Phys. Rev. Lett. 88, 204801 (2002) [4 pages]Experimental Characterization of Nonlinear Harmonic Radiation from a Visible Self-Amplified Spontaneous Emission Free-Electron Laser at Saturation |
A. Tremaine1, X. J. Wang2, M. Babzien2, I. Ben-Zvi2, M. Cornacchia3, H.-D. Nuhn3, R. Malone2, A. Murokh1, C. Pellegrini1, S. Reiche1, J. Rosenzweig1, and V. Yakimenko2
1Department of Physics & Astronomy, UCLA, Los Angeles, California 90095
2Accelerator Test Facility, NSLS, BNL, Upton, New York 11973
3SSRL, SLAC, Stanford, California 94309
Received 20 September 2001; published 3 May 2002
Nonlinear harmonic radiation was observed using the VISA self-amplified, spontaneous emission (SASE) free-electron laser (FEL) at saturation. The gain lengths, spectra, and energies of the three lowest SASE FEL modes were experimentally characterized. The measured nonlinear harmonic gain lengths and center spectral wavelengths decrease with harmonic number, n, which is consistent with nonlinear harmonic theory. Both the second and third nonlinear harmonics energies are about 1% of the fundamental energy. These experimental results demonstrate for the first time the feasibility of using nonlinear harmonic SASE FEL radiation to produce coherent, femtosecond x rays.
©2002 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v88/e204801
DOI: 10.1103/PhysRevLett.88.204801
PACS: 41.60.Cr, 41.60.Ap, 41.85.Ja
[ Abstract | Previous article | Next article | Issue 20 ]
About PROLA | Terms and Conditions | Subscriptions | Search | Help
Content in PROLA © 2008 by The American Physical Society All rights reserved. PROLA™ is a trademark of The American Physical Society. Use of APS online journals implies that the user has read and agrees to the Terms and Conditions in the Subscription Agreement.