Electronic beam collecting device for electronic gun

An electron gun and electron beam technology, applied in the field of electromagnetic fields, can solve the problems of low accuracy, low controllability of electron beam current, and inability to collect electrons, and achieve the effects of easy adjustment and improved accuracy

Inactive Publication Date: 2014-08-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of low controllability and low accuracy of the electron beam current of the existing electron gun, which leads to the problem that the electrons cannot be converged and diverge, thereby providing an electron beam converging device for the electron gun

Method used

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  • Electronic beam collecting device for electronic gun

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specific Embodiment approach 1

[0008] Specific implementation mode one: the following combination figure 1 Illustrate the present embodiment, the electronic beam converging device for electron gun described in the present embodiment, it comprises coil 2 and power supply device, and one end of coil 2 is fixed on the electron gun ejection port 1 by pasting mode, and the other end of coil 2 is free terminal; the power supply device is used to provide power for the coil 2.

[0009] In this embodiment, a solenoid wound by a copper wire is attached to the muzzle of the electron gun. The length of the solenoid is adjustable within a certain range. The adjustment method is to wrap more wires into the solenoid tube, or unwrap the wire that has been entangled in the solenoid. Connect the two ends of the coil, and pass a certain current to the coil according to the requirements of the actual experiment, so as to form a magnetic field in the solenoid and bind the electron bundle to be bound in the solenoid.

[0010] ...

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment further limits the electron beam converging device for an electron gun described in Embodiment 1. In this embodiment, it also includes an electron collection device 3, and the electron collection device 3 is used to collect The electron gun emits the electrons emitted from outlet 1.

specific Embodiment approach 3

[0012] Specific embodiment three: This embodiment further limits the electron beam converging device for the electron gun described in specific embodiment one. In this embodiment, the diameter of the electron gun outlet 1 is 10 -4 m.

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Abstract

The invention discloses an electronic beam collecting device for an electronic gun and relates to the field of electromagnetic fields. The electronic beam collecting device for the electronic gun is used for solving the problem that as electronic beams of an existing electronic gun are low in controllability and accuracy, the electronic beams cannot be collected and are scattered. By means of the electronic beam collecting device for the electronic gun, the emitting point of electronic beams emitted out by the electronic gun can be freely adjusted, and the magnetic field strength can be changed by adjusting exciting current; meanwhile, as the shape and length of a coil can also be easily adjusted, a radial magnetic field is generated according to a magnet exciting coil method, motion of electric charges is controlled by Lorentz force of the magnetic field, then the purpose of controlling the emitting point of the electronic beams is achieved, and the accuracy is improved by 20% on year-on-year basis. The electronic beam collecting device for the electronic gun is applicable to the field of electromagnetic fields.

Description

technical field [0001] The present invention relates to the field of electromagnetic fields. Background technique [0002] A magnetic field is a special substance that has a magnetic force on a magnet placed in it. Its basic feature is that it can exert a force on moving charges, that is, a current-carrying conductor or a moving charged particle can be subjected to the force of a magnetic field in a magnetic field. The acting force is called the Lorentz force, and its magnitude and direction are given by the formula Determines the Lorentz force on charged particles. [0003] Electron beams are widely used in experiments related to electromagnetic fields. The electron gun is currently the most commonly used electron beam generating device. However, because the electrons are negatively charged, the electric field force between the electrons will cause the electrons to repel each other, and eventually they will not be able to converge and diverge, which will affect the expe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J3/02H01J3/10
Inventor 江滨浩李传雨
Owner HARBIN INST OF TECH
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