HIAT2018 - List of Authors (He, Y.)

Paper	Title	Page
MOZAA01	The Design and Experiment of Cw High Current Deuteron RFQ
	K. Zhu, Q. Fu, P.P. Gan, S.L. Gao, H.P. Li, S. Liu, Y.R. Lu, Q.Y. Tan, Z. Wang PKU, Beijing, People’s Republic of China W.P. Dou, Y. He, C. Wang, Z.J. Wang, Q. Wu IMP/CAS, Lanzhou, People’s Republic of China
	Funding: work supported by NSFC. Grand No. 2014CB845503 A window-type RFQ is designed and fabricated by Peking University for the key technique research of Beijing Isotope-Separation-On-Line neutron-rich beam facility(BISOL) . It is planed to accelerate 50mA deuteron CW beam to 1MeV. The 60kV intervene voltage is designed to decrease the risk of high voltage discharge since the RFQ works in CW mode. High power test shows that the intervane voltage is over 60kV when the cavity power consumption is 48kW. The beam experiment was done and 1.8mA CW beam was obtained at the exit of RFQ with over 90% transmission efficiency. It is the first time that window-type RFQ is used to accelerate light ion with high frequency(>100MHz). The experiment result shows that the window-type structure have great advantages in CW working mode.
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WEYAA01	Commissioning of China ADS Demo Linac and Baseline Design of CiADS Project	112
	S.H. Liu, W.L. Chen, W.P. Dou, Y. He, H. Jia, Y.S. Qin, Z.J. Wang, H.W. Zhao IMP/CAS, Lanzhou, People’s Republic of China
	China Accelerator Driven Subcritical System (C-ADS) program was launched in China in 2011, which aims to design and build an ADS demonstration facility with the capability of more than 10 MW thermal power in multiple phases lasting about 20 years. In the first phase, a demo linac has been constructed and commissioned successfully to demonstrate the key technologies of the high-power CW mode superconducting linac. Followed the China ADS roadmap, a superconducting driver linac with 500MeV and 5mA proton beam is designed for the second phase of China Initiative Accelerator Driven Subcritical System (CiADS) program. The commissioning results of the China ADS 25 MeV demo linac and the RAMI oriented beam physics design of CiADS linac are presented in this paper.
	Slides WEYAA01 [17.291 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEYAA01
About •	paper received ※ 25 October 2018 paper accepted ※ 14 November 2019 issue date ※ 05 November 2019
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WEOYA03	Design and Beam Commissioning of the LEAF-RFQ	135
	L. Lu, Y. He, H. Jia, W. Ma, L.B. Shi, L.T. Sun, L.P. Sun, Y. Yang, Y.H. Zhai, H.W. Zhao IMP/CAS, Lanzhou, People’s Republic of China
	An 81.25 MHz continuous wave (CW) radio frequency quadrupole (RFQ) accelerator has been developed and fabricated for the Low Energy Accelerator Facility (LEAF) by the Institute of Modern Physics (IMP) of the Chinese Academy of Science (CAS). The operation frequency is 81.25 MHz and the inter-vane voltage is a constant of 70 kV. It took about 44 hours continuous conditioning to reach RF power of 75 kW which is 1.1 time of the maximum designed operation power, and the CW operation of He⁺ beam and N₂+ beam had successfully accelerated to the designed energy of 0.5 MeV/u. Both the results of the high power test and the beam test will be presented in this paper.
	Slides WEOYA03 [10.750 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEOYA03
About •	paper received ※ 20 October 2018 paper accepted ※ 23 October 2018 issue date ※ 05 November 2019
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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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WEPB06	Nb Sputtered 325 MHz QWR Cavities for CiADS	145
	F. Pan, H. Guo, Y. He, T.C. Jiang, T. Tan, P.R. Xiong, C. Zhang IMP/CAS, Lanzhou, People’s Republic of China Z.X. Li, H.N. Wang MMRC, Fukui-ken, Japan
	CIADS is considering to use quarter wave resonators (QWRs), made by niobium thin film sputtered on copper bases, at its low energy section. Comparing with bulk niobium cavities, the Nb/Cu cavities feature a much better thermal and mechanical stability at 4.5 K. A 325 MHz QWR cavity has been fabricated at IMP, to demostrate the niobium coated copper cavity technique can meet the requirements of CIADS. The cavity is coated with biased DC diode sputtering technique. This paper covers resulting film characters, vertical tests with the evolution of the sputtering process, and improvements to mitigate issues we meet.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB06
About •	paper received ※ 01 November 2018 paper accepted ※ 11 December 2018 issue date ※ 05 November 2019
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WEPB13	A New RF Structure: Bent-Vane Type RFQ	158
	L. Yang, T. He, Y. He, Y. He, L. Lu, C.C. Xing IMP/CAS, Lanzhou, People’s Republic of China
	A new cavity structure of RFQ accelerator with bent vanes is proposed to meet the miniaturization requirement of low frequency accelerators. The new structure has a downsized cross section by bending vanes while keeping a certain vane lengths. It also possesses the advantages of simple cooling structure in low frequency field. The new structure has obvious advantages in reducing manufacturing difficulty of cavity, cutting down project cost, enhancing facility reliability and stability.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB13
About •	paper received ※ 21 October 2018 paper accepted ※ 24 October 2018 issue date ※ 05 November 2019
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Paper

