HB2016 - List of Authors (Liu, Zh.C.)

Paper

Title

Page

Beam Dynamics Study of C-Ads Injector-I With Developing P-Topo Code

195

Zh.C. Liu, C. Li, Q. Qin, F. Yan, Y.L. Zhao
IHEP, Beijing, People's Republic of China

A parallelized, time-dependent 3D particle simulation code is under developing to study the high-intensity beam dynamics in linear accelerators. The self-consistent space charge effect is taken into account with the Particle-In-Cell (PIC) method. In this paper, the structure of program and the parallel strategy are demonstrated. Then, we show the results of code verification and benchmarking. It is proved that the solvers in P-TOPO code and parallel strategy are reliable and efficient. Finally, the beam dynamics simulation of C-ADS Injector-I at IHEP are launched with P-TOPO and other codes. The possible reasons for the differences between results given by separated codes are also proposed.

Poster MOPL006 [2.169 MB]

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THPM6Y01

Collective Beam Instability and Beam Halo Due to Space Charge

C. Li, Zh.C. Liu, Q. Qin
IHEP, Beijing, People's Republic of China
R.A. Jameson
IAP, Frankfurt am Main, Germany

The collective mode instability in high intensity ion beam induced by space charge has been studied for several decades. Beam halo also will be formed if beam is located in the collective mode unstable stop band. In this paper, firstly we clearly show that the beam surface is distorted by the space charge potential perturbation; the formed n-fold structure is in particular to the nth order unstable collective mode. Secondly, the formed n-fold structure will lead to beam halo with beam evolution. The halo mechanism could be depicted by resonance between single particle and oscillation collective mode. Finally, we proved that the halo particles are those whose actions were modified significantly by the nonlinear space charge and resonance.

Slides THPM6Y01 [1.318 MB]

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Paper	Title	Page
MOPL006	Beam Dynamics Study of C-Ads Injector-I With Developing P-Topo Code	195
	Zh.C. Liu, C. Li, Q. Qin, F. Yan, Y.L. Zhao IHEP, Beijing, People's Republic of China
	A parallelized, time-dependent 3D particle simulation code is under developing to study the high-intensity beam dynamics in linear accelerators. The self-consistent space charge effect is taken into account with the Particle-In-Cell (PIC) method. In this paper, the structure of program and the parallel strategy are demonstrated. Then, we show the results of code verification and benchmarking. It is proved that the solvers in P-TOPO code and parallel strategy are reliable and efficient. Finally, the beam dynamics simulation of C-ADS Injector-I at IHEP are launched with P-TOPO and other codes. The possible reasons for the differences between results given by separated codes are also proposed.
	Poster MOPL006 [2.169 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPM6Y01	Collective Beam Instability and Beam Halo Due to Space Charge
	C. Li, Zh.C. Liu, Q. Qin IHEP, Beijing, People's Republic of China R.A. Jameson IAP, Frankfurt am Main, Germany
	The collective mode instability in high intensity ion beam induced by space charge has been studied for several decades. Beam halo also will be formed if beam is located in the collective mode unstable stop band. In this paper, firstly we clearly show that the beam surface is distorted by the space charge potential perturbation; the formed n-fold structure is in particular to the nth order unstable collective mode. Secondly, the formed n-fold structure will lead to beam halo with beam evolution. The halo mechanism could be depicted by resonance between single particle and oscillation collective mode. Finally, we proved that the halo particles are those whose actions were modified significantly by the nonlinear space charge and resonance.
	Slides THPM6Y01 [1.318 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)