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Undulator

An undulator, superconducting permanent magnet technology, applied in superconducting magnets/coils, radiation/particle processing, magnetic objects, etc., can solve problems such as the inability to provide a large magnetic induction magnetic field, and achieve the effect of improving performance

Inactive Publication Date: 2013-10-02
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect that the magnetic induction intensity of the magnetic field provided by the undulator in the prior art is limited by the performance of the normal temperature rare earth permanent magnet material and cannot provide a magnetic field with a greater magnetic induction intensity, and proposes an undulator By using superconducting permanent magnets, the magnetic field of rare earth permanent magnets and superconducting permanent magnets are superimposed to generate a magnetic field with greater magnetic induction intensity

Method used

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  • Undulator

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Embodiment 1

[0020] Such as figure 1 As shown, the undulator of this embodiment includes several permanent magnet groups 1 arranged in sequence along the direction of an electron beam transmission path 2, and each permanent magnet group 1 includes two groups of superconducting permanent magnets 11 and two groups of rare earth permanent magnets 12 , figure 1 A permanent magnet group 1 is exemplarily shown in a dotted box in . The two sets of superconducting permanent magnets 11 and the two sets of rare earth permanent magnets 12 are respectively arranged on both sides of the electron beam transmission path 2, those skilled in the art should understand that, figure 1 The electron beam transmission path 2 includes a straight line and a curved line, the straight line only indicates the direction of electron beam transmission, and the curve schematically shows the actual transmission path of the electron beam in the undulator, and figure 1 Only the electron beam transmission path 2 inside the...

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Abstract

The invention discloses an undulator which comprises a plurality of permanent magnet groups arranged sequentially, wherein each permanent magnet group comprises two groups of superconductive permanent magnets and two groups of rare-earth permanent magnets; the superconductive permanent magnets and the rare-earth permanent magnets are arranged on the two sides of a transmission path of an electron beam respectively; magnetic poles of the superconductive permanent magnets are opposite in direction; magnetic fields generated by the rare-earth permanent magnets strengthen magnetic fields generated by the superconductive permanent magnets on the transmission path of the electron beam; the temperature of the superconductive permanent magnets is lower than the superconductive critical temperature of the superconductive permanent magnets; and the magnetic induction intensity of magnetic fields generated by the permanent magnet groups on the transmission path of the electron beam has periodic variation in a direction of the transmission path of the electron beam. According to the undulator, a magnetic field with higher magnetic induction intensity is generated by the superconductive permanent magnets and the rare-earth permanent magnets in a magnetic field superposition manner, so that the performance of the undulator is improved.

Description

technical field [0001] The invention relates to an undulator. Background technique [0002] An undulator is an element that generates a periodic magnetic field, and is the core component of a synchrotron radiation device and a free electron laser device. In synchrotron radiation devices and free electron laser devices, electron beams are required to generate high-intensity and high-brightness X-rays when they pass through an undulator, so very high requirements are placed on the magnetic induction of the undulator. [0003] The existing undulator is a room temperature rare earth permanent magnet undulator, its main limitation lies in the limit of the maximum remanent magnetic field of the room temperature rare earth permanent magnet material itself, and the magnetic induction intensity has reached the limit. The maximum magnetic induction intensity of the magnetic field generated by the rare earth permanent magnet at room temperature is 2.2 Tesla, while the superconducting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F6/06G21K1/00
Inventor 张正臣许皆平李炜崔剑李明江勇
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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