Abstract
We report experimental results on a two frequency gyrotron, operating in the ${\rm TE}_{22,6}$ mode at 110 GHz and the ${\rm TE}_{24,7}$ mode at 124.5 GHz. The gyrotron uses the same electron gun as a previous single frequency 110-GHz gyrotron, with a new cavity and internal mode converter designed for optimized performance at the two frequencies. For a 98 kV, 42-A electron beam operating in 3- $\mu{\rm s}$ pulses, an output power of 1.25 MW was obtained at 110 GHz (30% efficiency) and 1.0 MW at 124.5 GHz (24% efficiency). The highest power obtained was 1.4 MW with a 96 kV, 45-A beam (32% efficiency) at 110 GHz. In both modes, mode competition was minimal around the high-power operating point and operation was extremely stable. The output power and efficiency in the ${\rm TE}_{24,7}$ mode were limited by the electron beam quality. At both frequencies, excellent Gaussian beam content was found: 1) 99% for the ${\rm TE}_{22,6}$ mode and 2) 97% for the ${\rm TE}_{24,7}$ mode. Both output beams had waist radii of 2.65 cm, in very good agreement with theory.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
