First observation of self-amplified spontaneous emission in a free-electron laser at 109 nm wavelength
We present the first observation of self-amplified spontaneous emission (SASE) in a free-electron laser (FEL) in the vacuum ultraviolet regime at 109 nm wavelength (11 eV). The observed free-electron laser gain (approximately 3000) and the radiation characteristics, such as dependency on bunch charge, angular distribution, spectral width, and intensity fluctuations, are all consistent with the present models for SASE FELs.
Saldin
EL
Institute of Nuclear Physics, Ul. Kawiory 26 a, 30-55 Krakow, Poland.
Sandner
W
Sanok
Z
Schlarb
H
Schmidt
G
Schmuser
P
Schneider
JR
Schneidmiller
EA
Schreiber
H
Schreiber
S
Schutt
P
Sekutowicz
J
Serafini
L
Sertore
D
Setzer
S
Simrock
S
Sonntag
B
Sparr
B
Stephan
F
Sytchev
VA
Tazzari
S
Tazzioli
F
Tigner
M
Timm
M
Tonutti
M
Trakhtenberg
E