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Optimization of magnet sorting in a storage ring using genetic algorithms

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Chinese Physics C 2013年第12期37卷 98-104页

作者：陈佳王琳李为民高巍巍 National Synchrotron Radiation Laboratory University of Science and Technology of China

In this paper, the genetic algorithms are applied to the optimization problem of magnet sorting in an electron storage ring, according to which the objectives are set so that the closed orbit distortion and beta beating can be minimized and the dynamic aperture maximized. The sorting of dipole, quadrupole and sextupole magnets is optimized while the optimization results show the power of the application of genetic algorithms in magnet sorting.

关键词： storage ring magnet sorting closed orbit distortion beta beating dynamic aperture genetic algorithms

Optimal placement of magnets in Indus-2 storage ring

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Chinese Physics C 2015年第3期39卷 58-65页

作者： Riyasat Husain A D Ghodke Gurnam Singh Raja Ramanna Centre for Advanced Technology

In Indus-2, by optimizing the position of the magnetic elements, using the simulated annealing algorithm, at different locations in the ring with their field errors, the effects on beam parameters have been minimized. closed orbit distortion and beta beat are considerably reduced by optimizing the dipole and quadrupole magnets positions in the ring. For the Indus-2 storage ring, sextupole optimization gives insignificant improvement in dynamic aperture with chromaticity-correcting sextupoles. The magnets have been placed in the ring with the optimized sequence and storage of the beam has been achieved at injection energy without energizing any corrector magnets. Magnet sorting has led to the easy beam current accumulation and the measurement of parameters such as closed orbit distortion, beta function, dispersion, dynamic aperture etc.

关键词： sorting magnet-to-magnet errors beta beat closed orbit distortion dynamic aperture simulatedannealing

Studies of closed orbit correction and slow orbit feedback for the SSRF storage ring

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Chinese Physics C 2009年第2期33卷 145-150页

作者：后接田顺强张满洲徐毅刘桂民 Shanghai Institute of Applied Physics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Details of the active ways to suppress closed orbit distortion （COD）, including bending magnet sorting and survey and alignment of the magnets, are discussed based on the studies of affections to the COD by the bending magnet field error and the misalignment of quadrupoles. The closed orbit correction and the Slow orbit Feed Back （SOFB） system for the SSRF storage ring are presented in this paper. With these available methods, better results were obtained during the commissioning period with 3 GeV beam energy.

关键词： SSRF closed orbit distortion slow orbit feedback sorting alignment SOFB