Electron magnetic spectrometer for measuring superthermal electron energy spectrum

Abstract

The invention discloses an electron magnetic spectrometer for measuring a superthermal electron energy spectrum.The electron magnetic spectrometer comprises a magnetic field cavity and light sensing assemblies.Openings are formed in at least two adjacent side walls of the magnetic field cavity respectively and located in the side wall adjacent to or opposite to the side wall where an incidence hole is located.Each light sensing assembly is inserted in the magnetic field cavity through the corresponding opening, and is composed of an imaging plate and a supporting plate connected with the imaging plate.After the light sensing assemblies are inserted in the magnetic field cavity, a sealed space is formed by the imaging plates, the side wall of the magnetic field cavity and an upper cover of the magnetic field cavity.The electron energy detection range is obviously increased, the size and weight of the instrument are obviously reduced, and the magnetic field uniformity and detection accuracy are obviously improved.

Description

technical field [0001] The invention relates to a test device, in particular to an electron magnetic spectrometer for measuring the thermal electron energy spectrum. Background technique [0002] For the measurement of epithermal electron spectroscopy, electron magnetic spectrometers are generally used at present. The existing electron magnetic spectrometer for measuring epithermal electron spectroscopy has a structure such as figure 1 As shown, it includes a magnetic field cavity and a photosensitive assembly, and the two opposite side walls of the magnetic field cavity are respectively provided with an incident hole part insertion hole 11 and a collimation hole 12, a magnetic field cavity shell 1, a shell upper cover 2, Bottom magnet group 3 and top magnet group 4. The entire magnetic field cavity is in the shape of a cuboid or cube. A window 14 equal in size to the photosensitive component is opened on the side wall where the entrance hole 12 is located to place the phot...

AI Technical Summary

Problems solved by technology

The existing electron magnetic spectrometer for measuring epithermal electron spectroscopy has a structure such as figure 1 As shown, it includes a magnetic field cavity and a photosensitive assembly, and the two opposite side walls of the magnetic field cavity are respectively provided with an incident hole part insertion hole 11 and a collimation hole 12, a magnetic field cavity shell 1, a shell upper cover 2, Bottom magnet group 3 and top magnet group 4. The entire magnetic field cavity is in the shape of a cuboid or cube. A window 14 equal in size to the photosensitive component is opened on the side wall where the entrance hole 12 is located to place the photosensitive component. The photosensitive component includes an imaging plate 5 and the movable block 15 for loading and unloading the imaging plate 5, for a magnetic field cavity with a uniform magnetic field area of ​​135 mm × 90 mm and a magnetic field strength of 10000 Gs, the required size is 240 mm × 230 mm × 115 mm, and the size of the window 14 is 10 mm × 120 mm. The magnetic induction intensity of the internal magnetic field of this kind of equipment is high, and the window 14 will cause serious magnetic flux leakage, which will lead to poor uniformity of the magnetic field inside the magnetic field cavity, which will affect the accuracy of the measurement. In order to ensure the uniformity of the magnetic induction intensity in the center of the magnetic field, It is necessary to increase the wall thickness of the cavity to enhance the magnetic shielding effect, resulting in a substantial increase in the size and weight of the electron magnetic spectrometer. Since the electron magnetic spectrometer used for epithermal electron spectroscopy measurement must be placed together with all other experimental equipment In a large jar (generally referred to as a vacuum target chamber), the vacuum target chamber is evacuated and then the experiment is carried out. The space and load-bearing capacity of the vacuum target chamber are very limited, so the miniaturization and light weight of the electronic magnetic spectrometer is very important. important

Moreover, in order to reduce magnetic flux leakage in the existing electronic magnetic spectrometer, only one window 14 is opened to place the photosensitive component, and its detection range is also very small.

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