HIAT2018 - List of Authors (Yuan, Y.J.)

Paper	Title	Page
MOZBA01	Present Status of HIRFL Complex in Lanzhou	18
	Y.J. Yuan, D.Q. Gao, L.Z. Ma, L.J. Mao, R.S. Mao, J. Meng, Y.W. Su, L.T. Sun, Y.Y. Wang, J.X. Wu, J.W. Xia, G.Q. Xiao, Z. Xu, J.C. Yang, W.Q. Yang, Q.G. Yao, X. Yin, B. Zhang, W. Zhang, H.W. Zhao, Z.Z. Zhou IMP/CAS, Lanzhou, People’s Republic of China
	Heavy Ion Research Facility in Lanzhou (HIRFL) is a cyclotron, synchrotron and storage ring accelerator complex, which accelerates ions of hydrogen to uranium from low to medium energy. Since the complete of HIRFL-CSR project in 2008, under the support from CAS, efforts have been put to improve the infrastructure for machine performance, including improvement of EMC environments, power distribution stations, PS stations, cooling water system, RF system of cyclotrons and adoption of EPICS control system, etc. New generation SC ECR source-SECRAL2 with high performance is put into operation. Experiments of electron cooling with pulsed electron beam are performed for the 1st time. Stochastic cooling and laser cooling are realized in CSRe. The performance of RIBLL2 and CSRe are gradu-ally improved. The ISO mode of CSRe for precise atomic mass measurements is well studied and reaches state-of-art mass resolution of storage rings. The operation status and enhancement plan of HIRFL will be briefly reported in this paper.
	Slides MOZBA01 [37.124 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-MOZBA01
About •	paper received ※ 20 October 2018 paper accepted ※ 23 October 2018 issue date ※ 05 November 2019
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MOPB15	Development of a Pepper Pot Probe to Measure the Four-Dimensional Emittance of Low Energy Beam of Electron Cyclotron Resonance Ion Source at IMP	57
	X. Fang, Y. Cao, R.F. Chen, X.X. Li, W. Lu, B.H. Ma, C. Qian, L.T. Sun, H. Wang, J.X. Wu, Y. Yang, Y.J. Yuan, X.Z. Zhang, H.W. Zhao IMP/CAS, Lanzhou, People’s Republic of China
	The ion beams extracted from an Electron Cyclotron Resonance (ECR) ion source always exist strong transverse coupling effect that is caused by the field of the axis mirror magnets and the extraction solenoid. A Pepper Pot probe was developed and used to obtain the full four-dimensional phase space distribution of the low energy beam extracted from the ECR ion source at IMP. This paper describes the design of the Pepper Pot, the setup configuration, the detailed image processing procedure, especially the analysis results verification compared to another type emittance meter. The first four-dimensional emittance is also determined through the Pepper Pot probe. The transverse phase space distribution measurement data of oxygen beams from the LECR4 experimental platform are presented and discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-MOPB15
About •	paper received ※ 21 October 2018 paper accepted ※ 26 October 2018 issue date ※ 05 November 2019
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WEOAA03	Stochastic Cooling Simulation of Rare Isotope Beam and its Secondary Beam	107
	X.J. Hu, Z. Du, L. Jing, Y. Wei, J.X. Wu, Y.J. Yuan, G. Zhu IMP/CAS, Lanzhou, People’s Republic of China
	Stochastic cooling is a broadband feedback system, which is very effective for reducing the beam size without beam loss. It has advantage over electron cooling in cooling low intensity beam with large emittance and mo-mentum spread, which is required for precise study of the decay properties of RIB (Radioactive Ion Beam) using SMS method. This paper mainly concerns on cooling of primary beam and its secondary beam, pointing out the range of mass-to-charge spread that could be cooled for secondary particles. Meanwhile, TOF cooling combined with filter cooling was also studied. The simulation results provide theoretical supports for analysing different ions circulating in the ring at the same time in the experiments.
	Slides WEOAA03 [2.093 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEOAA03
About •	paper received ※ 19 October 2018 paper accepted ※ 14 November 2019 issue date ※ 05 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPB03	Multi-physics Analysis of a CW Four-rod RFQ	138
	Z.S. Li, Y. Cong, H. Du, Y. He, L. Jing, Q.Y. Kong, X.N. Li, J. Meng, G.D. Shen, H.N. Wang, K.D. Wang, Z.J. Wang, Y. Wei, J.X. Wu, J.W. Xia, H.M. Xie, W.J. Xie, X.W. Xu, Z. Xu, J.C. Yang, Y.Q. Yang, X. Yin, Y.J. Yuan, Y. Zhang IMP/CAS, Lanzhou, People’s Republic of China Y.R. Lu, K. Zhu PKU, Beijing, People’s Republic of China
	The new injector SSC-LINAC is under design and con-struction to improve the efficiency and intensity of beams for the Separated-Sector Cyclotron (SSC). This will be accomplished with a normal conducting radio-frequency quadrupole (RFQ) accelerator. To match with the SSC, the RFQ must be operated on Continuous Wave (CW) mode with a frequency of 53.667 MHz. A four-rod structure was adopted for small dimensions of the cavity. While, it was a huge challenge on CW mode. A multi-physics theoretical analysis, including RF, thermal, struc-tural and frequency shift coupling analysis, have been completed in response to the security and stable opera-tion of the RFQ. The experimental measurement of fre-quency shift was also completed, which is consistent with the simulation. In this paper, the results of theoretical analysis and experiment are reported in detail.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB03
About •	paper received ※ 09 November 2018 paper accepted ※ 14 November 2019 issue date ※ 05 November 2019
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WEPB08	Dynamics Study of a Drift Tube Linac for Both Heavy Ions and Proton	148
	H. Du, Q.Y. Kong, X.N. Li, Z.S. Li, K.D. Wang, J.W. Xia, J.C. Yang, X. Yin, Y.J. Yuan IMP/CAS, Lanzhou, People’s Republic of China
	Funding: Work supported by National Natural Science Foundation of China (11375243, 11405237) and Guangdong Innovative and Entrepreneurial Research Team Program (2016ZT06G373). An accelerator complex for Space Environment Simu-lation and Research Infrastructure (SESRI) has been designed by Institute of Modern Physics (IMP) and will be constructed in Harbin Institute of Technology (HIT). This accelerator consists of an ECR ion source, a linac injector, a synchrotron and 3 research terminals. As an important part of the complex, the linac injector should provide both proton and different kinds of heavy ions, from helium to bismuth, with energy of 5 MeV and 1 MeV/u respectively for the synchrotron. In order to provide beams with the mass to charge ratio (A/Q) range from 1 ’ 6.5(for proton to 209Bi³²⁺) by only one linac injector, a special solution of the main acceleration section DTL is carried out. The relevant dynamics calculations, such as beam matching, stripping process of the hydrogen molecule ion and beam energy spread reducing, are performed by Particle in Cell (PIC) method.
	Poster WEPB08 [2.541 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB08
About •	paper received ※ 19 October 2018 paper accepted ※ 23 October 2018 issue date ※ 05 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Present Status of HIRFL Complex in Lanzhou

