在极低气体压力下通过正电离子电放中和电子空间电荷的方法.pdf

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4o8 E. II. XINGDON.

A METHOD FOR THE NEUTRALIZATION OF ELECTRON SPACE CHARGE BY POSITIVE IONIZATION AT VERY LO% GAS PRESSURES. 8Y K. H. KINGDON. ABSTRACT. Neutralization of space charge around a hot filament by imprisoned positive — ions in gas at very low pressures. (z) Design of tlute. If a very small fila- ment, diameter o.oI cm, is run axially through a cylindrical anode v, ith closed ends, positive ions formed between the electrodes can only rarely escape and will describe orbits around the filament until they lose sufficient energy by colli- sion with gas molecules to enable them to fall into the cathode. The im- prisoned ions, during their lives, neutralize a certain amount of the space charge between the electrodes. The efl-ect should increase with the absolute temperature and with

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