Beam homogenizing sextupole magnet for accelerator

A homogenization and accelerator technology, which is applied in the field of beam homogenization hexapole magnets for accelerators, can solve the problems of poor uniformity and uneven beam current, and achieve the effect of good homogenization effect.

Active Publication Date: 2015-06-03
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

The goal of the homogenization of the non-linear step field dipole magnet is to translate the particles at the edge of the beam to the inner area with equal density, but the beam it translates is not uniform. When the translation is superimposed, it is high density and relatively high density. Overlay, the overlay of low density and lower density, the uniformity of the overlay is still not very good

Method used

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  • Beam homogenizing sextupole magnet for accelerator
  • Beam homogenizing sextupole magnet for accelerator
  • Beam homogenizing sextupole magnet for accelerator

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Embodiment

[0021] The magnetic pole distance of the hexapole magnet provided in this embodiment is as follows: figure 1 As shown in the figure, the distance between the magnetic poles 3 and 6 is the same as the distance between the magnetic poles 4 and 5, which is 5cm. The distance between the magnetic poles 1 and 2 is 1.1cm. The other magnetic poles 3, 4, 5, and 6 are provided with excitation wire packages and the excitation current is supplied. The direction of the magnetic field generated in the opposite poles 3 and 6 of the two sets of excitation wire packs 7 and 10 is opposite to the direction of the magnetic field generated in the opposite poles 4 and 5 of the other two sets of excitation wire packs 8 and 9 . The magnetic fields generated in (or 4, 5) have the same direction, thereby forming a magnetic field distribution that is symmetrical with respect to the center line of the magnet. The initial density distribution of the beam is a Gaussian distribution, such as image 3 show...

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Abstract

The invention belongs to the design technique of accelerators and particularly relates to a beam homogenizing sextupole magnet for an accelerator. On the basis of a traditional design, excitation coils of an opposite pair of magnetic poles are eliminated, distance between the magnetic poles is shortened, and a current direction of coils of a pair of adjacent magnetic poles is changed. The beam homogenizing sextupole magnet has the advantages that a magnetic field generated on an X axis can be symmetric about an origin of a coordinate, the size of the magnetic field is proportional to a square of the position of the magnetic field, and beam spots in similar triangular density distribution can be homogenized effectively.

Description

technical field [0001] The invention belongs to the accelerator design technology, and particularly relates to a beam homogenizing hexapole magnet for accelerators. Background technique [0002] The particle distribution in the transverse cross-section of the beam generated by the accelerator is generally Gaussian, that is, the particle distribution on the target is not uniform. In some industrial electron irradiation applications, the uniformity of beam irradiation is very high, such as the irradiation of semiconductor materials. In addition, when the high power density beam generated by the heavy ion accelerator bombards the target, in order to reduce the size of the target and realize the cooling of the target, it is necessary to shape the beam to be as uniform as possible while expanding the beam spot. Therefore, the homogenization of the accelerator beam is a very important issue. [0003] At present, the beam homogenization devices used at home and abroad are divided...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02
Inventor 李金海任秀艳曾自强
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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