18

Y.J. Yuan, D.Q. Gao, L.Z. Ma, L.J. Mao, R.S. Mao, J. Meng, Y.W. Su, L.T. Sun, Y.Y. Wang, J.X. Wu, J.W. Xia, G.Q. Xiao, Z. Xu, J.C. Yang, W.Q. Yang, Q.G. Yao, X. Yin, B. Zhang, W. Zhang, H.W. Zhao, Z.Z. Zhou
IMP/CAS, Lanzhou, People’s Republic of China

Heavy Ion Research Facility in Lanzhou (HIRFL) is a cyclotron, synchrotron and storage ring accelerator complex, which accelerates ions of hydrogen to uranium from low to medium energy. Since the complete of HIRFL-CSR project in 2008, under the support from CAS, efforts have been put to improve the infrastructure for machine performance, including improvement of EMC environments, power distribution stations, PS stations, cooling water system, RF system of cyclotrons and adoption of EPICS control system, etc. New generation SC ECR source-SECRAL2 with high performance is put into operation. Experiments of electron cooling with pulsed electron beam are performed for the 1st time. Stochastic cooling and laser cooling are realized in CSRe. The performance of RIBLL2 and CSRe are gradu-ally improved. The ISO mode of CSRe for precise atomic mass measurements is well studied and reaches state-of-art mass resolution of storage rings. The operation status and enhancement plan of HIRFL will be briefly reported in this paper.

Slides MOZBA01 [37.124 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-MOZBA01

About •

paper received ※ 20 October 2018 paper accepted ※ 23 October 2018 issue date ※ 05 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPB15

Development of a Pepper Pot Probe to Measure the Four-Dimensional Emittance of Low Energy Beam of Electron Cyclotron Resonance Ion Source at IMP

57

X. Fang, Y. Cao, R.F. Chen, X.X. Li, W. Lu, B.H. Ma, C. Qian, L.T. Sun, H. Wang, J.X. Wu, Y. Yang, Y.J. Yuan, X.Z. Zhang, H.W. Zhao
IMP/CAS, Lanzhou, People’s Republic of China

