HB2016 - List of Authors (Yang, Y.)

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Title

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Analyzing and Matching of Mixed High Intensity Highly Charged Ion Beams

422

X.H. Zhang, C. Qian, L.T. Sun, Y. Yang, X. Yin, Y.J. Yuan, H.W. Zhao
IMP/CAS, Lanzhou, People's Republic of China

Funding: Work supported by the National Natural Science Foundation of China (No. 11575265, 11427904) and the “973” Program of China (No. 2014CB845501).
Electron cyclotron resonance (ECR) ion sources are widely used in heavy ion accelerators for their advantages in producing high quality intense beams of highly charged ions. However, it exists challenges in the design of the Q/A selection systems for mixed high intensity ion beams to reach sufficient Q/A resolution while controlling the beam emittance growth. Moreover, as the emittance of beam from ECR ion sources is coupled, the matching of phase space to post accelerator, for a wide range of ion beam species with different intensities, should be carefully studied. In this paper, the simulation and experimental results of the Q/A selection system at the LECR4 platform are shown. The formation of hollow cross section heavy ion beam at the end of the Q/A selector is revealed. A reasonable interpretation has been proposed, a modified design of the Q/A selection system has been committed for HIRFL-SSC linac injector. The features of the new design including beam simulations and experiment results are also presented.

Slides WEAM5Y01 [3.244 MB]

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WEPM7Y01

Transverse Coupling Property of Beam From ECR Ion Sources

Y. Yang
IMP/CAS, Lanzhou, People's Republic of China

Experimental evidence of the property of transverse coupling of beam from Electron Cyclotron Resonance (ECR) ion source is presented. It is especially of interest for an ECR ion source, where the cross section of extracted beam is not round along transport path due to the magnetic confinement configuration. When the ions are extracted and accelerated through the descending axial magnetic field at the extraction region, the horizontal and vertical phase space strongly coupled. In this study, the coupling configuration between the transverse phase spaces of the beam from ECR ion source is achieved by beam back-tracking simulation based on the measurements. The reasonability of this coupling configuration has been proven by a series of subsequent simulations. Based on this study, an improved operation scheme for the SFC injector line at IMP has been proposed to reduce the projection emittances by beam decoupling. Preliminary test has verified this proposal.

Slides WEPM7Y01 [4.392 MB]

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Paper	Title	Page
WEAM5Y01	Analyzing and Matching of Mixed High Intensity Highly Charged Ion Beams	422
	X.H. Zhang, C. Qian, L.T. Sun, Y. Yang, X. Yin, Y.J. Yuan, H.W. Zhao IMP/CAS, Lanzhou, People's Republic of China
	Funding: Work supported by the National Natural Science Foundation of China (No. 11575265, 11427904) and the “973” Program of China (No. 2014CB845501). Electron cyclotron resonance (ECR) ion sources are widely used in heavy ion accelerators for their advantages in producing high quality intense beams of highly charged ions. However, it exists challenges in the design of the Q/A selection systems for mixed high intensity ion beams to reach sufficient Q/A resolution while controlling the beam emittance growth. Moreover, as the emittance of beam from ECR ion sources is coupled, the matching of phase space to post accelerator, for a wide range of ion beam species with different intensities, should be carefully studied. In this paper, the simulation and experimental results of the Q/A selection system at the LECR4 platform are shown. The formation of hollow cross section heavy ion beam at the end of the Q/A selector is revealed. A reasonable interpretation has been proposed, a modified design of the Q/A selection system has been committed for HIRFL-SSC linac injector. The features of the new design including beam simulations and experiment results are also presented.
	Slides WEAM5Y01 [3.244 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPM7Y01	Transverse Coupling Property of Beam From ECR Ion Sources
	Y. Yang IMP/CAS, Lanzhou, People's Republic of China
	Experimental evidence of the property of transverse coupling of beam from Electron Cyclotron Resonance (ECR) ion source is presented. It is especially of interest for an ECR ion source, where the cross section of extracted beam is not round along transport path due to the magnetic confinement configuration. When the ions are extracted and accelerated through the descending axial magnetic field at the extraction region, the horizontal and vertical phase space strongly coupled. In this study, the coupling configuration between the transverse phase spaces of the beam from ECR ion source is achieved by beam back-tracking simulation based on the measurements. The reasonability of this coupling configuration has been proven by a series of subsequent simulations. Based on this study, an improved operation scheme for the SFC injector line at IMP has been proposed to reduce the projection emittances by beam decoupling. Preliminary test has verified this proposal.
	Slides WEPM7Y01 [4.392 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)