Abstract
Dispenser cathodes operate in a high vacuum environment when used as thermionic emitters in vacuum electron devices. Although significant materials research has been performed on cathodes in recent years, limitations of techniques or instrumentation have made it difficult to obtain real-time observations of dispenser cathodes in a dynamic (heated) state using high-resolution techniques such as advanced scanning electron microscopy. In the present study, to observe and better understand how cathode materials and morphologies were created, the authors performed high temperature in situ heating experiments on impregnated cathode pellet pieces in an SEM, to monitor W faceting and impregnant behavior during heating, in real time.
Original language | English |
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Title of host publication | 2022 23rd International Vacuum Electronics Conference, IVEC 2022 |
Pages | 238-239 |
Number of pages | 2 |
ISBN (Electronic) | 9781665443258 |
DOIs | |
State | Published - 2022 |
Event | 23rd International Vacuum Electronics Conference, IVEC 2022 - Monterey, United States Duration: Apr 25 2022 → Apr 29 2022 |
Publication series
Name | 2022 23rd International Vacuum Electronics Conference, IVEC 2022 |
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Conference
Conference | 23rd International Vacuum Electronics Conference, IVEC 2022 |
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Country/Territory | United States |
City | Monterey |
Period | 4/25/22 → 4/29/22 |
Bibliographical note
Publisher Copyright:© 2022 IEEE.
Keywords
- faceting
- impregnant
- in situ heating
- scandate cathode
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
- Instrumentation