Dispenser cathodes have attracted attention in both industrial and academic research for a long time, due to their application as high-brightness electron sources. Since most modern cathodes utilize tungsten as the base material, it is useful to investigate how novel forms of tungsten can influence a cathode. In the present study, nanoscale tungsten particles were generated by physical vapor deposition and deposited onto substrates, to gauge the effectiveness of generating a tungsten coating that can enhance electron emission. These nanoparticles were characterized by scanning and transmission electron microscopy. The tungsten particles formed a continuous nanoporous structure, along with discrete larger particles on the substrate.
|Title of host publication||2020 IEEE 21st International Conference on Vacuum Electronics, IVEC 2020|
|Number of pages||2|
|State||Published - Oct 19 2020|
|Event||21st IEEE International Conference on Vacuum Electronics, IVEC 2020 - Monterey, United States|
Duration: Oct 19 2020 → Oct 22 2020
|Name||2020 IEEE 21st International Conference on Vacuum Electronics, IVEC 2020|
|Conference||21st IEEE International Conference on Vacuum Electronics, IVEC 2020|
|Period||10/19/20 → 10/22/20|
Bibliographical noteFunding Information:
This work was financially supported by the Defense Advanced Research Projects Agency (DARPA) Innovative Vacuum Electronics Science and Technology (INVEST) program, under grant number N66001-16-1-4041. The views, opinions, and/or findings expressed are those of the author(s) and should not be interpreted as representing the official views or policies of the Department of Defense or the U.S. Government.
© 2020 IEEE.
- Physical Vapor Deposition
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials