly discussed