Investigation of mode interaction for a gyrotron with dense mode spectrum

ABSTRACT

Influence of the density of mode spectrum in the gyrotron cavity on the possibility of stable single-mode operation has been investigated for high-order modes. Interaction of the operating mode with its two neighboring satellites, symmetrically spaced in frequency, is analyzed. Some threshold value of mode spectrum density dependent on the beam current is found.

KEYWORDS:

• Vacuum electronics
• gyrotrons
• high-power microwave generation
• millimeter wave devices
• terahertz radiation

Acknowledgements

This work was supported by IAP RAS project 0035-2019-0001 and Russian Foundation for Basic Research, grant # 18-02-00839.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by IAP RAS project 0035-2019-0001 and Russian Foundation for Basic Research, grant # 18-02-00839.

Notes on contributors

Vladimir L. Bakunin

Vladimir L. Bakunin, Graduated at the Nizhny Novgorod State University in 2009. Currently he is junior researcher of the Department of Electronic Devices of IAP RAS and is working towards PhD degree. His current research interests include nonlinear dynamics and frequency stabilization of MW-power gyrotrons for ECRH&CD systems in future fusion setups and for large complexes of coherently radiating gyrotrons for THz data and energy transmission.

Mikhail Yu. Glyavin

Mikhail Yu. Glyavin, Graduated at the Nizhny Novgorod Polytechnical Institute in 1988. In 1999 obtained PhD degree, in 2009 obtained Doctor of Science degree. Currently he is the head of the Department of Electronic Devices of IAP RAS and Deputy Director in science. His research interests include theoretical and experimental investigations of gyrotrons and its application for microwave processing of materials, spectroscopy, gas discharge, etc.

Gregory G Denisov

Gregory G. Denisov, Graduated at the Nizhny Novgorod State University in 1978. In 1985 obtained PhD degree, in 2002 obtained Doctor of Science degree. Currently he is corresponding member of RAS and Director of IAP RAS. His research interests include development of MW-power gyrotrons for ECRH&CD, frequency tunable gyro-TWT with broad amplification band, transmission lines for powerful microwaves.

Yulia V. Novozhilova

Yulia V. Novozhilova, Graduated at the Niznhy Novgorod State University in 1982. In 1995 obtained PhD degree. Currently she is the senior researcher of the Department of Electronic Devices of IAP RAS. Her current research interests include nonlinear dynamics and control of phase and frequency of MW-power gyrotrons under the influence of the external signal for large complexes of coherently radiating gyrotrons.