The Magnesium Oxide Cold Cathode and Its Application in Vacuum Tubes
The Magnesium Oxide Cold Cathode and Its Application in Vacuum Tubes
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DOI：
10.1109/jrproc.1959.287076
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发表时间：
1959-10
期刊：
影响因子：
--
通讯作者：
A. Skellett;B. Firth;D. Mayer
中科院分区：
文献类型：
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作者：
A. Skellett;B. Firth;D. Mayer
MgO冷阴极是一种新型的电子源，在各种类型的电子管中具有潜在的应用前景。它由镍基上的多孔氧化镁薄层组成。据信，在操作时存在于整个层上的强电场产生了从表面的电子发射。有证据支持雪崩倍增发生在该层的理论。该阴极在操作期间发出淡蓝色的发光。发射电子的速度分布在13电子伏处显示出峰值。外表面电位已被测量，并发现是150伏的数量级相对于镍基地。该发射器不能自启动，并对启动方法进行了讨论。噪声，寿命，排放密度和温度范围内的操作进行了讨论，只要目前的知识允许。本文叙述了采用这种阴极的放大管的实验设计，并给出了这种管的特性。
The MgO cold cathode is a new source of electrons with possible applications in various types of electron tubes. It consists of a thin layer of porous magnesium oxide on a nickel base. A strong electric field that exists across the layer while in operation is believed to produce the electron emission from the surface. Evidence supports the theory that avalanche multiplication occurs in the layer. This cathode glows with a pale blue luminescence during operation. The velocity distribution of the emitted electrons shows a peak at 13 electron volts. The outer surface potential has been measured and found to be of the order of 150 volts with respect to the nickel base. The emission is not self-starting, and starting means are discussed. Noise, life, emission density, and temperature range of operation are discussed in so far as present knowledge permits. An experimental design of an amplifier tube employing this cathode is described and the characteristics of the tube are given.