IPAC2013 - List of Authors (Zhang, Q.)

Paper	Title	Page
TUPWA030	Impedances Calculations of Bellows in HLS II Storage Ring	1784
	Q. Zhang, W. Li, L. Wang USTC/NSRL, Hefei, Anhui, People's Republic of China
	The upgrade project of Hefei Lighe Source storage ring is carrying on.In this project,a new Bellows, in which shielding is provided by sprung fingers which can slide along the beam screen,is installed at the accelerator interaction area In order to reduce this impedance to an acceptable value. The contributions of Bellows to short range wakefields and broadband impedance were calculated numerically by Mafia code .

WEPEA025	Chromatic Sextupole Pair Optimization Methods for Enlarging Dynamic Aperture	2555
	Z. Bai, Q.K. Jia, W. Li, L. Wang, Q. Zhang USTC/NSRL, Hefei, Anhui, People's Republic of China
	Based on the step-by-step chromaticity compensation method [1] and artificial intelligence algorithms, we propose new numerical methods, called chromatic sextupole pair optimization methods, for enlarging the dynamic aperture of electron storage rings. In the new methods, the decision variables related to chromatic sextupole pairs are optimized using artificial intelligence algorithms to enlarge the dynamic aperture. We demonstrate that the new methods are equivalent to the recently used numerical method, in which the decision variables, sextupole strengths, are optimized using artificial intelligence algorithms. [1] E. Levichev, P. Piminov, Proceedings of EPAC 2006, p. 2116.

Paper

Title

Page

Impedances Calculations of Bellows in HLS II Storage Ring

1784

Q. Zhang, W. Li, L. Wang
USTC/NSRL, Hefei, Anhui, People's Republic of China

The upgrade project of Hefei Lighe Source storage ring is carrying on.In this project,a new Bellows, in which shielding is provided by sprung fingers which can slide along the beam screen,is installed at the accelerator interaction area In order to reduce this impedance to an acceptable value. The contributions of Bellows to short range wakefields and broadband impedance were calculated numerically by Mafia code .

WEPEA025

Chromatic Sextupole Pair Optimization Methods for Enlarging Dynamic Aperture

2555

Z. Bai, Q.K. Jia, W. Li, L. Wang, Q. Zhang
USTC/NSRL, Hefei, Anhui, People's Republic of China

Based on the step-by-step chromaticity compensation method [1] and artificial intelligence algorithms, we propose new numerical methods, called chromatic sextupole pair optimization methods, for enlarging the dynamic aperture of electron storage rings. In the new methods, the decision variables related to chromatic sextupole pairs are optimized using artificial intelligence algorithms to enlarge the dynamic aperture. We demonstrate that the new methods are equivalent to the recently used numerical method, in which the decision variables, sextupole strengths, are optimized using artificial intelligence algorithms.
[1] E. Levichev, P. Piminov, Proceedings of EPAC 2006, p. 2116.