Terahertz radiation generation method based on interaction of multiple electron beams and plasma

A terahertz radiation and plasma technology, which is applied in the field of terahertz radiation generation, can solve the problems of poor coherence and directionality, large size of terahertz source, and disordered spectrum, and achieves pure spectrum, small size, and flexible adjustment of frequency and direction. Effect

Active Publication Date: 2021-06-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a method for generating terahertz radiation based on the interaction between multiple electron beams and plasma, and to solve the problems of existing beams through a new physical mechanism of interaction between multiple electron beams and plasma. —The disadvantages of plasma system terahertz source are large volume, high cost, cluttered spectrum, poor coherence and directivity

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  • Terahertz radiation generation method based on interaction of multiple electron beams and plasma
  • Terahertz radiation generation method based on interaction of multiple electron beams and plasma
  • Terahertz radiation generation method based on interaction of multiple electron beams and plasma

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Embodiment

[0025] figure 2 It is a specific implementation block diagram of the present invention based on the interaction between multiple electron beams and plasma to generate terahertz radiation.

[0026] In this example, if figure 2 As shown, the interaction between two beams of electrons and plasma to generate terahertz radiation will be described in detail, which specifically includes the following steps:

[0027] S1. Utilize the plasma source (1) to ionize the neutral gas to generate a certain density of 10 in the vacuum chamber (3). 19 m -3 ~10 25 m -3 The plasma (2), the plasma moves directional in the vacuum cavity (3), and is finally absorbed by the plasma collector (12); in addition, the radiation frequency can be extended to other arbitrary frequency bands by adjusting the plasma density , such as: microwave band, infrared band, etc.

[0028] S2. Pre-adjust the angle between the two electron guns (4), (5), so that the electron beams emitted by them can form a converg...

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Abstract

The invention discloses a terahertz radiation generation method based on interaction of multiple electron beams and plasma. The method comprises the following steps of ionizing a neutral gas by using a plasma source, and generating plasma in a certain density range in a vacuum cavity; injecting a plurality of (two or more) electron beams into the plasma at a certain emission included angle, adjusting the emission included angle between the electron beams in advance to enable the electron beams to form a convergence point in the plasma, and when the electron beams converge to one point in the plasma, exciting plasma waves at the convergence point; and finally, enabling the plasma wave to cause the electron oscillation at the electron beam convergence point, so that the high-power terahertz radiation with the frequency located at the plasma frequency and the frequency doubled by the plasma frequency is excited.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic radiation, and more specifically relates to a method for generating terahertz radiation based on the interaction between multiple electron beams and plasma. Background technique [0002] Terahertz radiation refers to the frequency between 0.1THz and 10THz (1THz=10 12 Hz) electromagnetic radiation. Electromagnetic radiation in this band occupies a special position on the electromagnetic spectrum, belonging to the transition region from classical physics to quantum physics, and from electronics to photonics. Terahertz radiation has some physical properties that electromagnetic waves in other bands do not have, such as: high penetration, low damage, ultra-high bandwidth, material fingerprint characteristics, etc. with broadly application foreground. [0003] As the basis for many applications of terahertz radiation, terahertz sources have important research value. In recent years, a new t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/02H05H1/24
CPCH01S1/02H05H1/24
Inventor 杨生鹏宫玉彬王少萌王战亮
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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