CaltechAUTHORS
  A Caltech Library Service

Multi-dimensional optimization of a terawatt seeded tapered Free Electron Laser with a Multi-Objective Genetic Algorithm

Wu, Juhao and Hu, Newman and Setiawan, Hananiel and Huang, Xiaobiao and Raubenheimer, Tor O. and Jiao, Yi and Yu, George and Mandlekar, Ajay and Spampinati, Simone and Fang, Kun and Chu, Chungming and Qiang, Ji (2017) Multi-dimensional optimization of a terawatt seeded tapered Free Electron Laser with a Multi-Objective Genetic Algorithm. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 846 . pp. 56-63. ISSN 0168-9002. https://resolver.caltech.edu/CaltechAUTHORS:20170407-084259630

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20170407-084259630

Abstract

There is a great interest in generating high-power hard X-ray Free Electron Laser (FEL) in the terawatt (TW) level that can enable coherent diffraction imaging of complex molecules like proteins and probe fundamental high-field physics. A feasibility study of producing such X-ray pulses was carried out employing a configuration beginning with a Self-Amplified Spontaneous Emission FEL, followed by a “self-seeding” crystal monochromator generating a fully coherent seed, and finishing with a long tapered undulator where the coherent seed recombines with the electron bunch and is amplified to high power. The undulator tapering profile, the phase advance in the undulator break sections, the quadrupole focusing strength, etc. are parameters to be optimized. A Genetic Algorithm (GA) is adopted for this multi-dimensional optimization. Concrete examples are given for LINAC Coherent Light Source (LCLS) and LCLS-II-type systems. Analytical estimate is also developed to cross check the simulation and optimization results as a quick and complimentary tool.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://doi.org/10.1016/j.nima.2016.11.035DOIArticle
http://www.sciencedirect.com/science/article/pii/S0168900216311901PublisherArticle
Additional Information:© 2017 Elsevier B.V. Received 10 October 2016, Revised 10 November 2016, Accepted 18 November 2016, Available online 20 November 2016.
Subject Keywords:Free-Electron Lasers; Synchrotron radiation; Numerical optimization; Tapered undulator; Self-seeding; LCLS
Record Number:CaltechAUTHORS:20170407-084259630
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170407-084259630
Official Citation:Juhao Wu, Newman Hu, Hananiel Setiawan, Xiaobiao Huang, Tor O. Raubenheimer, Yi Jiao, George Yu, Ajay Mandlekar, Simone Spampinati, Kun Fang, Chungming Chu, Ji Qiang, Multi-dimensional optimization of a terawatt seeded tapered Free Electron Laser with a Multi-Objective Genetic Algorithm, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 846, 21 February 2017, Pages 56-63, ISSN 0168-9002, http://doi.org/10.1016/j.nima.2016.11.035. (http://www.sciencedirect.com/science/article/pii/S0168900216311901)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75826
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Apr 2017 15:58
Last Modified:03 Oct 2019 16:54

Repository Staff Only: item control page