IPAC2017 - List of Authors (Xu, H.S.)

Paper	Title	Page
WEPAB052	Progress of the Lattice Design and Physics Studies on the High Energy Photon Source	2697
	Y. Jiao, X. Cui, Z. Duan, Y.Y. Guo, D. Ji, J.Y. Li, X.Y. Li, Y.M. Peng, Q. Qin, S.K. Tian, J.Q. Wang, N. Wang, Y. Wei, G. Xu, H.S. Xu, F. Yan, C.H. Yu, Y.L. Zhao IHEP, Beijing, People's Republic of China
	Funding: Work supported by NSFC (11475202, 11405187, 11205171) The High Energy Photon Source (HEPS) is a 6-GeV, kilometer-scale, ultralow-emittance storage ring light source to be built in Beijing, China. In this paper we will discuss the progress of the lattice design and related physics studies on HEPS, covering issues of storage ring design, booster design, injection design, collective effects, error study, insertion device effects, longitudinal dynamics, etc.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB052
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THPAB029	Simulation of the Single Bunch Instabilities for the High Energy Photon Source	3760
	Z. Duan, N. Wang, H.S. Xu IHEP, Beijing, People's Republic of China
	Funding: Work supported by Natural Science Foundation of China (No.11605212). Timing modes pursing a large single bunch charge will be important operation modes for the green-field High Energy Photon Source (HEPS). The single bunch instabilities are simulated with the elegant tracking code, based on the current impedance budget. In particular, a novel on-axis accumulation scheme* based on the RF gymnastics of an active double-RF system was proposed as a candidate injection scheme for HEPS, while the zero-current rms bunch length dramatically decreases during the injection, from 32 mm to 3 mm, over a time duration of about 200 ms. The single bunch instabilities are evaluated for both the operation mode with optimal bunch lengthening as well as the injection mode with the very short bunch length, as a first step in understanding the possible beam instability for this injection scheme. * G. Xu, et al., in Proc. IPAC'16, pp. 2886-2888. Z. Duan, et al., in Proc. eeFACT 2016.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB029
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THPAB030	Studies on Collective Instabilities in HEPS	3763
	N. Wang, Z. Duan, C. Li, S.K. Tian, H.S. Xu IHEP, Beijing, People's Republic of China
	The High Energy Photon Source (HEPS) is a new designed photon source at beam energy of 6 GeV. Due to the small beam size and increased coupling impedance with the restricted beam pipe aperture, the collective effects may bring new challenges to the physical design of the machine. The collective instabilities are estimated for different operation mode. The critical instability issues are also identified for each mode.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB030
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THPAB051	A GPU Variant of Mbtrack and Its Application in SLS-2	3827
	U. Locans, A. Adelmann, L. Stingelin, H.S. Xu PSI, Villigen PSI, Switzerland U. Locans University of Latvia, Riga, Latvia
	Mbtrack is a widely used multi-bunch tracking code, developed at SOLEIL, for modeling the collective instabilities in electron storage rings. It has been applied to the Swiss Light Source upgrade proposal (SLS-2) for the study of single bunch instabilities. However, an n-bunch simulation using mbtrack requires to run n+1 MPI processes. Therefore, a large scale computing cluster may be necessary to perform the simulation. In order to reduce the demands of computing resources for multi-bunch simulations, a CUDA version of mbtrack has been developed, in which the computations of mbtrack are offloaded to a graphics processing unit (GPU). With the mbtrack-cuda variant, multi-bunch simulations can now run in a standalone workstation equipped with an Nvidia graphics card for scientific computing. The implementation and benchmark of the mbtrack-cuda code together with the applications in the study of longitudinal instabilities for SLS-2 will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB051
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Paper

Title

Page

Progress of the Lattice Design and Physics Studies on the High Energy Photon Source

2697

Y. Jiao, X. Cui, Z. Duan, Y.Y. Guo, D. Ji, J.Y. Li, X.Y. Li, Y.M. Peng, Q. Qin, S.K. Tian, J.Q. Wang, N. Wang, Y. Wei, G. Xu, H.S. Xu, F. Yan, C.H. Yu, Y.L. Zhao
IHEP, Beijing, People's Republic of China

Funding: Work supported by NSFC (11475202, 11405187, 11205171)
The High Energy Photon Source (HEPS) is a 6-GeV, kilometer-scale, ultralow-emittance storage ring light source to be built in Beijing, China. In this paper we will discuss the progress of the lattice design and related physics studies on HEPS, covering issues of storage ring design, booster design, injection design, collective effects, error study, insertion device effects, longitudinal dynamics, etc.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB052

Export •

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

THPAB029

Simulation of the Single Bunch Instabilities for the High Energy Photon Source

3760

Z. Duan, N. Wang, H.S. Xu
IHEP, Beijing, People's Republic of China

Funding: Work supported by Natural Science Foundation of China (No.11605212).
Timing modes pursing a large single bunch charge will be important operation modes for the green-field High Energy Photon Source (HEPS). The single bunch instabilities are simulated with the elegant tracking code, based on the current impedance budget. In particular, a novel on-axis accumulation scheme* based on the RF gymnastics of an active double-RF system was proposed as a candidate injection scheme for HEPS, while the zero-current rms bunch length dramatically decreases during the injection, from 32 mm to 3 mm, over a time duration of about 200 ms. The single bunch instabilities are evaluated for both the operation mode with optimal bunch lengthening as well as the injection mode with the very short bunch length, as a first step in understanding the possible beam instability for this injection scheme.
* G. Xu, et al., in Proc. IPAC'16, pp. 2886-2888. Z. Duan, et al., in Proc. eeFACT 2016.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB029

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

THPAB030

Studies on Collective Instabilities in HEPS

3763

N. Wang, Z. Duan, C. Li, S.K. Tian, H.S. Xu
IHEP, Beijing, People's Republic of China

The High Energy Photon Source (HEPS) is a new designed photon source at beam energy of 6 GeV. Due to the small beam size and increased coupling impedance with the restricted beam pipe aperture, the collective effects may bring new challenges to the physical design of the machine. The collective instabilities are estimated for different operation mode. The critical instability issues are also identified for each mode.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB030

Export •

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

THPAB051

A GPU Variant of Mbtrack and Its Application in SLS-2

3827

U. Locans, A. Adelmann, L. Stingelin, H.S. Xu
PSI, Villigen PSI, Switzerland
U. Locans
University of Latvia, Riga, Latvia

Mbtrack is a widely used multi-bunch tracking code, developed at SOLEIL, for modeling the collective instabilities in electron storage rings. It has been applied to the Swiss Light Source upgrade proposal (SLS-2) for the study of single bunch instabilities. However, an n-bunch simulation using mbtrack requires to run n+1 MPI processes. Therefore, a large scale computing cluster may be necessary to perform the simulation. In order to reduce the demands of computing resources for multi-bunch simulations, a CUDA version of mbtrack has been developed, in which the computations of mbtrack are offloaded to a graphics processing unit (GPU). With the mbtrack-cuda variant, multi-bunch simulations can now run in a standalone workstation equipped with an Nvidia graphics card for scientific computing. The implementation and benchmark of the mbtrack-cuda code together with the applications in the study of longitudinal instabilities for SLS-2 will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB051

Export •

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