Thermionic emission of impregnated dispenser cathodes at low temperature
Thermionic emission of impregnated dispenser cathodes at low temperature
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DOI：
10.1109/ivec.2013.6571066
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
Q. Zheng;Shengyi Yin;Z. Peng;Yu Wang;Xinxin Wang;Yang Li
中科院分区：
文献类型：
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作者：
Q. Zheng;Shengyi Yin;Z. Peng;Yu Wang;Xinxin Wang;Yang Li
采用脉冲激光沉积技术，将活性物质BaO/SrO/Sc_2O_3浸渍在W+BaO/SrO/Sc_2O_3混合涂层上，制备了一种新型的浸渍式阴极，证明了该阴极具有良好的上级发射性能。然而，这种浸渍的分配式阴极在低温下的电子发射并不清楚。我们的研究结果表明，这种新的浸渍分配式阴极的电流-电压特性保持不饱和行为。在0 ~ 3000 V电压范围内，电流密度在650°C时达到最大值2.1 Acm ~（-2）。这些结果为进一步研究阴极的发射机理和使阴极同样适用于真空电子管提供了希望。
It has proved that the superior emission capability of a new type impregnated dispenser cathode through impregnates the BaO/SrO/Sc2O3 active substances and covers a mixture W+BaO/SrO/Sc2O3 coating by the pulse laser deposition. However, the thermionic emission of this impregnated dispenser cathode at low temperature is not clear. Our results illustrate that the Current-voltage characteristics of this new impregnated dispenser cathode preserve unsaturated behavior. The maximum of the current density is 2.1 Acm-2 occurring at 650°C for the applied voltage from 0 to 3000 V. These results provide hope to further investigate the emission mechanism and make this cathode also applicable for vacuum electron tubes.