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Positron-electron magnetic spectrometer with angular resolution capability

An angle-resolving, magnetic spectrometer technology, applied in instruments, scientific instruments, radiation measurement, etc., can solve the problem of low measurement accuracy and achieve the effects of high measurement accuracy, reasonable structure, and ingenious design

Active Publication Date: 2016-03-23
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

The farther the distance is, the fewer particles enter the magnetic spectrometer, and the lower the measurement accuracy

Method used

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  • Positron-electron magnetic spectrometer with angular resolution capability
  • Positron-electron magnetic spectrometer with angular resolution capability
  • Positron-electron magnetic spectrometer with angular resolution capability

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Embodiment

[0037] Such as figure 1 As shown, the present invention provides a magnetic spectrometer, which includes a collimation hole array 1 , a cylindrical magnet device and a positron-electron recording medium 5 . The collimation hole array 1 is used to pass through the positive and negative electrons generated from the target point. In this embodiment, the collimation hole array 1 is composed of nine vertically arranged collimation holes, and is close to the cylindrical shape. On one side of the magnet device (entrance), the center coordinates of the nine collimation holes are: 0mm, ±10.5mm, ±21.2mm, ±32.2mm, ±43.7mm, and the corresponding divergence angles are 0, ±5.625°, ±11.25°, ±16.875°, ±22.5°, the diameter of each collimation hole is 4mm. After the positrons and electrons pass through the collimation hole array 1, only the positrons and electrons in certain directions enter the cylindrical magnet device.

[0038] The cylindrical magnet device is used to generate a magnetic f...

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Abstract

The invention discloses a positron-electron magnetic spectrometer with the angular resolution capability. The positron-electron magnetic spectrometer comprises an alignment hole array, a cylindrical magnet device and a positron-electron recording medium, wherein the alignment hole array is used for leading positrons and electrons into the cylindrical magnet device; the cylindrical magnet device comprises an outer shell, an inner shell and permanent magnets, the permanent magnets are fixed between the outer shell and the inner shell and are radially distributed; a magnetic field loop in which the movement directions of the positrons and the electrons are deflected is formed by space enclosed by all of the permanent magnets; the positron-electron recording medium is used for recording the intensity distribution of the positrons and the electrons on an imaging plane, so as to obtain the angular distribution of the positrons and the electrons and the information of an energy spectrum of the angular distribution. The positron-electron magnetic spectrometer has the advantages of reasonable structure and skillful design, the technical defects of low measurement precision and long time for adjusting a measurement range of an existing magnetic spectrometer are preferably overcome, and the diagnosis precision of an energy spectrum of the angular distribution of the positrons and the electrons is greatly increased, and therefore, the positron-electron magnetic spectrometer is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of particle detection, in particular to a positron-electron magnetic spectrometer with angular resolution capability. Background technique [0002] American physicist Anderson discovered the existence of positrons in 1932 using the Wilson cloud chamber. Positrons are the first antimatter discovered by humans. The number of positrons produced by the Milky Way every second is about 1.5*10 43 , which is equivalent to the total number of electrons in Chaohu Lake water. Therefore, positrons play an important role in laboratory astrophysics and high-energy physics research. In addition, the physical phenomenon based on the annihilation of positron-electrons to generate high-energy gamma rays has also been widely used in non-destructive detection of material defects and technologies such as positron emission tomography (PET). [0003] Positrons can be generated by using ultra-short and ultra-intense laser light to intera...

Claims

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Application Information

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IPC IPC(8): G01T1/36G01T1/29
CPCG01T1/2914G01T1/36
Inventor 吴玉迟韩丹陈佳于明海张天奎王少义董克攻朱斌谭放闫永宏谷渝秋
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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