Investigation and design of Denisov quasi-optical mode converter for 110 GHz gyrotron

Wang Bin; Huang Liangjie; Liu Yunlong; He Hong

doi:10.11884/HPLPB201527.073002

Volume 27 Issue 07

Jun. 2015

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Article Navigation > High Power Laser and Particle Beams > 2015 > 27(07): 073002

Wang Yu, Li Hongtao, Wang Wendou, et al. Simulation study on performances of rod-pinch diode on 1.2 MV X-ray generator Scorpio[J]. High Power Laser and Particle Beams, 2015, 27: 095005. doi: 10.11884/HPLPB201527.095005

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Wang Bin, Huang Liangjie, Liu Yunlong, et al. Investigation and design of Denisov quasi-optical mode converter for 110 GHz gyrotron[J]. High Power Laser and Particle Beams, 2015, 27: 073002. doi: 10.11884/HPLPB201527.073002

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Investigation and design of Denisov quasi-optical mode converter for 110 GHz gyrotron

doi: 10.11884/HPLPB201527.073002

1.
College of Electronics Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China

Received Date: 2015-03-20
Rev Recd Date: 2015-05-12
Publish Date: 2015-06-23

Abstract

Abstract

A quasi-optical mode converter for high power gyrotron, consisting of a Denisov launcher and four mirror reflectors is designed and studied. Applying the geometrical optics, the operation mechanism of the Denisov launcher is analyzed in detail and the Gauss-like field distribution achieved on the inner wall is derived. The method for designing a dimpled wall launcher is proposed based on coupled mode theory. As an example, the launcher and mirror parameters are selected and optimized for a 110 GHz, TE22,6 mode gyrotron. Finally, a simulation code is developed to calculate the field distribution at aperture or on the mirrors. Numerical result indicates that a Gaussian-like beam is obtained through the output window, which scalar content is 95.8% and the conversion efficiency of the system is 94.7%.
- gyrotron,
- quasi-optical mode converter,
- Denisov launcher,
- coupled mode theory,
- Gaussian beam

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