HB2016 - List of Authors (Wang, X.W.)

Paper	Title	Page
MOPR004	H⁻ Charge Exchange Injection for XiPAF Synchrotron	49
	H.J. Yao, X. Guan, G.R. Li, X.W. Wang, Q.Z. Xing, S.X. Zheng TUB, Beijing, People's Republic of China
	The physics design of the H⁻ charge exchange injection system for Xi’an Proton Application Facility (XiPAF) synchrotron with the missing dipole lattice is discussed. The injection scheme is composed of one septum magnet, three chicane dipoles, two bump magnets and one carbon stripping foil. A 7 μg/cm² carbon foil is chosen for 7 MeV H⁻ beam for high stripping efficiency and low coulomb scattering effect. The simulation results of the horizontal and vertical phase space painting finished by two bumper magnets and mismatching respectively are presented.
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MOPR005	RF-Knockout Slow Extraction Design for XiPAF Synchrotron	52
	H.J. Yao, X. Guan, G.R. Li, X.W. Wang, Q. Zhang, S.X. Zheng TUB, Beijing, People's Republic of China
	The physics design of slow extraction for Xi’an Proton Application Facility (XiPAF) synchrotron is discussed. The extraction scheme is composed of two resonant sextupoles, one electrostatic septum (ES) and two septum magnets. The phase space diagram under the Hardt condition at the entrance of ES and the last three turn’s trajectory before extraction are presented. A program is written with C++ to simulate slow extraction process by RF-knockout (RF-KO), the calculation results of dual frequency modulation (FM) and amplitude modulation (AM) are given, and the standard deviation of the fluctuation parameter R1 can be limited 0.2 with optimum parameters under a sampling frequency of about 10 kHz.
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MOPR006	Design of the 230MeV Proton Accelerator for Xi'an Proton Application Facility	55
	H.J. Yao, H.B. Chen, C. Cheng, C.T. Du, L. Du, T.B. Du, X. Guan, W.-H. Huang, H. Jiang, G.R. Li, C.-X. Tang, R. Tang, D. Wang, W. Wang, X.W. Wang, L. Wu, Q.Z. Xing, Y. Yang, Z. Yang, H.J. Zeng, H.Y. Zhang, Q. Zhang, Q.Z. Zhang, S.X. Zheng TUB, Beijing, People's Republic of China W. Chen NINT, Xi'an, People's Republic of China W.Q. Guan, Y. He, J. Li NUCTECH, Beijing, People's Republic of China S.-Y. Lee Indiana University, Bloomington, Indiana, USA M.T. Qiu, B.C. Wang, Y.P. Wang, Z.M. Wang, Y.H. Yan, H.Z. Zhang, C. Zhao State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Shannxi, People's Republic of China
	We report a design of the 230 MeV proton accelera-tor, the Xi’an Proton Application Facility (XiPAF), which will be located in Xi’an city, China. The facility will provide proton beam with the maximum energy of 230 MeV for the research of the single event effect. The facility, composed of a 230 MeV synchrotron, a 7 MeV H⁻ linac injector and two experimental stations, will provide a flux of 10⁵~10⁸ p/cm²/s with the uni-formity of better than 90% on the 10 cm×10 cm sample.
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MOPR007	Cold and High Power Test of Large Size Magnetic Alloy Core for XiPAF's Synchrotron	59
	G.R. Li, X. Guan, W.-H. Huang, X.W. Wang, Z. Yang, H.J. Yao, H.J. Zeng, S.X. Zheng TUB, Beijing, People's Republic of China
	A compact magnetic alloy (MA) loaded cavity is under development for XiPAF's synchrotron. The cavity contains 6 large size MA cores, each is independently coupled with solid state power amplifier. Two types of MA core are proposed for the project. We have developed a single core model cavity to verify the impedance model and to test the properties of MA cores under high power state. The high power test results are presented and discussed.
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WEAM3Y01	Present Status of the High Current Linac at Tsinghua University and Its Application	413
	Q.Z. Xing, D.T. Bin, C. Cheng, C.T. Du, L. Du, T.B. Du, X. Guan, Q.K. Guo, H. Jiang, C.-X. Tang, R. Tang, D. Wang, X.W. Wang, L. Wu, H.Y. Zhang, Q.Z. Zhang, S.X. Zheng TUB, Beijing, People's Republic of China W.Q. Guan, Y. He, J. Li NUCTECH, Beijing, People's Republic of China
	The CPHS (Compact Pulsed Hadron Source) linac at Tsinghua University, is now in operation as an achievement of its mid-term objective. Presently the RFQ accelerator is operated stably with the beam energy of 3 MeV, peak current of 26 mA, pulse length of 100 μs and repetition rate of 20 Hz. After the maintenance period the transmission rate of the RFQ accelerator has been recovered from 65% to 91%. The application of the proton and neutron beam is introduced in this paper.
	Slides WEAM3Y01 [8.616 MB]
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WEPM5Y01	H⁻ Beam Dynamics Study of a LEBT in XiPAF Project with the WARP PIC Code	449
	R. Ruo, L. Du, T.B. Du, X. Guan, C.-X. Tang, X.W. Wang, Q.Z. Xing, H.Y. Zhang, Q.Z. Zhang TUB, Beijing, People's Republic of China Y. He, J. Li NUCTECH, Beijing, People's Republic of China
	The 7 MeV H⁻ linac injector of Xi‘an Proton Application Facility (XiPAF) is composed of an ECR ion source, a Low Energy Beam Transport line (LEBT), a Radio Frequency Quadrupole accelerator (RFQ) and a Drift Tube Linac (DTL). The 1.7 m-long LEBT is used for matching a 40 μs pulse width 6 mA peak current beam to the entrance of the RFQ accelerator. The peak current and pulse-width of the 50 keV H⁻ beam extracted from the ion source is 10 mA and 1 ms respectively. In the LEBT, an adjustable aperture is used for scraping the peak current of the beam to 6 mA, and an electric chopper is used for chopping the beam pulse width to 40 μs. These elements make the space charge compensation problem more complicated. A careful simulation of the space charge compensation problem of the H⁻ beam has been done by considering the beam particles interacting with the residual gas with the help of WARP PIC code. To achieve the requirements of the LEBT in XiPAF, the type and pressure of the residual gas is given according to the simulation results.
	Slides WEPM5Y01 [5.926 MB]
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Paper