Title

Page

MOZAA01

The Design and Experiment of Cw High Current Deuteron RFQ

K. Zhu, Q. Fu, P.P. Gan, S.L. Gao, H.P. Li, S. Liu, Y.R. Lu, Q.Y. Tan, Z. Wang
PKU, Beijing, People’s Republic of China
W.P. Dou, Y. He, C. Wang, Z.J. Wang, Q. Wu
IMP/CAS, Lanzhou, People’s Republic of China

Funding: work supported by NSFC. Grand No. 2014CB845503
A window-type RFQ is designed and fabricated by Peking University for the key technique research of Beijing Isotope-Separation-On-Line neutron-rich beam facility(BISOL) . It is planed to accelerate 50mA deuteron CW beam to 1MeV. The 60kV intervene voltage is designed to decrease the risk of high voltage discharge since the RFQ works in CW mode. High power test shows that the intervane voltage is over 60kV when the cavity power consumption is 48kW. The beam experiment was done and 1.8mA CW beam was obtained at the exit of RFQ with over 90% transmission efficiency. It is the first time that window-type RFQ is used to accelerate light ion with high frequency(>100MHz). The experiment result shows that the window-type structure have great advantages in CW working mode.

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

WEYAA01

Commissioning of China ADS Demo Linac and Baseline Design of CiADS Project

112

S.H. Liu, W.L. Chen, W.P. Dou, Y. He, H. Jia, Y.S. Qin, Z.J. Wang, H.W. Zhao
IMP/CAS, Lanzhou, People’s Republic of China

China Accelerator Driven Subcritical System (C-ADS) program was launched in China in 2011, which aims to design and build an ADS demonstration facility with the capability of more than 10 MW thermal power in multiple phases lasting about 20 years. In the first phase, a demo linac has been constructed and commissioned successfully to demonstrate the key technologies of the high-power CW mode superconducting linac. Followed the China ADS roadmap, a superconducting driver linac with 500MeV and 5mA proton beam is designed for the second phase of China Initiative Accelerator Driven Subcritical System (CiADS) program. The commissioning results of the China ADS 25 MeV demo linac and the RAMI oriented beam physics design of CiADS linac are presented in this paper.

Slides WEYAA01 [17.291 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEYAA01

About •

paper received ※ 25 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)

WEOYA03

Design and Beam Commissioning of the LEAF-RFQ

135

L. Lu, Y. He, H. Jia, W. Ma, L.B. Shi, L.T. Sun, L.P. Sun, Y. Yang, Y.H. Zhai, H.W. Zhao
IMP/CAS, Lanzhou, People’s Republic of China

An 81.25 MHz continuous wave (CW) radio frequency quadrupole (RFQ) accelerator has been developed and fabricated for the Low Energy Accelerator Facility (LEAF) by the Institute of Modern Physics (IMP) of the Chinese Academy of Science (CAS). The operation frequency is 81.25 MHz and the inter-vane voltage is a constant of 70 kV. It took about 44 hours continuous conditioning to reach RF power of 75 kW which is 1.1 time of the maximum designed operation power, and the CW operation of He⁺ beam and N₂+ beam had successfully accelerated to the designed energy of 0.5 MeV/u. Both the results of the high power test and the beam test will be presented in this paper.

Slides WEOYA03 [10.750 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEOYA03

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)

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)

WEPB06

Nb Sputtered 325 MHz QWR Cavities for CiADS

145

F. Pan, H. Guo, Y. He, T.C. Jiang, T. Tan, P.R. Xiong, C. Zhang
IMP/CAS, Lanzhou, People’s Republic of China
Z.X. Li, H.N. Wang
MMRC, Fukui-ken, Japan

CIADS is considering to use quarter wave resonators (QWRs), made by niobium thin film sputtered on copper bases, at its low energy section. Comparing with bulk niobium cavities, the Nb/Cu cavities feature a much better thermal and mechanical stability at 4.5 K. A 325 MHz QWR cavity has been fabricated at IMP, to demostrate the niobium coated copper cavity technique can meet the requirements of CIADS. The cavity is coated with biased DC diode sputtering technique. This paper covers resulting film characters, vertical tests with the evolution of the sputtering process, and improvements to mitigate issues we meet.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB06

About •

paper received ※ 01 November 2018 paper accepted ※ 11 December 2018 issue date ※ 05 November 2019

Export •

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

WEPB13

A New RF Structure: Bent-Vane Type RFQ

158

L. Yang, T. He, Y. He, Y. He, L. Lu, C.C. Xing
IMP/CAS, Lanzhou, People’s Republic of China

A new cavity structure of RFQ accelerator with bent vanes is proposed to meet the miniaturization requirement of low frequency accelerators. The new structure has a downsized cross section by bending vanes while keeping a certain vane lengths. It also possesses the advantages of simple cooling structure in low frequency field. The new structure has obvious advantages in reducing manufacturing difficulty of cavity, cutting down project cost, enhancing facility reliability and stability.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2018-WEPB13

About •

paper received ※ 21 October 2018 paper accepted ※ 24 October 2018 issue date ※ 05 November 2019

Export •

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