JOPSS - Search Results

Oral presentation

Performance evaluation of cold-neutron disk-chopper spectrometer AMATERAS

Nakajima, Kenji; Kawamura, Seiko; Nakamura, Mitsutaka; Kajimoto, Ryoichi; Inamura, Yasuhiro; Takahashi, Nobuaki; Osakabe, Toyotaka; Wakimoto, Shuichi; Aizawa, Kazuya; Suzuya, Kentaro; et al.

no journal, ,

AMATERAS is a cold-neutron disk-chopper spectrometer newly installed at MLF, J-PARC. The spectrometer has pulse shaping chopper which can cat the source pulse shape as it is required by the experiments. By using newly developed high-speed disk-choppers, the spectrometer realizes both high energy resolution and high intensity with high flexibility in the cold and thermal neutron energy region. The construction of the spectrometer has been completed in spring of 2009. After the commissioning works, now the spectrometer is open to users. In this presentation, we will show the evaluated performances which were obtained in commissioning works.

Oral presentation

Control and pulsewidth measurement of laser-accelerated electron beams

Kotaki, Hideyuki; Hayashi, Yukio; Kawase, Keigo; Mori, Michiaki; Kando, Masaki; Homma, Takayuki; Koga, J. K.; Daido, Hiroyuki; Bulanov, S. V.

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no abstracts in English

Oral presentation

Proposal of the measurement method of X-ray flux of XFEL irradiating bio-molecules

Moribayashi, Kengo

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no abstracts in English

Oral presentation

XUV light generation with relativistic flying mirror via counter-propagating laser pulses, 1

Kawase, Keigo; Kando, Masaki; Pirozhkov, A. S.; Homma, Takayuki; Kameshima, Takashi*; Daito, Izuru; Hayashi, Yukio; Kotaki, Hideyuki; Fukuda, Yuji; Esirkepov, T. Z.; et al.

no journal, ,

Relativistic flying mirror experiment is performed by using a high-intense Ti:Sapphire laser with the energy of 520 mJ and the pulse duration of 30 fs at KPSI-JAEA. In this experiment, we observe the generation of XUV lights, and it intensity is in good agreement with the theoretical estimation. We will report the abstract of this study and the detail of the experimental procedure in this meeting.

Oral presentation

Design and test of 2-4MHz pulsed- beams for measurement of $^{12}$ C() reaction

Niki, Kazuaki*; Arai, Shigeaki*; Ishiyama, Hironobu*; Okada, Masayuki*; Makii, Hiroyuki; Miyatake, Hiroari; Watanabe, Yutaka*

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no abstracts in English

Oral presentation

Microscopic nuclear level densities with the Skyrme-Hartree-Fock method

Minato, Futoshi

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no abstracts in English

Oral presentation

NMR study of clean URuSi single crystal

Kambe, Shinsaku; Tokunaga, Yo; Sakai, Hironori; Chudo, Hiroyuki; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika

no journal, ,

In URuSi, the electronic property at low temperatures is strongly depends on the quality of sample. Thus, it is necessary to use a very high quality single crystal sample in order to clarify the intrinsic properties. We have succeeded in preparing a very pure single crystal with very small residual resistivity. We report NMR characterization of this sample.

Oral presentation

Direction dependence of electron excitation in dielectrics by short pulse laser

Otobe, Tomohito

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I solve the time-dependent Khon-Sham equation by real-time and -space method to simulate the electron excitation by intense short pulse laser. I found that the electron excitation possibility is changed as rotating the direction of polarization to the crystal. My simulation indicates that this change of electron excitation probability is depends on the change of the region of electron excitation in Bloch phase space. This result indicates also the probe of small region of the crystalline solid and control of electron excitation process by laser field.

Oral presentation

Laser ion acceleration via dipole vortex formation

Nakamura, Tatsufumi; Esirkepov, T. Z.; Koga, J. K.; Bulanov, S. V.

no journal, ,

Laser ion acceleration has been intensively studied in may institute from the perspective of medical applications. One of the critical issue is to enhance the accelerated ion energy. For that purpose, using a near-critical density target is considered to be beneficial due to the high coupling of laser energy to plasmas. In this research, we studied ion acceleration by using formation of dipole magnetic vortex. The behavior of dipole vortex is complicated, but by controlling them, intense electric field could be induced inside the plasma. We show how to control them and obtain the energy scaling by vortex acceleration.

Oral presentation

Analysis of deuteron induced incomplete fusion reactions on heavy targets with continuum-discretized coupled-channels method

Hashimoto, Shintaro; Ogata, Kazuyuki*; Chiba, Satoshi; Yahiro, Masanobu*

no journal, ,

no abstracts in English

Oral presentation

Development of soft-X-ray laser probe system for investigating dynamics on solid surfaces

Ochi, Yoshihiro; Terakawa, Kota*; Suemoto, Toru*; Kawachi, Tetsuya; Tomita, Takuro*; Yamamoto, Minoru*; Deki, Manato*; Hasegawa, Noboru; Oba, Toshiyuki; Kaihori, Takeshi

no journal, ,

no abstracts in English

Oral presentation

Investigation of muon atomic capture ratio between cupper and tin in bronze

Ninomiya, Kazuhiko; Nagatomo, Takashi*; Kubo, Kenya*; Kita, Makoto*; Shinohara, Atsushi*; Ito, Takashi; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; et al.

no journal, ,

We determined muon capture probability for cupper, tin and lead atoms in bronze from muonic X-ray measurement. We also performed muon irradiation for old Chinese coin and determined contents of this sample.

Oral presentation

Coexistence of the staggered magnetization, dimerization, and chiral order in the magnetization plateau of the spin tube

Sakai, Toru; Sato, Masahiro*; Okunishi, Koichi*; Okamoto, Kiyomi*; Itoi, Chigaku*

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no abstracts in English

Oral presentation

Charge transfer cross section of dysprosium

Shibata, Takemasa; Ogura, Koichi; Koike, Fumihiro*

no journal, ,

Symmetric charge transfer of dysprosium has two reaction paths which are resonant and non-resonant due to open shells of f electrons inside 6s electrons. Formerly, we calculated the cross sections by assuming that the resonant and non-resonant reactions proceed independently in proportion to their statistical weights. However, this assumption is not correct because there are transitions between the resonant and non-resonant states. In the present paper, the cross sections of dysprosium was calculated considering interactions among all resonant and non-resonant states in the impact-parameter method. It was found that the cross sections are much larger than those calculated on the assumption of the independence of the resonant and non-resonant reactions and slightly small compared with the usual symmetric resonance charge transfer. Moreover, the calculated cross sections are very close to the measured values.

Oral presentation