Title

Page

H⁻ Charge Exchange Injection for XiPAF Synchrotron

49

H.J. Yao, X. Guan, G.R. Li, X.W. Wang, Q.Z. Xing, S.X. Zheng
TUB, Beijing, People's Republic of China

The physics design of the H⁻ charge exchange injection system for Xi’an Proton Application Facility (XiPAF) synchrotron with the missing dipole lattice is discussed. The injection scheme is composed of one septum magnet, three chicane dipoles, two bump magnets and one carbon stripping foil. A 7 μg/cm² carbon foil is chosen for 7 MeV H⁻ beam for high stripping efficiency and low coulomb scattering effect. The simulation results of the horizontal and vertical phase space painting finished by two bumper magnets and mismatching respectively are presented.

Export •

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

MOPR005

RF-Knockout Slow Extraction Design for XiPAF Synchrotron

52

H.J. Yao, X. Guan, G.R. Li, X.W. Wang, Q. Zhang, S.X. Zheng
TUB, Beijing, People's Republic of China

The physics design of slow extraction for Xi’an Proton Application Facility (XiPAF) synchrotron is discussed. The extraction scheme is composed of two resonant sextupoles, one electrostatic septum (ES) and two septum magnets. The phase space diagram under the Hardt condition at the entrance of ES and the last three turn’s trajectory before extraction are presented. A program is written with C++ to simulate slow extraction process by RF-knockout (RF-KO), the calculation results of dual frequency modulation (FM) and amplitude modulation (AM) are given, and the standard deviation of the fluctuation parameter R1 can be limited 0.2 with optimum parameters under a sampling frequency of about 10 kHz.

