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Method and device capable of improving high-power microwave breakdown threshold of dielectric window

A high-power microwave and dielectric window technology, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as dielectric window vacuum side breakdown, achieve the effect of increasing the breakdown threshold and suppressing the multiplication of secondary electrons

Active Publication Date: 2011-05-04
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and device that can increase the high-power microwave breakdown threshold of the dielectric window, so as to solve the problem of high-power microwave output dielectric window vacuum side breakdown in the prior art

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  • Method and device capable of improving high-power microwave breakdown threshold of dielectric window
  • Method and device capable of improving high-power microwave breakdown threshold of dielectric window
  • Method and device capable of improving high-power microwave breakdown threshold of dielectric window

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Embodiment Construction

[0025] To analyze the principle of suppressing multiplication through kinetics, firstly, it is necessary to explain the secondary electron emission yield curve, such as figure 1 As shown, the curve has two intersections ε 1 And ε 2 , When the electron collision energy is at ε 1 And ε 2 When the secondary yield is greater than 1, the electron collision energy ε is accelerated through resonance e >ε 2 , You can achieve multiplication suppression.

[0026] Electron in microwave electric field E rf The multiplication trajectory under the combined action of the external magnetic field with the magnetic induction intensity of B is as figure 2 Shown. The magnetic field is parallel to the medium surface and perpendicular to E rf , Satisfies that the cyclotron frequency Ω is close to the microwave frequency ω, where Ω=eB / m, e is the amount of electron charge, and m is the electron mass. For ω=2.85*2πGHz, B~0.1T. When E rf The direction of the ×B vector is far away from the medium surface...

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Abstract

The invention relates to a method and a device capable of improving a high-power microwave breakdown threshold of a dielectric window. An external resonant magnetic field which is parallel to the surface of the dielectric window and perpendicular to an electric field component of a high-power microwave is applied to the vacuum side of the dielectric window; the resonant magnetic field accords with the condition that omega is equal to (0.5-2) ohms; and collision energy acquired by electronic resonance acceleration is higher than that at a second crossing point of a secondary yield curve. The device comprises two rectangular H-surface bent waveguides, a cylindrical box-shaped dielectric window and a solenoid coil, wherein the cylindrical box-shaped dielectric window is connected with the two rectangular H-surface bent waveguides for conveying a TE11 module; and an axial magnetic field produced by the solenoid coil is parallel to the surface of the dielectric window and perpendicular to the conveyed TE11 module. The method and the device have the advantages of improving the breakdown threshold of a dielectric surface.

Description

Technical field [0001] The invention relates to a method and a device that can increase the breakdown threshold of high-power microwaves of a dielectric window. Background technique [0002] High-power microwave (HPM) generally refers to electromagnetic radiation with a frequency of 300MHz to 300GHz, a pulse power exceeding 100MW or an average power of 1MW. The HPM system is the coherent electromagnetic radiation generation, transmission and emission system. The microwave source and transmission system of the general HPM system work under vacuum. [0003] HPM system transmission and launch systems usually require dielectric windows to achieve vacuum sealing. With the increase in the power generated by the HPM source, the vacuum side breakdown of the HPM dielectric window limits the maximum power that the HPM system can transmit and radiate, which has become a bottleneck for the development of GW-level HPM and one of the serious problems to be solved urgently. The main cause of b...

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Application Information

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IPC IPC(8): H01P1/08
Inventor 常超方进勇陈昌华黄惠军邵浩
Owner NORTHWEST INST OF NUCLEAR TECH
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