Second and third harmonic measurements at the linac coherent light source

D. Ratner, A. Brachmann, F. J. Decker, Y. Ding, D. Dowell, P. Emma, A. Fisher, J. Frisch, S. Gilevich, Z. Huang, P. Hering, R. Iverson, J. Krzywinski, H. Loos, M. Messerschmidt, H. D. Nuhn, T. Smith, J. Turner, J. Welch, W. WhiteJ. Wu

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


The linac coherent light source (LCLS) is a self-amplified spontaneous emission (SASE) free-electron laser (FEL) operating at fundamental photon energies from 0.5 to 10 keV. Characterization of the higher harmonics present in the FEL beam is important to users, for whom harder x rays can either extend the useful operating wavelength range or increase experimental backgrounds. We present measurements of the power in both the second and third harmonics, and compare the results to expectations from simulations. We also present studies of the transport of harmonics to the users, and the harmonic power as a function of electron beam quality.

Original languageEnglish (US)
Article number060701
JournalPhysical Review Special Topics - Accelerators and Beams
Issue number6
StatePublished - Jun 2 2011
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces


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