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Constant magnetic field structure

A technology of magnetic field and structural parts, applied in the direction of magnets, magnetic objects, permanent magnets, etc., can solve the problems that periodic permanent magnets cannot be used for focusing and are not suitable

Active Publication Date: 2020-08-25
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the ribbon electron beam is not axisymmetric, periodic permanent magnet focusing cannot be used, and the periodic permanent magnet focusing system is not suitable for focusing the ribbon electron beam.

Method used

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Embodiment Construction

[0025] The specific embodiment of the present invention will be described in further detail by describing the embodiments below with reference to the accompanying drawings, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and contribute to its implementation.

[0026] It should be noted that in the following embodiments, the "first" and "second" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are only for Easy to describe.

[0027] In the present invention, in the absence of a contrary description, the orientation words included in the term, such as "inside and outside", only represent the orientation of the term in the normal use state, or the common name understood by those skilled in the art, and should not be viewed as a limitation of this term.

[0028] Such as Figure 1 to...

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Abstract

The invention discloses a constant magnetic field structure which is characterized by comprising a first magnet and a second magnet oppositely arranged. A distance is reserved between the first magnetand the second magnet, and a constant magnetic field area for containing a workpiece is formed between the first magnet and the second magnet. The constant magnetic field structure can effectively focus strip-shaped electron beams such as a traveling wave tube, a klystron and a backward wave tube, and can also focus cylindrical electron beams and the like.

Description

technical field [0001] The invention belongs to the technical field of vacuum devices, in particular, the invention relates to a constant magnetic field structure. Background technique [0002] In the microwave field, traveling wave tubes, klystrons, and return wave tube devices are widely used microwave devices for radar, electronic countermeasures, communications and other fields. Traveling wave tubes, klystrons, and return wave tube devices are microwave vacuum devices, which use electron beams and electromagnetic fields to interact in vacuum to generate electromagnetic wave oscillation or amplification. During the interaction between the electron beam and the electromagnetic field, the electron beam needs to maintain its shape and remain unchanged. Because the electrons in the electron beam are negatively charged and repel each other, the electron beam diverges and cannot maintain its shape. At this time, it is necessary to use an axial magnetic field to compress the tr...

Claims

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Application Information

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IPC IPC(8): H01F7/02H01J23/087
CPCH01F7/0278H01J23/087
Inventor 沈旭东赵艳珩王鹏康
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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