Transverse Twiss parameter measurement with space charge in CADS Injector Ⅰ

Zhao Yaliang; Yan Fang; Geng Huiping; Meng Cai

doi:10.11884/HPLPB201830.170261

Volume 30 Issue 1

Jan. 2018

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Article Navigation > High Power Laser and Particle Beams > 2018 > 30(1): 015101

Zhang Yang, Wang Xianghui, Zhang Jie, et al. Comparison of two discontinuous spectral element methods[J]. High Power Laser and Particle Beams, 2018, 30: 023004. doi: 10.11884/HPLPB201830.170169

Citation:

Zhao Yaliang, Yan Fang, Geng Huiping, et al. Transverse Twiss parameter measurement with space charge in CADS Injector Ⅰ[J]. High Power Laser and Particle Beams, 2018, 30: 015101. doi: 10.11884/HPLPB201830.170261

Zhang Yang, Wang Xianghui, Zhang Jie, et al. Comparison of two discontinuous spectral element methods[J]. High Power Laser and Particle Beams, 2018, 30: 023004. doi: 10.11884/HPLPB201830.170169

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Transverse Twiss parameter measurement with space charge in CADS Injector Ⅰ

doi: 10.11884/HPLPB201830.170261

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Funds:

973 Program 2014CB845500

National Science Foundation of China 11405190

More Information

Author Bio:
Zhao Yaliang(1984-), female, doctor, research assistant, studies accelerator physics; zhaoyl@ihep.ac.cn
Received Date: 2017-06-22
Rev Recd Date: 2017-08-25
Publish Date: 2018-01-15

Abstract

Abstract

The test stand of CADS Injector Ⅰ is built at the Institute of High Energy Physics(IHEP). The 3.2 MeV, 10 mA beam from the RFQ will be transported and matched by medium energy transport line (MEBT1) to the superconductive accelerating section. To minimize the beam loss from mismatch, the Twiss parameters at the exit of RFQ should be got. The method of scanning quadrupole strength with wire scanner is used in CADS Injector Ⅰ. As to the data process, the traditional method based on matrix will bring errors for high intensity accelerators, especially at low energy when the space charge force is very strong. This paper introduces the traditional method and the new method considering space charge effect, which is based on MOGA. The result proves that the space charge should be considered when calculating the Twiss parameters for high intensity low energy accelerators.
- wire scanner,
- space charge,
- MOGA,
- high-intensity accelerator

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References(4)

References

[1]	Yan F, Geng H, Meng C, et al. Commissioning of the China-ADS Injector-I testing facility[C]//Proceedings of IPAC. 2016: 2048-2051.
[2]	Wikipedia. Multi-objective optimization[DB/OL]. https://en.wikipedia.org/wiki/Multi-objective_optimization.
[3]	Uriot D, Pichoff N, Trace Win. CEA Saclay/DSM/Irfu/SACM/LEDA[K]. 2015.
[4]	Geng H, Pei S, Wang H, el al. Emittance measurement with wire scanners at CADS MEBT1[C]//Proceedings of IPAC. 2014: 3575-3577.

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