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Special three - mirror quasi- optical resonator diffraction radiation oscillator

Author: ChenHuaSheng
Tutor: LiuShengGang
School: University of Electronic Science and Technology
Course: Plasma Physics
Keywords: Terahertz Three - mirror quasi- optical cavity Coherent radiation Particle simulation
CLC: TN752
Type: Master's thesis
Year: 2008
Downloads: 48
Quote: 0
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Abstract


Diffraction radiation oscillators are based on the Smith - Purcell effect, quasi-optical resonator, and the diffraction grating composed of the high-frequency interaction system a vacuum electronic devices, and the interaction of the electron beam and the electromagnetic fields of the device efficiency is relatively low, of diffraction grating machining constraints device development to shorter wavelengths. Thus we introduce a special three-mirror quasi-optical system, proposed research programs of the special three-mirror quasi-optical cavity ring electron beam excitation axis symmetrical three mirrors, diffraction grating system to produce terahertz radiation diffraction radiation oscillator. Annular electron beam stability than the sheet electron easy molding and focus; special field distribution of three-mirror quasi-optical cavity and a reliable and simple energy output system, using a three-mirror quasi-optical cavity to increase the electron beam interaction with the high-frequency field range, to improve the output efficiency. Papers on the diffraction grating and three-mirror quasi-optical cavity theoretical analysis and computer simulation, based on a special three-mirror quasi-optical resonator diffraction radiation oscillator model and axisymmetric three mirror quasi-optical system for a computer simulation of the \Thesis to complete the following tasks: 1) According to the a rectangular grating \study, research shows that: when the harmonic frequency and a certain angle Smith - Purcell radiation frequency, in the nearby area of ??the angle formed with the same coherent radiation. 2) analysis of the interaction of the electron beam with the wave theory; according to the election of the three-mirror quasi-optical cavity frequency mechanisms and feedback effects, using computer simulations to verify the second harmonic of the three-mirror quasi-optical cavity surface wave resonance amplified feasibility. 3) The proposed the axisymmetric rotating three-mirror quasi-optical cavity diffraction radiation oscillator model, which fully take advantage of the three-mirror quasi-optical cavity easy and reliable energy output system coupled output power. According to the model, the frequency of 225GHz three-mirror quasi-optical diffraction radiation oscillator cavity particles simulated power 380W output. At the same time through a three-mirror quasi-optical system superradiant Smith - Purcell effect can be directed output. Diffraction radiation oscillator SAW second harmonic of the three-mirror quasi-optical resonator of this work to the development of vacuum electron learn terahertz radiation source has a certain reference value.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Oscillation technique,the oscillator > Oscillator
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