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Yamagiwa, Mitsuru; Bulanov, S. V.*; Esirkepov, T. Z.*; Koga, J. K.; Kando, Masaki; Ueshima, Yutaka; Saito, Kanji; Wakabayashi, Daisuke*
Laser Physics, 16(2), p.252 - 258, 2006/02
Times Cited Count：2 Percentile：12.87(Optics)no abstracts in English
Kansai Research Establishment
JAERI-Conf 2005-004, 243 Pages, 2005/06
JAERI-Conf-2005-004.pdf:16.74MB
This report consists of 55 contributed papers of the 6th Symposium on Advanced Photon Research, which was held at JAERI-Kansai in Kyoto on November 4-5, 2004. The numbers of speeches were 16, including 5 invited speeches and the numbers of poster presentations were 56, including the report of presentations and cooperative research and joint research performed in FY2003.
Yokoyama, Keiichi; Teranishi, Yoshiaki; Toya, Yukio; Shirai, Toshizo; Fukuda, Yuji; Aoyama, Makoto; Akahane, Yutaka; Inoue, Norihiro*; Ueda, Hideki; Yamakawa, Koichi; et al.
Journal of Chemical Physics, 120(20), p.9446 - 9449, 2004/05
Times Cited Count：6 Percentile：18.51(Chemistry, Physical)Optimal laser control for ultrafast selection of closely-lying excited states, whose energy separation is smaller than the laser bandwidth, is reported on the two-photon transition of atomic cesium; Cs(6S 
7D
, J = 5/2 and 3/2). Selective excitation was carried out by pulse shaping of ultrashort laser pulses which were adaptively modulated in a closed-loop learning system handling eight parameters representing the electric field. Two-color fluorescence from the respective excited states was monitored to measure the selectivity. The fitness used in the learning algorithm was evaluated from the ratio of the fluorescence yield. After fifty generations, a pair of nearly transform-limitted pulses were obtained as an optimal pulse shape, proving the effectiveness of "Ramsey fringes" mechanism. The contrast of the selection ratio was improved by 
30 % from the simple "Ramsey fringes" experiment.
Hajima, Ryoichi; Nagai, Ryoji
Physical Review Letters, 91(2), p.024801_1 - 024801_4, 2003/07
Times Cited Count：39 Percentile：81.51(Physics, Multidisciplinary)We study the generation of a self-chirped optical pulse in an FEL oscillator. In a high-gain FEL oscillator, frequency chirp is induced in the slippage region as a result of superradiant FEL resonance, and this time-frequency correlation evolves continuously into a few-cycle regime, if the optical cavity length is perfectly synchronized to the electron bunch interval. Numerical simulations based on slowly-evolving-wave-approximation (SEWA) and experimental results are presented.
Utsumi, Takayuki*; Sasaki, Akira; Fujii, Sadao*
Keisan Kogaku Koenkai Rombunshu, 5, 4 Pages, 2000/05
no abstracts in English
Utsumi, Takayuki*; Sasaki, Akira; Kunugi, Tomoaki*; Fujii, Sadao*; Akamatsu, Mikio*
Proceedings of 13th International Conference on High-Power Particle Beams (BEAMS 2000) (CD-ROM), 4 Pages, 2000/00
no abstracts in English
; Sasaki, Akira; Kunugi, Tomoaki*; ;
Computational Fluid Dynamics Journal, 8(1), p.128 - 134, 1999/04
no abstracts in English
; Sasaki, Akira; Kunugi, Tomoaki*; ;
Inst. Phys. Conf. Ser., (159), p.451 - 454, 1999/00
no abstracts in English
Kansai Research Establishment
JAERI-Conf 98-004, 189 Pages, 1998/03
no abstracts in English
