Properties of the ultrashort gain length, self-amplified spontaneous emission free-electron laser in the linear regime and saturation.
VISA (Visible to Infrared SASE Amplifier) is a high-gain self-amplified spontaneous emission (SASE) free-electron laser (FEL), which achieved saturation at 840 nm within a single-pass 4-m undulator. The experiment was performed at the Accelerator Test Facility at BNL, using a high brightness 70-MeV electron beam. A gain length shorter than 18 cm has been obtained, yielding a total gain of 2 x 10(8) at saturation. The FEL performance, including the spectral, angular, and statistical properties of SASE radiation, has been characterized for different electron beam conditions. Results are compared to the three-dimensional SASE FEL theory and start-to-end numerical simulations of the entire injector, transport, and FEL systems. An agreement between simulations and experimental results has been obtained at an unprecedented level of detail.
Murokh
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A
UCLA Department of Physics and Astronomy, University of California, Los Angeles, California 90095-1547, USA.
Agustsson
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Babzien
M
M
Ben-Zvi
I
I
Bertolini
L
L
van Bibber
K
K
Carr
R
R
Cornacchia
M
M
Frigola
P
P
Hill
J
J
Johnson
E
E
Klaisner
L
L
Le Sage
G
G
Libkind
M
M
Malone
R
R
Nuhn
H-D
HD
Pellegrini
C
C
Reiche
S
S
Rakowsky
G
G
Rosenzweig
J
J
Ruland
R
R
Skaritka
J
J
Toor
A
A
Tremaine
A
A
Wang
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X
Yakimenko
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V