High-power millimeter wave output window testing and aging device and method

Abstract

The invention provides a high-power millimeter wave output window testing and aging device, which comprises a high-power millimeter wave source, an absorption load, a reflection grating, a dielectric window sheet, a reflector M1 and a reflector M2; the metal reflection grating is used for performing beam splitting on high-power electromagnetic waves propagating in a quasi-Gaussian mode, and a part of wave beams are extracted to form a traveling wave resonant ring; the traveling wave resonant ring is adjusted to work in a resonant state, so that the dielectric constant of the dielectric window sheet is calculated; meanwhile, the dielectric window sheet is screened and aged under the condition that the equivalent power is higher than that of a microwave source by utilizing the gain effect of the traveling wave resonant ring. Parameter measurement can be directly carried out on a dielectric window sheet or a dielectric window assembly which is actually used under a high-power condition, and a measurement result better accords with an actual condition; screening of qualified window sheets can be achieved, and window sheets which have defects and cannot be improved are removed; the window can be aged under the condition that the equivalent power is higher than the output power of a microwave source, and the power capacity of the window is improved.

Description

technical field [0001] The invention relates to the field of output window testing and aging, in particular to a high-power millimeter wave output window testing and aging device and method. Background technique [0002] In the experimental research of magnetic confinement thermonuclear fusion, it is necessary to use high-power millimeter waves for electron cyclotron resonance heating. The high-power millimeter-wave source is usually an electric vacuum device (gyrotron) with a high-vacuum environment inside. The interior of the host of the magnetic confinement thermonuclear fusion experimental device is also a vacuum chamber. Therefore, during the process of electromagnetic waves outputting from the millimeter wave source to entering the host vacuum chamber, there must be a vacuum-encapsulated dielectric window to isolate the vacuum and effectively transmit high-power millimeter waves. When transmitting high-power millimeter waves, strict requirements are placed on the die...

AI Technical Summary

Problems solved by technology

[0004] In the millimeter wave band, the existing measurement methods (including dielectric constant and loss tangent) can only be carried out under low power conditions, while under high power conditions, due to the influence of electromagnetic wave loss inside the dielectric window, the dielectric constant and The loss tangent will change significantly

Therefore, the results measured under low power conditions are not accurate

However, the existing aging technology can only be carried out with the vacuum tube and transmission line system, and cannot be screened in advance. Once damaged, the replacement cost is very high

Especially if the dielectric window of the electric vacuum tube itself is damaged, the entire electric vacuum tube will be useless, which is too expensive

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