The ion beams extracted from an Electron Cyclotron Resonance (ECR) ion source always exist strong transverse coupling effect that is caused by the field of the axis mirror magnets and the extraction solenoid. A Pepper Pot probe was developed and used to obtain the full four-dimensional phase space distribution of the low energy beam extracted from the ECR ion source at IMP. This paper describes the design of the Pepper Pot, the setup configuration, the detailed image processing procedure, especially the analysis results verification compared to another type emittance meter. The first four-dimensional emittance is also determined through the Pepper Pot probe. The transverse phase space distribution measurement data of oxygen beams from the LECR4 experimental platform are presented and discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-MOPB15

About •

paper received ※ 21 October 2018 paper accepted ※ 26 October 2018 issue date ※ 05 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEOAA03

Stochastic Cooling Simulation of Rare Isotope Beam and its Secondary Beam

107

X.J. Hu, Z. Du, L. Jing, Y. Wei, J.X. Wu, Y.J. Yuan, G. Zhu
IMP/CAS, Lanzhou, People’s Republic of China

Stochastic cooling is a broadband feedback system, which is very effective for reducing the beam size without beam loss. It has advantage over electron cooling in cooling low intensity beam with large emittance and mo-mentum spread, which is required for precise study of the decay properties of RIB (Radioactive Ion Beam) using SMS method. This paper mainly concerns on cooling of primary beam and its secondary beam, pointing out the range of mass-to-charge spread that could be cooled for secondary particles. Meanwhile, TOF cooling combined with filter cooling was also studied. The simulation results provide theoretical supports for analysing different ions circulating in the ring at the same time in the experiments.

Slides WEOAA03 [2.093 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEOAA03

About •

paper received ※ 19 October 2018 paper accepted ※ 14 November 2019 issue date ※ 05 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPB03

Multi-physics Analysis of a CW Four-rod RFQ

138

Z.S. Li, Y. Cong, H. Du, Y. He, L. Jing, Q.Y. Kong, X.N. Li, J. Meng, G.D. Shen, H.N. Wang, K.D. Wang, Z.J. Wang, Y. Wei, J.X. Wu, J.W. Xia, H.M. Xie, W.J. Xie, X.W. Xu, Z. Xu, J.C. Yang, Y.Q. Yang, X. Yin, Y.J. Yuan, Y. Zhang
IMP/CAS, Lanzhou, People’s Republic of China
Y.R. Lu, K. Zhu
PKU, Beijing, People’s Republic of China

The new injector SSC-LINAC is under design and con-struction to improve the efficiency and intensity of beams for the Separated-Sector Cyclotron (SSC). This will be accomplished with a normal conducting radio-frequency quadrupole (RFQ) accelerator. To match with the SSC, the RFQ must be operated on Continuous Wave (CW) mode with a frequency of 53.667 MHz. A four-rod structure was adopted for small dimensions of the cavity. While, it was a huge challenge on CW mode. A multi-physics theoretical analysis, including RF, thermal, struc-tural and frequency shift coupling analysis, have been completed in response to the security and stable opera-tion of the RFQ. The experimental measurement of fre-quency shift was also completed, which is consistent with the simulation. In this paper, the results of theoretical analysis and experiment are reported in detail.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB03

About •

paper received ※ 09 November 2018 paper accepted ※ 14 November 2019 issue date ※ 05 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPB08

Dynamics Study of a Drift Tube Linac for Both Heavy Ions and Proton

148

H. Du, Q.Y. Kong, X.N. Li, Z.S. Li, K.D. Wang, J.W. Xia, J.C. Yang, X. Yin, Y.J. Yuan
IMP/CAS, Lanzhou, People’s Republic of China

Funding: Work supported by National Natural Science Foundation of China (11375243, 11405237) and Guangdong Innovative and Entrepreneurial Research Team Program (2016ZT06G373).
An accelerator complex for Space Environment Simu-lation and Research Infrastructure (SESRI) has been designed by Institute of Modern Physics (IMP) and will be constructed in Harbin Institute of Technology (HIT). This accelerator consists of an ECR ion source, a linac injector, a synchrotron and 3 research terminals. As an important part of the complex, the linac injector should provide both proton and different kinds of heavy ions, from helium to bismuth, with energy of 5 MeV and 1 MeV/u respectively for the synchrotron. In order to provide beams with the mass to charge ratio (A/Q) range from 1 ’ 6.5(for proton to 209Bi³²⁺) by only one linac injector, a special solution of the main acceleration section DTL is carried out. The relevant dynamics calculations, such as beam matching, stripping process of the hydrogen molecule ion and beam energy spread reducing, are performed by Particle in Cell (PIC) method.

Poster WEPB08 [2.541 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB08

About •

paper received ※ 19 October 2018 paper accepted ※ 23 October 2018 issue date ※ 05 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)