Uniform transverse beam profile with a new type of nonlinear magnet

Sheng-Dong Gu; Wei-Bin Liu

doi:10.1088/1674-1137/41/6/067003

Chinese Physics C> 2017, Vol. 41> Issue(6) : 067003 DOI: 10.1088/1674-1137/41/6/067003

Uniform transverse beam profile with a new type of nonlinear magnet

Sheng-Dong Gu ^, ,
Wei-Bin Liu

1.
Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 19(B) Yuquan Road, Beijing 100049, China

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Abstract：
In this paper, a new type of magnet is proposed and produced to give a uniform transverse beam profile. Compared to octupole magnets, the new type of magnet can provide a similar octupole magnet field in the middle, but the rise rate declines quickly at the edges, so that a beam of the same uniformity is obtained with less particle loss. Besides that, a mechanical structure is added to adjust the width of the middle region to satisfy different transverse dimensions, which would further reduce particle loss. Some numerical simulations have been done with the octupole and the new type of magnet to show the advantages of the new magnet.
- uniform beam ,
- nonlinear magnet ,
- beam dynamics ,
- simulation ,
- octupole

References

[1]	Y. Yuri, N. Miyawaki, T. Kamiya et al., Physical Review Special Topics-Accelerators and Beams, 10(10): 104001 (2007)
[2]	Y. K. Batygin. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 79(1): 770-772 (1993)
[3]	F. Meot and T. Aniel, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 379(2): 196-205 (1996)
[4]	P. F. Meads Jr, A Nonlinear Lens System to Smooth the Intensity Distribution of a Gaussian Beam (7053 Shirley Dr., Oakland, CA 94611, 1983)

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Sheng-Dong Gu and Wei-Bin Liu. Uniform transverse beam profile with a new type of nonlinear magnet[J]. Chinese Physics C, 2017, 41(6): 067003. doi: 10.1088/1674-1137/41/6/067003

Sheng-Dong Gu and Wei-Bin Liu. Uniform transverse beam profile with a new type of nonlinear magnet[J]. Chinese Physics C, 2017, 41(6): 067003. doi: 10.1088/1674-1137/41/6/067003 shu

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Received: 2016-07-21
Revised: 2017-02-04

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Supported supported by National Natural Science Foundation of China (11175195)}

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Uniform transverse beam profile with a new type of nonlinear magnet

Sheng-Dong Gu ^,
Wei-Bin Liu

Corresponding author: Sheng-Dong Gu,

1. Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 19(B) Yuquan Road, Beijing 100049, China

Received Date: 2016-07-21
Accepted Date: 2017-02-04
Available Online: 2017-06-05

Fund Project: Supported supported by National Natural Science Foundation of China (11175195)}

Abstract: In this paper, a new type of magnet is proposed and produced to give a uniform transverse beam profile. Compared to octupole magnets, the new type of magnet can provide a similar octupole magnet field in the middle, but the rise rate declines quickly at the edges, so that a beam of the same uniformity is obtained with less particle loss. Besides that, a mechanical structure is added to adjust the width of the middle region to satisfy different transverse dimensions, which would further reduce particle loss. Some numerical simulations have been done with the octupole and the new type of magnet to show the advantages of the new magnet.