Observation of Multi-Peak Frequency Spectrum in A High Power Sub-THz Gyrotron
- Resource Type
- Conference
- Authors
- Saito, Teruo; Tanaka, Shunsuke; Shinbayashi, Ryuji; Yamaguchi, Yuusuke; Fukunari, Masafumi; Tatematsu, Yoshinori; Melnikova, Maria M.; Ryskin, Nikita M.
- Source
- 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2019 44th International Conference on. :1-2 Sep, 2019
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Oscillators
Gyrotrons
Cavity resonators
Reflection
Time-frequency analysis
Magnetic fields
- Language
- ISSN
- 2162-2035
Equi-distantly distributed multi-peak frequency spectrum was observed in a high power 300 GHz band gyrotron for the case of strong reflection off the vacuum window. An oscillation mode different from the design mode can oscillate by adjusting the magnetic field in the cavity. However, a large fraction of the output wave is reflected by the vacuum window. A theoretical calculation shows that the multi-peak frequency spectrum stems from periodic amplitude oscillation that is caused by mode competition between the oscillating co-rotating mode and the counter-rotating mode originating from the reflected wave.