A Four-ring Focusing Magnetic Field Device with High Remanence Utilization Efficiency
A technology of focusing magnetic field and utilization rate, applied in the direction of magnets, permanent magnets, magnetic objects, etc., can solve the problems such as the difficulty of realizing strip-shaped electron focusing, and achieve the effects of avoiding magnetic field interference, good magnetic shielding effect, and compact design
Active Publication Date: 2022-04-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is the problem that the existing electron beam concentration scheme is difficult to realize the focusing of the strip-shaped electron beam, and the purpose is to provide a four-ring focusing magnetic field device with high remanence utilization rate to solve the above problems
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[0036] In this embodiment, samarium cobalt magnet is selected as the hard magnetic material, and 10800Gs is selected as the magnetization. The soft magnetic material is pure iron.
[0037] like figure 1 and figure 2 As shown, a four-ring type focusing magnetic field device with high remanence utilization provided by an embodiment of the present invention includes four ring magnets for generating a magnetic field and four soft magnetic structures for magnetic conduction;
[0038] Four ring magnets for generating a magnetic field are respectively the first ring magnet 1, the second ring magnet 6, the third ring magnet 8 and the fourth ring magnet 3; the first ring magnet 1, The central axes of the second ring magnet 6 , the third ring magnet 8 and the fourth ring magnet 3 coincide.
[0039] The four soft magnetic structures used for magnetic conduction are the first soft magnetic structure 2 , the second soft magnetic structure 5 , the third soft magnetic structure 7 and the...
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The invention discloses a four-ring type focusing magnetic field device with high remanence utilization rate, which comprises a plurality of ring magnets for generating a magnetic field and a plurality of soft magnetic structures for magnetic conduction; the plurality of ring magnets for generating a magnetic field The ring magnet and a plurality of soft magnetic structures for magnetic conduction cooperate with each other and are nested along the same axis. The invention has a relatively compact design and can make full use of the remanence in the magnetic block, so that the magnetic field on the middle magnetic circuit is very close to the remanence of the magnetic block; it can effectively focus the strip-shaped electron beam; it has a better magnetic shielding effect , to prevent the magnetic field from interfering with the electron gun; the magnetic field on the middle magnetic circuit is relatively uniform; the distance from zero to uniform field is relatively short.
Description
technical field [0001] The invention relates to the technical field of vacuum electronic devices, in particular to a four-ring focusing magnetic field device with high remanence utilization ratio. Background technique [0002] Ribbon vacuum electronic devices have been widely used in high-resolution radar, high-speed data communication, electronic attack, radio astronomy and other fields. Compared with the traditional circular cylindrical devices, the ribbon injection devices such as the ribbon injection traveling wave tube, the ribbon injection klystron, and the ribbon injection free electron laser have obvious advantages. For example, it has been found that ribbon beam devices can produce higher peak and average power than circular electron beam devices because ribbon beams can carry higher currents than conventional circular beams. In addition, ribbon beams are sufficiently thin And it is closer to the surface of the high-frequency circuit, so it can be well coupled with...
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IPC IPC(8): H01F7/02H01J23/087
CPCH01F7/0278H01J23/087H01J2223/087
Inventor 尹鹏程魏彦玉徐进岳玲娜殷海荣赵国庆王文祥方栓柱杨瑞超罗瑾璟张建贾栋栋
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA