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Sugita, Akihiro; Yokoyama, Keiichi; Yamada, Hidetaka; Inoue, Norihiro*; Aoyama, Makoto; Yamakawa, Koichi
Japanese Journal of Applied Physics, Part 1, 46(1), p.226 - 228, 2007/01
Times Cited Count：7 Percentile：30.11(Physics, Applied)Generation of broadband mid-infrared (MIR) laser pulses by difference frequency mixing (DFM) is reported. Two-color femtosecond pulses from a Ti: Sapphire laser system is mixed in an AgGaS
crystal utilizing a noncollinear phase matching scheme. The relative bandwidth of the generated MIR pulse has been measured to be 23 % to the central frequency, the broadest in DFM-based MIR sources reported so far. It is found that the type-I crystal can give broader phase matching range of spectrum than the type-II crystal within this scheme.
Inoue, Naoko; Hori, Keiichiro; Dosho, Hisaharu; Ota, Kiyokazu*; Otsuka, Naoto; Aso, Ryoji; Senzaki, Masao
Proceedings of INMM 47th Annual Meeting (CD-ROM), 6 Pages, 2006/00
no abstracts in English
) and Cs(7
) by femtosecond laser pulsesYamada, Hidetaka; Yokoyama, Keiichi; Teranishi, Yoshiaki*; Sugita, Akihiro; Shirai, Toshizo*; Aoyama, Makoto; Akahane, Yutaka; Inoue, Norihiro*; Ueda, Hideki*; Yamakawa, Koichi; et al.
Physical Review A, 72(6), p.063404_1 - 063404_5, 2005/12
Times Cited Count：6 Percentile：31.21(Optics)A demonstration of coherent quantum control for ultrafast precise selection of closely-lying states is reported. A phase-locked pair of femtosecond laser pulses is generated through a pulse shaper to excite the ground-state cesium atom to the Cs(7) and Cs(7) states by two-photon absorption. The excited state population is measured by detecting fluorescence from each spin-orbit state. By controlling the phase-difference of the pulse pair, an ultrafast precise selection is accomplished. The contrast ratio of the maximal to minimal selection ratio exceeds 10
with the delay less than 400 fs.
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：18.77(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.
Shibata, Keiichiro*; Maki, Koichi*; Inoue, Takashi*; Hanada, Masaya; Okumura, Yoshikazu; Yamashita, Y.*
Fusion Engineering and Design, 51-52, p.357 - 362, 2000/11
Times Cited Count：1 Percentile：12.1(Nuclear Science & Technology)no abstracts in English
Inoue, Takashi; Shibata, Keiichiro*; E.DiPietro*; Fujiwara, Yukio; R.S.Hemsworth*; E.Hodgson*; Iida, Hiromasa; A.Krylov*; P.L.Mondino*; Okumura, Yoshikazu; et al.
Fusion Technology 1998, 1, p.411 - 414, 1998/00
no abstracts in English
Inoue, Daiei*; Honsho, Shizumitsu*; Tanaka, Kazuhiro*; Ueda, Keiichi*
JNC TJ1420 98-024, 73 Pages, 1990/06
None
Oki, Keiichi; Murayama, Yoji; Sasajima, Fumio; Izumo, Hironobu; Inoue, Takeshi; Unesaki, Hironobu*
no journal, ,
no abstracts in English
Kambara, Wataru; Aoyama, Kazuhiro; Yamauchi, Yasuhiro; Iwahashi, Takaaki; Ono, Shino; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Shibata, Kaoru; Nakajima, Kenji; Kawamura, Seiko; et al.
no journal, ,
堀 啓一郎; 井上 尚子; 中村 博文; 勝山 幸三; 石見 明洋
深澤 哲生*; 星野 国義*; 佐藤 記徳*; 矢澤 紀子*; 中村 友隆*
JP, 2015-090369 
Patent licensing information Patent publication (In Japanese)
【課題】燃料デブリを対象としたX線CT装置の利用により核物質量を計測することを可能とする破損・溶融燃料含有物質中の核物質量の計測装置及び計測方法を提供する。 【解決手段】燃料デブリを収納した燃料デブリ収納容器に対してX線を回転走査しながら照射して前記燃料デブリ収納容器を透過したX線を検知し、燃料デブリの密度の情報を得る第1の測定部と、燃料デブリ収納容器からの放射線を測定する第2の測定部と、第2の測定部で測定した放射線を第1の測定部で測定した燃料デブリの密度により補正し、補正後の放射線から燃料デブリの核物質量を定める処理部により構成されたことを特徴とする。
