Method for constructing magnetic spectrograph for measuring power spectrum of charged particle to reduce caliber error

Abstract

The invention discloses a method for constructing a magnetic spectrograph for measuring power spectrum of charged particles to reduce caliber errors. The method includes the steps of designing the shape of the bottom support if a detector and constructing a magnetic spectrograph. A simple and compact structure is provided, the bottom support is designed because the primary focusing position of a charged particle beam accords with the characteristics of a hyperbola, and system errors caused by introduction of a filling hole are reduced greatly. Moreover, in the center of a multi-position magnetic field of an effective region through which particles pass, the influence of boundary effects is slight, the measurement precision is improved substantially, and the method is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of charged particle energy spectrum measurement, in particular to a construction method of a magnetic spectrometer for measuring charged particle energy spectrum and reducing aperture errors. Background technique [0002] A magnetic spectrometer is an instrument that uses the characteristic that the deflection radius of charged particles changes with energy (kinetic energy) in a magnetic field to measure the energy spectrum distribution of charged particles. Existing magnetic spectrometers are usually as figure 1 As shown, a uniform and closed magnetic field area is formed inside the magnetic spectrometer by the permanent magnet 6, the magnetic conductor middle frame 2 and the sealing plate 1. The detection medium 7 is fixed on a bottom mop, and the detection medium is sent into a specific position of the magnetic field through the bottom mop. Location. The magnetic spectrometer is aimed at the emission source throu...

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Problems solved by technology

However, this traditional magnetic spectrometer has a significant disadvantage that the system error is introduced by the aperture of the injection hole, such as figure 1 As shown in (c), it is proportional to the size of the pore, and the number of injected particles is related to the size of the pore. In order to ensure the number of injected particles, the injection hole must maintain a certain size

In addition, the traditional magnetic spectrometer ignores the attention to the design of the injection hole structure, and it is easy to cause the particles with points to be leaked before entering the uniform field area and deflected by the non-uniform magnetic field at the edge, resulting in the particles not being able to deposit at the calculation drop point and increasing the measurement error.

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