IPAC2015 - List of Authors (Zhao, Y.L.)

Paper	Title	Page
MOPWA061	ADS Injector I Frequency Choice at IHEP	265
	F. Yan, H. Geng, C. Meng, H.F. Ouyang, S. Pei, Y.L. Zhao IHEP, Beijing, People's Republic of China
	Funding: Chinese Academy of Science (CAS) strategic Priority Research Program-Future Advanced Nuclear Fission Energy (Accelerator-Driven Sub-critical System) The China ADS driver linac is composed of two major parts: the injector and the main linac. There are two frequency choices for the injector: 325 MHz and 162.5 MHz. The former choice is benefit for the same frequency with the front end of the main linac. For half frequency choice, to obtain the same longitudinal acceptance of the main linac comparing with 325MHz injector, the tune depression of the beam reaches the lower design limit of 0.5, no current upgrade opportunity is reserved; contrarily to get the same space charge effect, 16 more cavities would be the cost to get the same acceptance. However the disadvantage of the 325MHz injector choice is the bigger power density of the copper structure CW RFQ and the smaller longitudinal acceptance of the SC section. The details of the comparing for the two frequency choices are introduced and presented. *Work supported by Chinese Academy of Science (CAS) strategic Priority Research Program-Future Advanced Nuclear Fission Energy (Accelerator-Driven Sub-critical System)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA061
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MOPWA069	Upgrades on a Scalable Software Package for Large Scale Beam Dynamic Simulations	282
	X.T. Dong, K. Du, J. Xu, R. Zhao IS, Beijing, People's Republic of China Y. He, Z.J. Wang IMP/CAS, Lanzhou, People's Republic of China C. Li, Q. Qin, Y.L. Zhao IHEP, Beijing, People's Republic of China
	Large-scale particle tracking is important for precise design and optimization of the linear accelerator. In this paper a parallel software recently developed for beam dynamics simulation has been benchmarked. The software is based on Particle-In-Cell method, and calculates space charge field by an efficient three-dimension parallel fast Fourier transform method. It uses domain decomposition and MPI library for parallelization. The characteristics of this software are optimized software structure and suitable for modern supercomputers. Several standard accelerating devices have been used to compare the simulation results with other beam dynamics software. They have been run on several different platforms, such as INSPUR cluster at RDCPS, and SHENGTENG7000 at IMPCAS. At first, some simulation results for RFQ with large number of particles will be shown.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA069
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

ADS Injector I Frequency Choice at IHEP

265

F. Yan, H. Geng, C. Meng, H.F. Ouyang, S. Pei, Y.L. Zhao
IHEP, Beijing, People's Republic of China

Funding: Chinese Academy of Science (CAS) strategic Priority Research Program-Future Advanced Nuclear Fission Energy (Accelerator-Driven Sub-critical System)
The China ADS driver linac is composed of two major parts: the injector and the main linac. There are two frequency choices for the injector: 325 MHz and 162.5 MHz. The former choice is benefit for the same frequency with the front end of the main linac. For half frequency choice, to obtain the same longitudinal acceptance of the main linac comparing with 325MHz injector, the tune depression of the beam reaches the lower design limit of 0.5, no current upgrade opportunity is reserved; contrarily to get the same space charge effect, 16 more cavities would be the cost to get the same acceptance. However the disadvantage of the 325MHz injector choice is the bigger power density of the copper structure CW RFQ and the smaller longitudinal acceptance of the SC section. The details of the comparing for the two frequency choices are introduced and presented.
*Work supported by Chinese Academy of Science (CAS) strategic Priority Research Program-Future Advanced Nuclear Fission Energy (Accelerator-Driven Sub-critical System)

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA061

Export •

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

MOPWA069

Upgrades on a Scalable Software Package for Large Scale Beam Dynamic Simulations

282

X.T. Dong, K. Du, J. Xu, R. Zhao
IS, Beijing, People's Republic of China
Y. He, Z.J. Wang
IMP/CAS, Lanzhou, People's Republic of China
C. Li, Q. Qin, Y.L. Zhao
IHEP, Beijing, People's Republic of China

Large-scale particle tracking is important for precise design and optimization of the linear accelerator. In this paper a parallel software recently developed for beam dynamics simulation has been benchmarked. The software is based on Particle-In-Cell method, and calculates space charge field by an efficient three-dimension parallel fast Fourier transform method. It uses domain decomposition and MPI library for parallelization. The characteristics of this software are optimized software structure and suitable for modern supercomputers. Several standard accelerating devices have been used to compare the simulation results with other beam dynamics software. They have been run on several different platforms, such as INSPUR cluster at RDCPS, and SHENGTENG7000 at IMPCAS. At first, some simulation results for RFQ with large number of particles will be shown.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA069

Export •

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