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

MOPR006

Design of the 230MeV Proton Accelerator for Xi'an Proton Application Facility

55

H.J. Yao, H.B. Chen, C. Cheng, C.T. Du, L. Du, T.B. Du, X. Guan, W.-H. Huang, H. Jiang, G.R. Li, C.-X. Tang, R. Tang, D. Wang, W. Wang, X.W. Wang, L. Wu, Q.Z. Xing, Y. Yang, Z. Yang, H.J. Zeng, H.Y. Zhang, Q. Zhang, Q.Z. Zhang, S.X. Zheng
TUB, Beijing, People's Republic of China
W. Chen
NINT, Xi'an, People's Republic of China
W.Q. Guan, Y. He, J. Li
NUCTECH, Beijing, People's Republic of China
S.-Y. Lee
Indiana University, Bloomington, Indiana, USA
M.T. Qiu, B.C. Wang, Y.P. Wang, Z.M. Wang, Y.H. Yan, H.Z. Zhang, C. Zhao
State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Shannxi, People's Republic of China

We report a design of the 230 MeV proton accelera-tor, the Xi’an Proton Application Facility (XiPAF), which will be located in Xi’an city, China. The facility will provide proton beam with the maximum energy of 230 MeV for the research of the single event effect. The facility, composed of a 230 MeV synchrotron, a 7 MeV H⁻ linac injector and two experimental stations, will provide a flux of 10⁵~10⁸ p/cm²/s with the uni-formity of better than 90% on the 10 cm×10 cm sample.

Export •

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

MOPR007

Cold and High Power Test of Large Size Magnetic Alloy Core for XiPAF's Synchrotron

59

G.R. Li, X. Guan, W.-H. Huang, X.W. Wang, Z. Yang, H.J. Yao, H.J. Zeng, S.X. Zheng
TUB, Beijing, People's Republic of China

A compact magnetic alloy (MA) loaded cavity is under development for XiPAF's synchrotron. The cavity contains 6 large size MA cores, each is independently coupled with solid state power amplifier. Two types of MA core are proposed for the project. We have developed a single core model cavity to verify the impedance model and to test the properties of MA cores under high power state. The high power test results are presented and discussed.

Export •

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

WEAM3Y01

Present Status of the High Current Linac at Tsinghua University and Its Application

413

Q.Z. Xing, D.T. Bin, C. Cheng, C.T. Du, L. Du, T.B. Du, X. Guan, Q.K. Guo, H. Jiang, C.-X. Tang, R. Tang, D. Wang, X.W. Wang, L. Wu, H.Y. Zhang, Q.Z. Zhang, S.X. Zheng
TUB, Beijing, People's Republic of China
W.Q. Guan, Y. He, J. Li
NUCTECH, Beijing, People's Republic of China

The CPHS (Compact Pulsed Hadron Source) linac at Tsinghua University, is now in operation as an achievement of its mid-term objective. Presently the RFQ accelerator is operated stably with the beam energy of 3 MeV, peak current of 26 mA, pulse length of 100 μs and repetition rate of 20 Hz. After the maintenance period the transmission rate of the RFQ accelerator has been recovered from 65% to 91%. The application of the proton and neutron beam is introduced in this paper.

Slides WEAM3Y01 [8.616 MB]

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

WEPM5Y01

H⁻ Beam Dynamics Study of a LEBT in XiPAF Project with the WARP PIC Code

449

R. Ruo, L. Du, T.B. Du, X. Guan, C.-X. Tang, X.W. Wang, Q.Z. Xing, H.Y. Zhang, Q.Z. Zhang
TUB, Beijing, People's Republic of China
Y. He, J. Li
NUCTECH, Beijing, People's Republic of China

The 7 MeV H⁻ linac injector of Xi‘an Proton Application Facility (XiPAF) is composed of an ECR ion source, a Low Energy Beam Transport line (LEBT), a Radio Frequency Quadrupole accelerator (RFQ) and a Drift Tube Linac (DTL). The 1.7 m-long LEBT is used for matching a 40 μs pulse width 6 mA peak current beam to the entrance of the RFQ accelerator. The peak current and pulse-width of the 50 keV H⁻ beam extracted from the ion source is 10 mA and 1 ms respectively. In the LEBT, an adjustable aperture is used for scraping the peak current of the beam to 6 mA, and an electric chopper is used for chopping the beam pulse width to 40 μs. These elements make the space charge compensation problem more complicated. A careful simulation of the space charge compensation problem of the H⁻ beam has been done by considering the beam particles interacting with the residual gas with the help of WARP PIC code. To achieve the requirements of the LEBT in XiPAF, the type and pressure of the residual gas is given according to the simulation results.

Slides WEPM5Y01 [5.926 MB]

Export •

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