The work function of a scandate cathode prepared using the L-S technique, and measured in vacuum at elevated temperature, is presented here. The scandate cathode had undergone emission testing and displayed excellent emission behavior in a close-spaced diode testing apparatus, before the work function measurements were carried out. The work function at room temperature was measured to be 4.81 eV, and this value tended to decrease as the temperature was raised to 800°C, with a minimum value existing at 600°C. The implications for this behavior are also discussed.
|Title of host publication||2018 IEEE International Vacuum Electronics Conference, IVEC 2018|
|Number of pages||2|
|State||Published - Jun 20 2018|
|Event||19th IEEE International Vacuum Electronics Conference, IVEC 2018 - Monterey, United States|
Duration: Apr 23 2018 → Apr 26 2018
|Name||2018 IEEE International Vacuum Electronics Conference, IVEC 2018|
|Conference||19th IEEE International Vacuum Electronics Conference, IVEC 2018|
|Period||4/23/18 → 4/26/18|
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.
© 2018 IEEE.
- Kelvin probe
- dispenser cathode
- scandate cathode
- work function
ASJC Scopus subject areas
- Electrical and Electronic Engineering