Barium Dispenser Cathode Operation in a Cesium Vapor Environment for Applications in Thermionic Converters

被引：1

作者：

Velazquez, Daniel ^{[1
]}

Lu, Hsin-, I ^{[1
]}

Stone, Mark ^{[1
]}

Merthe, Daniel ^{[1
]}

机构：

[1] Modern Electron LLC, Bothell, WA 98011 USA

来源：

2020 IEEE 21ST INTERNATIONAL CONFERENCE ON VACUUM ELECTRONICS (IVEC 2020) | 2020年

关键词：

Barium dispenser cathode; cesium vapor; cathode activation; cathode reactivation; thermionic converters;

D O I：

10.1109/IVEC45766.2020.9520500

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Thermionic converters are devices that convert heat directly into electricity with no moving parts. Thermionics require a high current density emission source. Historically, Ba dispenser cathodes have not been used in thermionic converters due to practical limitations surrounding poor background pressure in thermionics. Here we measure the impact of cesium exposure on the performance of a Ba dispenser cathode that that had previously been exposed to air. Measurements indicate that cesium exposure accelerates cathode activation and increases current density, even in the case of unconventionally high base pressures (>10(-7) Torr).

引用

页码：95 / 96

页数：2