Optimization of SASE operation for an X-ray free-electron laser Using multiple objective evolutionary algorithms

Indian Journal of Pure & Applied Physics

article

Ayhan Aydin¹  Bora Ketenoglu²  Erkan Bostanci¹ 

[1] Department of Computer Engineering, Ankara University;Department of Engineering Physics, Ankara University

关键词: Undulator;    X-ray free-electron laser;    Self amplified spontaneous emission;    Multiple objective evolutionary algorithms;    Linear accelerator;    Article;   

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

Performance of Self Amplifed Spontaneous Emission (SASE) operation for an X-ray Free-Electron Laser (FEL), is optimized by Multiple Objective Evolutionary Algorithms (MOEA). Different types of hybrid planar undulators are considered to achieve 0.5 Å ≤ λFEL ≤ 1.5 Å wavelength range. This demand is regarded as a continuous optimization problem, and hence, an evolutionary algorithm is designed to find optimal FEL performance parameters. An encoding scheme comprising of undulator period (λu) and undulator gap (g) is adopted here to find optimal values for saturation power (Psat) and λFEL subject to several physical constraints on λu and g such as the ratio of g/λu and Lsat. It is shown that MOEA gives optimal solutions for estimation of Lsat with plausible Psat values.

【 授权许可】

Unknown