Conical cylinder shaped magnet based proton magnetic spectrometer

Abstract

The present invention discloses a conical cylinder shaped magnet based proton magnetic spectrometer. The proton magnetic spectrometer comprises a collimating slit, a conical cylinder shaped magnet device and a CR39 medium, wherein the collimating slit is used for introducing protons and filtering protons with relatively large horizontal divergence angles; the conical cylinder shaped magnet device comprises an outer shell, an inner shell, and permanent magnets which are fixed between the outer shell and the inner shell and are distributed radially; a space surrounded by all the permanent magnets forms a magnetic field loop capable of enabling the motion direction of filtered protons to be deflected; and the CR39 medium is used for recording proton signals after deflection so as to obtain proton energy spectrum information. The conical cylinder shaped magnet based proton magnetic spectrometer disclosed by the present invention is reasonable in structure, ingenious in design and small in volume, well solves the technical defects of large volume, low magnetic field strength and nonuniform magnetic field distribution of an existing proton magnetic spectrometer, and realizes effective acquisition of proton signals, therefore, the conical cylinder shaped magnet based proton magnetic spectrometer disclosed by the present invention is suitable for popularization and application.

Description

technical field [0001] The invention relates to the fields of plasma physics and nuclear detection, in particular to a proton magnetic spectrometer based on a cone-shaped magnet. Background technique [0002] When a charged particle moves in a magnetic field, if there is a velocity component in the direction perpendicular to the magnetic field, it will be subjected to Lorentz force, which will change the direction of motion of the charged particle. When the magnetic field is perpendicular to the direction of motion, the charged particles will move in a circle, and the lower the energy of the particle, the larger the radius of the circle. In this way, the energy of the particle can be obtained by analyzing the radius of the circle. A device that generates a magnetic field is usually called a magnetic spectrometer. [0003] According to the theory of electrodynamics, the static magnetic field energy of each permanent magnet is certain, and if these energies are confined in a ...

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Problems solved by technology

This kind of experiment involves a wide range, the experiment is difficult, and there are many difficulties in diagnosis.

Due to the large number of laser paths, the existing magnetic spectrometer is used. Because of its large cross-section (80mm*60mm), the distance between the magnetic spectrometer and the target pellet is at least 100mm, otherwise the laser light path will be blocked, which greatly limits the distance between the target pellet and the magnetic spectrometer. Due to the solid angle of the slit, the protons entering the magnetic spectrometer only account for about 3 / 10,000 of the total output, and it is difficult to collect effective proton signals in experiments with low proton output

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