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

AYDIN A., KETENOĞLU B., Bostanci E.

INDIAN JOURNAL OF PURE & APPLIED PHYSICS, cilt.58, sa.8, ss.635-641, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 58 Sayı: 8
  • Basım Tarihi: 2020
  • Dergi Adı: INDIAN JOURNAL OF PURE & APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.635-641
  • Anahtar Kelimeler: Undulator, X-ray free-electron laser, Self amplified spontaneous emission, Multiple objective evolutionary algorithms, Linear accelerator, DESIGN
  • Ankara Üniversitesi Adresli: Evet

Özet

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 angstrom <= lambda(FEL) <= 1.5 angstrom 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 (lambda(n)) and undulator gap (g) is adopted here to find optimal values for saturation power (P-sat) and lambda(FEL) subject to several physical constraints on lambda(u) and g such as the ratio of g/lambda(u) and L-sat. It is shown that MOEA gives optimal solutions for estimation of L-sat with plausible P-sat values.