Terahertz magnetic radiation source

A technology of tz magnetic radiation and slow wave structure, which is applied in the field of terahertz magnetic radiation sources, can solve the problems of high current density of oscillation and cannot meet the requirements of generating higher frequency terahertz waves, and achieves the reduction of current density and high electromagnetic radiation. , the effect of high frequency

Inactive Publication Date: 2016-07-06
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0006] In view of this, the present invention provides a terahertz magnetic radiation source to solve the problem in the prior art that the starting current density is relatively high and cannot meet the requirements for generating higher frequency terahertz waves

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] In one embodiment of the present invention, a terahertz magnetic radiation source is provided, such as figure 2 As shown, it is a two-dimensional cross-sectional view of a terahertz magnetic radiation source, and the terahertz magnetic radiation source includes: an electron gun 21 , a first slow wave structure, a drift section 23 , a second slow wave structure and an electron beam collector 26 . For the convenience of the following description, define ...

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Abstract

The invention provides a terahertz magnetic radiation source. The terahertz magnetic radiation source comprises an electron gun, an electron beam collection pole, a first slow wave structure, a drift segment and a second slow wave structure, wherein the first slow wave structure is arranged between the electron gun and the electron beam collection pole, an electron beam and the first slow wave structure jointly act to generate a cluster, the first slow wave structure is used for modulating the travelling speed and the density of the electron beam to form an initial electron string, the drift segment is arranged between the first slow wave structure and the electron beam collection pole and is used for clustering the initial electron string to form a modulated electro string, the second slow wave structure is arranged between the drift segment and the electron beam collection pole, the modulated electron string and the second slow wave structure jointly act to generate electromagnetic oscillation, and the frequency of the electromagnetic oscillation is an integer multiple of the modulation frequency during modulation of the electron beam by the first slow wave structure. The coupling strength between a coherent incident field of the modulated electron string and a high-frequency field in the second slow wave structure is higher than that between a non-coherent incident field of the continuous electron beam and the high-frequency field, and thus, the starting oscillation current density of the terahertz source is reduced.

Description

technical field [0001] The invention relates to the field of vacuum electronics, in particular to a terahertz magnetic radiation source. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency between 0.1THz and 10THz, which is the only wave band in the electromagnetic spectrum that has not been fully developed so far. Because of its broad application prospects in many fields such as life science, material science, communication technology and national security, it has attracted widespread attention from scientists at home and abroad. As an emerging discipline, terahertz science and technology is gradually taking shape. The development of terahertz magnetic radiation sources is the basis for the development of terahertz science and technology, and it is also the main bottleneck restricting the development of terahertz science and technology. [0003] The Backward Wave Oscillator (BWO for short) based on the traditional vacuum electronic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J25/02H01J23/38
CPCH01J25/02H01J23/38
Inventor 刘维浩陆亚林贾启卡
Owner UNIV OF SCI & TECH OF CHINA
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