Extreme ultraviolet free electron laser seeded with high-order harmonic of Ti:sapphire laser.
The 13th harmonic of a Ti:sapphire (Ti:S) laser in the plateau region was injected as a seeding source to a 250-MeV free-electron-laser (FEL) amplifier. When the amplification conditions were fulfilled, strong enhancement of the radiation intensity by a factor of 650 was observed. The random and uncontrollable spikes, which appeared in the spectra of the Self-Amplified Spontaneous Emission (SASE) based FEL radiation without the seeding source, were found to be suppressed drastically to form to a narrow-band, single peak profile at 61.2 nm. The properties of the seeded FEL radiation were well reproduced by numerical simulations. We discuss the future precept of the seeded FEL scheme to the shorter wavelength region.
RIKEN, XFEL Project Head Office, Sayo, Hyogo, Japan.
Tadashi
T
Togashi
Eiji J
EJ
Takahashi
Katsumi
K
Midorikawa
Makoto
M
Aoyama
Koichi
K
Yamakawa
Takahiro
T
Sato
Atsushi
A
Iwasaki
Shigeki
S
Owada
Tomoya
T
Okino
Kaoru
K
Yamanouchi
Fumihiko
F
Kannari
Akira
A
Yagishita
Hidetoshi
H
Nakano
Marie E
ME
Couprie
Kenji
K
Fukami
Takaki
T
Hatsui
Toru
T
Hara
Takashi
T
Kameshima
Hideo
H
Kitamura
Noritaka
N
Kumagai
Shinichi
S
Matsubara
Mitsuru
M
Nagasono
Haruhiko
H
Ohashi
Takashi
T
Ohshima
Yuji
Y
Otake
Tsumoru
T
Shintake
Kenji
K
Tamasaku
Hitoshi
H
Tanaka
Takashi
T
Tanaka
Kazuaki
K
Togawa
Hiromitsu
H
Tomizawa
Takahiro
T
Watanabe
Makina
M
Yabashi
Tetsuya
T
Ishikawa