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Cylindrical electron paramagnetic resonance probe for detecting external sample

A paramagnetic resonance, cylindrical technology, which is applied in the fields of analysis, diagnostic recording/measurement, medical science, etc. using electron paramagnetic resonance, can solve problems such as limitations, and achieve easy processing and production, reduced impact, and simple structure. Effect

Active Publication Date: 2013-04-10
INST OF RADIATION MEDICINE ACAD OF MILITARY MEDICAL SCI OF THE PLA
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Problems solved by technology

However, limited by the working conditions of the traditional EPR spectrometer, it is necessary to extract and crush the teeth of the irradiated subjects, so the application of EPR dose estimation is limited

Method used

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  • Cylindrical electron paramagnetic resonance probe for detecting external sample

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Embodiment Construction

[0013] The probe built-in microwave cavity has a radius of 12 mm and a height of 12 mm. The probe shell is 34 mm long, 15 mm wide, and 27 mm high. The structural material of the probe is copper and the surface is plated with silver. The width of the rectangular longitudinal through opening of the detection port is 3 mm, and the depth along the radial direction is about 2.5 mm. The wide side of the trapezoidal detection port is 8 mm. The modulation coil is fixed at 5cm on both sides of the center of the detection port, and a 100kHz modulation current is applied. The probe is connected with the microwave system of the paramagnetic resonance spectrometer through the deployment unit and the waveguide. The microwave resonant frequency is 9.55G Hz, and the microwave field type of the probe cavity is TM010. The practical application effect is as follows: using the probe described in the present invention to detect diphenylpicrylhydrazine free radical (DPPH) spot samples, good EPR sp...

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Abstract

The invention relates to a cylindrical electron paramagnetic resonance probe capable of locally detecting an external sample. The probe is rectangular; a cylindrical microwave cavity is formed inside the probe; a polygon sample detecting hole is formed in the center of the top surface of the probe; the detecting hole penetrates longitudinally to the interior of a microwave cavity body space in the wall thickness direction, and penetrates through in the cavity thickness direction; a long edge of the detecting hole cuts a microwave magnetic field component in a resonant cavity and is parallel to the current line direction of the detecting hole in the cavity wall; a pair of coils for providing a regulated magnetic field is placed on the both sides of the detecting hole, and generates the regulated magnetic field required by paramagnetic resonance at the detecting hole; a coupling is coupled with a tuning unit by a coupling hole; and a coupling constant of the resonant cavity and a microwave system is regulated by an adjusting bolt outside the coupling hole. The probe is mainly used for conducting local EPR (electron paramagnetic resonance) detection on the sample that a whole structure is inconvenient to damage.

Description

technical field [0001] The invention relates to an electron paramagnetic resonance detection device, in particular to a cylindrical probe capable of performing electron paramagnetic resonance detection on an external sample. The probe consists of a cylindrical microwave resonant cavity, a detection port and a coupling and tuning unit. The volume and shape of this specially designed probe are suitable for external samples, and even deep into the local sample for electron paramagnetic resonance detection. It belongs to the technical field of new technologies and methods of biophysics. Background technique [0002] Electron paramagnetic resonance (EPR for short) is a technique used to detect the Zeeman energy level transition of the spin magnetic moment of uncoupled electrons in matter. This technique can be used to analyze the content and properties of paramagnetic centers such as free radicals, transition metal elements, and lattice defects contained in substances. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/10A61C19/04A61B5/055
Inventor 吴可郭俊旺袁清泉丛建波董国福马蕾
Owner INST OF RADIATION MEDICINE ACAD OF MILITARY MEDICAL SCI OF THE PLA
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