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Results of the VISA SASE FEL experiment at 840nm

2003; Elsevier BV; Volume: 507; Issue: 1-2 Linguagem: Inglês

10.1016/s0168-9002(03)00957-4

1872-9576

A. Murokh, R. Agustsson, M. Babzien, I. Ben‐Zvi, L. Bertolini, K. van Bibber, R. Carr, M. Cornacchia, P. Frigola, J. Hill, E. Johnson, L. Klaisner, G. Le Sage, M. Libkind, R. Malone, H.-D. Nuhn, C. Pellegrini, S. Reiche, G. Rakowsky, J. B. Rosenzweig, R. Rüland, J. Skaritka, A. Toor, A. Tremaine, Xijie Wang, V. Yakimenko,

Laser-Plasma Interactions and Diagnostics

VISA (Visible to Infrared SASE Amplifier) is a high-gain self-amplified spontaneous emission FEL, which achieved saturation at 840 nm within a single-pass 4-m undulator. A gain length shorter than 18 cm has been obtained, yielding the gain of 2×108 at saturation. The FEL performance, including spectral, angular, and statistical properties of SASE radiation, has been characterized for different electron beam conditions. The results are compared to 3-D SASE FEL theory and start-to-end numerical simulations of the entire injector, transport, and FEL system. Detailed agreement between simulations and experimental results is obtained over the wide range of the electron beam parameters.