La–Mo emitters in hollow cathodes
La–Mo emitters in hollow cathodes
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DOI：
10.1063/1.1136126
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发表时间：
1980-11
影响因子：
1.6
通讯作者：
D. Goebel;A. Forrester;S. Johnston
中科院分区：
文献类型：
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作者：
D. Goebel;A. Forrester;S. Johnston
一个空心阴极，它利用镧钼（LM）作为活性电子发射体的描述和比较性能相同的配置中的相等面积的LaB 6发射器。在氩气和氢气中进行的测试在连续和长脉冲操作中从LM材料产生高达10 A/cm 2的有效发射电流密度。运行40小时后的检查显示没有损坏或快速蒸发的迹象。在50小时后停止LaB 6发射的发射表面上的杂质积聚对于LM是不明显的，并且对于使用该发射体的阴极预期寿命长。
A hollow cathode which utilizes lanthanum molybdenum (LM) as the active electron emitter is described and compared in performance to a LaB6 emitter of equal area in an identical configuration. Tests in both argon and hydrogen produced effective emission current densities of up to 10 A/cm2 from the LM material in continuous and long pulse operation. Examination after 40 h running time showed no sign of damage or rapid evaporation. Impurity build up on the emitting surfaces which stopped the LaB6 emission after 50 h was not apparent with the LM and long lifetimes are anticipated for cathodes using this emitter.