title: First observation of self-amplified spontaneous emission in a free-electron laser at 109 nm wavelength
abstract: 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.
authors.affiliation: Institute of Nuclear Physics, Ul. Kawiory 26 a, 30-55 Krakow, Poland.
authors.initials: EL
authors.lastname: Saldin
authors.initials: W
authors.lastname: Sandner
authors.initials: Z
authors.lastname: Sanok
authors.initials: H
authors.lastname: Schlarb
authors.initials: G
authors.lastname: Schmidt
authors.initials: P
authors.lastname: Schmuser
authors.initials: JR
authors.lastname: Schneider
authors.initials: EA
authors.lastname: Schneidmiller
authors.initials: H
authors.lastname: Schreiber
authors.initials: S
authors.lastname: Schreiber
authors.initials: P
authors.lastname: Schutt
authors.initials: J
authors.lastname: Sekutowicz
authors.initials: L
authors.lastname: Serafini
authors.initials: D
authors.lastname: Sertore
authors.initials: S
authors.lastname: Setzer
authors.initials: S
authors.lastname: Simrock
authors.initials: B
authors.lastname: Sonntag
authors.initials: B
authors.lastname: Sparr
authors.initials: F
authors.lastname: Stephan
authors.initials: VA
authors.lastname: Sytchev
authors.initials: S
authors.lastname: Tazzari
authors.initials: F
authors.lastname: Tazzioli
authors.initials: M
authors.lastname: Tigner
authors.initials: M
authors.lastname: Timm
authors.initials: M
authors.lastname: Tonutti
authors.initials: E
authors.lastname: Trakhtenberg