Multiobjective optimization of dynamic aperture

Journal Article · Mon May 02 04:00:00 EDT 2011 · Physical Review Special Topics - Accelerators and Beams

DOI:https://doi.org/10.1103/PhysRevSTAB.14.054001· OSTI ID:1019505

Yang, L; Li, Y; Guo, W; Krinsky, S

Dynamic aperture (DA) is one of the key nonlinear properties for a storage ring. Although there have been both analytical and numerical methods to find the aperture, the reverse problem of how to optimize it is still a challenging problem. A general and flexible way of optimizing the DA is highly demanded in accelerator design and operation. In this paper, we discuss the use of multiobjective optimization for DA. First we consider using objective functions based only on numerical tracking results. Data mining of these results demonstrated a correlation between DA and low-order nonlinear driving terms. Next we considered using objective functions which included both numerical tracking results and analytical estimates of low-order nonlinear driving terms. This resulted in faster convergence. The National Synchrotron Light Source II (NSLS-II) lattice was taken as an example to illustrate this method. This multiobjective approach is not limited by particular linear or nonlinear lattice settings, and can also be applied for optimizing other properties of a storage ring.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: DOE - OFFICE OF SCIENCE
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1019505
• Report Number(s): BNL--95154-2011-JA; 39KC02000
• Journal Information: Physical Review Special Topics - Accelerators and Beams, Journal Name: Physical Review Special Topics - Accelerators and Beams Journal Issue: 5 Vol. 14; ISSN 1098-4402
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
APERTURES
CONVERGENCE
DESIGN
MINING
NSLS
OPTIMIZATION
STORAGE RINGS
aperture
beams
dynamic
national synchrotron light source
nonlinear
sextupoles