IPAC2017 - List of Authors (Liu, G.)

Paper	Title	Page
MOPIK085	Linear Optics Calibration at the HLS-II Storage Ring Using Model Independent Analysis	727
	G. Liu, L. Wang, F.F. Wu, K. Xuan USTC/NSRL, Hefei, Anhui, People's Republic of China
	Linear optics are the main lattice parameters characterizing the linear properties of storage rings. Especially for beta function and phase advance, they are the basic lattice functions which must be accurately calibrated to ensure high quality operation of the machine. Model Independent Analysis (MIA), which adopts mathematical statistical methods to extract the effective lattice information of storage rings by directly analyzing the turn-by-turn beam-position-monitor (BPM) measurements, has been applied at HLS-II to calibrate the linear optics model of the storage ring. The measurements of the turn-by-turn BPM data with all of the 32 BPMs are reported in this paper. The calibration results of the beta function using MIA are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK085
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TUPIK065	A Software for Smoothing Magnet Track in Particle Accelerator*	1842
	Q. Zhang, X.Y. He, G. Liu, W. Wang USTC/NSRL, Hefei, Anhui, People's Republic of China
	This article describes a software for smoothing magnet track in particle accelerator. This paper introduces the development process of the software from the aspects of interface design, algorithm analysis, parameter meaning and so on. Magnet track smoothing means that under the conditions of meeting absolute accuracy, if the relative position error of the adjacent magnet is too large, it will cause the loss of beam, we call the track curve is not smooth enough. Smooth analysis can find these magnet components, the curve is smooth after a reasonable ad-justment. The software is based on the least square method. The software is tested by using the data of HLS storage ring, the results meet the needs of the work.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK065
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THPIK064	Beam Lifetime Analysis of HLS-II Storage Ring	4242
	K. Xuan, C. Li, J.Y. Li, G. Liu, G. Liu, J.G. Wang, L. Wang, W. Xu USTC/NSRL, Hefei, Anhui, People's Republic of China
	Beam lifetime is one of the important parameters of electron storage rings, which can describe the particle loss rate quantitatively and is restrict by quantum lifetime, beam-gas scattering and Touschek effect. The upgrade project of Hefei light source, named HLSII, has greatly improved the performance of the light source. The beam lifetime has been maintained at more than 5 hours. In this paper, a combined analysis method is derived by the analysis of the beam lifetime, and the method is applied to the HLSII storage ring. The experimental results show that this method is simple and reliable for the analysis of the Touschek lifetime and beam-gas scattering lifetime.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPIK064
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Paper

Title

Page

Linear Optics Calibration at the HLS-II Storage Ring Using Model Independent Analysis

727

G. Liu, L. Wang, F.F. Wu, K. Xuan
USTC/NSRL, Hefei, Anhui, People's Republic of China

Linear optics are the main lattice parameters characterizing the linear properties of storage rings. Especially for beta function and phase advance, they are the basic lattice functions which must be accurately calibrated to ensure high quality operation of the machine. Model Independent Analysis (MIA), which adopts mathematical statistical methods to extract the effective lattice information of storage rings by directly analyzing the turn-by-turn beam-position-monitor (BPM) measurements, has been applied at HLS-II to calibrate the linear optics model of the storage ring. The measurements of the turn-by-turn BPM data with all of the 32 BPMs are reported in this paper. The calibration results of the beta function using MIA are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK085

Export •

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

TUPIK065

A Software for Smoothing Magnet Track in Particle Accelerator*

1842

Q. Zhang, X.Y. He, G. Liu, W. Wang
USTC/NSRL, Hefei, Anhui, People's Republic of China

This article describes a software for smoothing magnet track in particle accelerator. This paper introduces the development process of the software from the aspects of interface design, algorithm analysis, parameter meaning and so on. Magnet track smoothing means that under the conditions of meeting absolute accuracy, if the relative position error of the adjacent magnet is too large, it will cause the loss of beam, we call the track curve is not smooth enough. Smooth analysis can find these magnet components, the curve is smooth after a reasonable ad-justment. The software is based on the least square method. The software is tested by using the data of HLS storage ring, the results meet the needs of the work.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK065

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

THPIK064

Beam Lifetime Analysis of HLS-II Storage Ring

4242

K. Xuan, C. Li, J.Y. Li, G. Liu, G. Liu, J.G. Wang, L. Wang, W. Xu
USTC/NSRL, Hefei, Anhui, People's Republic of China

Beam lifetime is one of the important parameters of electron storage rings, which can describe the particle loss rate quantitatively and is restrict by quantum lifetime, beam-gas scattering and Touschek effect. The upgrade project of Hefei light source, named HLSII, has greatly improved the performance of the light source. The beam lifetime has been maintained at more than 5 hours. In this paper, a combined analysis method is derived by the analysis of the beam lifetime, and the method is applied to the HLSII storage ring. The experimental results show that this method is simple and reliable for the analysis of the Touschek lifetime and beam-gas scattering lifetime.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPIK064

Export •

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