Resonant cavity system with adjustable resonant frequency and regulation and control method thereof

Abstract

According to the resonant cavity system with the adjustable resonant frequency and the regulation and control method of the resonant cavity system, two reflectors are adopted as a resonant cavity body, a lens and a beam splitting piece are adopted for excitation coupling, the axial direction of the reflectors and the axial direction of the lens are mutually orthogonal, 45-degree angles are formed between the reflectors and the axial direction of the beam splitting piece, and the incident direction of electromagnetic waves is the axial direction of the lens. External Gaussian beams are bunched in the center of the beam splitting piece through the lens, and then the propagation direction of electromagnetic waves is deflected by 90 degrees through the beam splitting piece, so that resonance is generated. The two reflectors are installed on the stepping piezoelectric actuator, the distance between the reflectors is adjusted through the actuator, and whether the resonant cavity reaches a resonant state or not is observed through a perturbation and observation method, so that closed-loop adjustment of the resonant frequency of the resonant cavity is achieved. According to the invention, the resonant frequency of the resonant cavity is accurately regulated and controlled, so that the performance of the electron spin resonance spectrometer is improved.

Description

A resonant cavity system with adjustable resonant frequency and its control method technical field The invention belongs to the field of terahertz resonant cavity, more specifically, relate to a kind of resonant cavity system with adjustable resonant frequency and its control methods. Background technique Electron spin resonance is a spectroscopic method for directly detecting unpaired electrons in a sample material. It is an important means for the structure of paramagnetic substances such as radicals, which can accurately and non-destructively obtain substances at the electronic and nuclear scales. Information is widely used in physics, chemistry, biology, medicine and other fields. Electron Spin Resonance Spectrometers are Electron Spin Resonance The core technology and research basis, it is an analytical instrument for electron spin resonance. Electron spin resonance spectrometers are composed of many systems, The sample cavity system is the place where the e...

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Problems solved by technology

[0005] In view of the defects of the prior art, the object of the present invention is to provide a resonant cavity system with adjustable resonant frequency and its regulation method, aiming at solving the problem that the resonant cavity system of electron spin resonance spectrometer seriously limits the operating frequency of the spectrometer

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