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A terahertz gyrotron side gallery mode-back wave interaction circuit and its control method

A technology of interaction and gyrotron, which is applied to the circuit components of transit time electron tubes, electron tubes with speed/density modulation electron flow, etc., can solve the problems of inhibiting the stable output of the working mode, taking the initiative, etc., and achieving the inhibition mode competition , the improvement of the starting current curve, and the effect of single-mode stable and high-efficiency output

Active Publication Date: 2020-01-21
PEKING UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

During the time-domain dynamic simulation process, the competition mode is very easy to take the initiative in the start-up phase, inhibiting the stable output of the working mode

Method used

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  • A terahertz gyrotron side gallery mode-back wave interaction circuit and its control method
  • A terahertz gyrotron side gallery mode-back wave interaction circuit and its control method
  • A terahertz gyrotron side gallery mode-back wave interaction circuit and its control method

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Embodiment Construction

[0036] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0037] Such as figure 1 As shown, the interaction circuit in the prior art terahertz gyrotron return wave oscillator includes three sections: the cut-off section, the main cavity and the upper gradient output section. The main cavity is a cavity with a uniform inner diameter and a radius of r w0 , the front end radius of the cut-off section is r c0 =0.99r w0 , the end radius of the upper gradient output segment is r u0 =1.01r w0 ;The axial lengths are: the axial length L of the cut-off section c0 =3mm, the axial length L of the main cavity m0 =12mm, the axial length L of the upper gradient output section u0 = 7 mm. The working frequency of the main cavity is set to 250GHz, and the working mode is selected as the high-order corridor mode TE 12,2 , the main radius r of the main cavity in the circular waveguide interaction circuit w0...

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Abstract

The invention discloses a terahertz gyrotron gallery mold backward wave interaction circuit and a control method thereof. According to the circuit and the control method, two gradation structures areled into a main cavity body, so that the nonuniformity of the circuit is improved; the cut-off frequency of a main high angular index competition mode is higher than that of an operating mode, so thata start oscillation characteristic of the circuit is that the circuit is particularly sensitive to a nonuniform circuit in a single-cavity oscillation state; a start oscillation current curve is greatly improved and effectively inhibited; and single-mode stable high-efficiency output of a high-order gallery operating mode is achieved. The circuit can specifically inhibit mode competition nearby the high-order gallery mode in a terahertz gyrotron backward wave oscillator; the operating stability and the operating efficiency of the gyrotron backward wave oscillator can be improved; and the significance from microwave and millimeter wave bands to a terahertz wave band is important for the gyrotron backward wave oscillator.

Description

technical field [0001] The invention relates to gyrotron technology, in particular to a terahertz gyrotron side gallery mode-back wave interaction circuit and a control method thereof. Background technique [0002] As an oscillator based on the principle of electronic gyrotron maser, the gyrotron can not only generate high power output, but also realize broadband frequency modulation output under the condition of changing the accelerating voltage or magnetic field strength. With the rapid development of terahertz science and technology, the demand for electromagnetic wave sources in the fields of material science and biomedicine has become increasingly prominent. The development of high-efficiency and high-power frequency modulation output gyrotron return wave oscillators in the terahertz frequency band has become an important development direction. [0003] When the gyrotron return-wave oscillator works in lower frequency bands such as microwave and millimeter wave, it usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/16H01J25/02
Inventor 杜朝海潘石高子超李繁弘刘濮鲲
Owner PEKING UNIV
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