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DOI:10.18429/JACoW-FEL2015-WEP075
Title Femtosecond X-ray Pulse Generation with an Energy Chirped Electron Beam
Authors
  • C. Emma, C. Pellegrini
    UCLA, Los Angeles, USA
  • Y. Ding, Z. Huang, A.A. Lutman, G. Marcus, A. Marinelli, C. Pellegrini
    SLAC, Menlo Park, California, USA
Abstract We study the generation of short (sub 10 fs) pulses in the X-ray spectral region using an energy chirped electron beam in a Self Amplified Spontaneous Emission Free Electron Laser (SASE FEL) and a self-seeding monochromator [1]-[2]. The monochromator filters a small bandwidth, short duration pulse from the frequency chirped SASE spectrum. This pulse is used to seed a small fraction of the long chirped beam, hence a short pulse with narrow bandwidth is amplified in the following undulators. We present start-to-end simulation results for LCLS operating in the soft X-ray self-seeded mode with an energy chirp of 1% over 30 fs and a bunch charge of 150pC. We demonstrate the potential to generate ~5 fs pulses with a bandwidth ~0.3eV. We also assess the possibility of further shortening the pulse by utilizing one more chicane after the self-seeding stage and shifting the radiation pulse to a 'fresh' part of the electron beam. Experimental study on this short pulse seeding mode has been planned at the LCLS.
Paper download WEP075.PDF [1.216 MB / 4 pages]
Conference FEL2015, Daejeon, Republic of Korea
Series International Free Electron Laser Conference (37th)
Proceedings Link to full FEL2015 Proccedings
Session Poster Session
Date 26-Aug-15   15:00–17:00
Main Classification Advanced Concepts and Techniques
Keywords electron, radiation, undulator, simulation, FEL
Publisher JACoW, Geneva, Switzerland
Editors Heung-Sik Kang (PAL, Pohang, Republic of Korea); Dong Eon Kim (PAL, Pohang, Republic of Korea); Volker RW Schaa (GSI, Darmstadt, Germany);
ISBN 978-3-95450-134-2
Published December 2015
Copyright
Copyright © 2015 by JACoW, Geneva, Switzerland     CC-BY Creative Commons License
cc Creative Commons Attribution 3.0