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Impulse-Breakdown Characteristics of a High-Power Gas Switch Based on Graphene Cathode.
- Source :
-
IEEE Transactions on Plasma Science . Oct2019, Vol. 47 Issue 10, p4567-4571. 5p. - Publication Year :
- 2019
-
Abstract
- Graphene has attracted great interest for its distinctive band structure and physical properties. Results from previous studies show that a graphene cathode can provide stable field emission and intense emission in a vacuum. In this paper, a graphene cathode was fabricated using chemical vapor deposition (CVD) on copper electrodes, and the breakdown of the cathode in a high-pressure gas was studied. A low-jitter, self-breakdown gas spark switch based on a graphene cathode is proposed in this paper. The impulse-breakdown characteristics of this switch in a quasi-uniform electric field were studied. When the gap length is 5 mm, and the gas pressure is 0.6 MPa, the average breakdown voltage ($U_{\mathrm {BD}}$) is nearly 85.9 kV, and the voltage jitter is only 3.2%; these values are much lower than those for pure copper cathodes and graphite cathodes. The graphene cathode is found to be a suitable choice for use as a high-power gas switch in applications requiring an intense emission source. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CATHODES
*GRAPHENE
*CHEMICAL vapor deposition
*COPPER electrodes
*FIELD emission
Subjects
Details
- Language :
- English
- ISSN :
- 00933813
- Volume :
- 47
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Plasma Science
- Publication Type :
- Academic Journal
- Accession number :
- 139437671
- Full Text :
- https://doi.org/10.1109/TPS.2019.2919350