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Role of dc space charge field in the optimization of microwave conversion efficiency from a modulated intense relativistic electron beam.
- Source :
-
Journal of Applied Physics . Dec2013, Vol. 114 Issue 21, p214503. 5p. - Publication Year :
- 2013
-
Abstract
- We demonstrate an efficiency of 70% with 5.1 GW microwave power for a diode voltage of 770 kV and a current modulation coefficient of 1.67 in a klystron-like relativistic backward wave oscillator. The device combines the advantages of reducing electron beam radius, adopting dual-cavity extractor, and introducing two pre-modulation cavities. A large dc space charge field is present due to the conversion of considerable potential energy to kinetic energy at the end of beam-wave interaction region. A nonlinear theory is developed to show that the dc space charge field can increase the current modulation coefficient and microwave conversion efficiency significantly. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 114
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 92762657
- Full Text :
- https://doi.org/10.1063/1.4839355