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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: 2014-12-03
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 inhibition multiplication through kinetics, it is first necessary to explain the secondary electron emission yield curve, such as figure 1 As shown, the curve has two intersection points ε 1 and ε 2 , when the electron collision energy is at ε 1 and ε 2 Between , the quadratic yield is greater than 1, and the electron collision energy ε is accelerated by resonance acceleration e >ε 2 , doubling suppression can be achieved.

[0026] Electrons in the microwave electric field E rf Under the joint action of the external magnetic field with magnetic induction intensity B, the doubling trajectory is as follows figure 2 shown. The magnetic field is parallel to the medium plane and perpendicular to E rf , satisfying that the cyclotron frequency Ω is close to the microwave frequency ω, where Ω=eB / m, e is the 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 ...

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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 capable of increasing the breakdown threshold of a dielectric window high-power microwave. Background technique [0002] High-power microwave (HPM) generally refers to electromagnetic radiation with a frequency between 300MHz and 300GHz and 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 a general HPM system work in a vacuum state. [0003] HPM system transmission and launch systems often require dielectric windows to achieve a vacuum seal. With the increase of the power generated by the HPM source, the breakdown of the vacuum side of the HPM dielectric window limits the maximum power that the HPM system can transmit and radiate. The main reason for the breakdown on the vacuum side of the surface of the medium is that electrons undergo secondary...

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Application Information

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Patent Type & Authority Patents(China)
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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