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Fujita, Ayumi
Physical Review B, 64(6), p.064504_1 - 064504_6, 2001/08
Times Cited Count：0 Percentile：0(Materials Science, Multidisciplinary)We study parametric level statistics of the discretized excitation spectra inside a moving vortex core in layered superconductors with impurities. The universal conductivity is evaluated numerically for the various values of rescaled vortex velocities 
from the clean case to the dirty limit case. The random matrix theoretical prediction is verified numerically in the large regime. On the contrary in the low velocity regime, we observe 
which is consistent with the theoretical result for the super-clean case, where the energy dissipation is due to the Landau-Zener transition which takes place at the points called ``avoided crossing''.
Baba, Yuji; Wu, G.; Sekiguchi, Tetsuhiro; Shimoyama, Iwao
Journal of Vacuum Science and Technology A, 19(4), p.1485 - 1489, 2001/07
Times Cited Count：5 Percentile：26.32(Materials Science, Coatings & Films)no abstracts in English
)F) physisorbed on Cu(111) following Si K-shell excitationSekiguchi, Tetsuhiro; Baba, Yuji
Photon Factory Activity Report 1998, Part B, P. 261, 1997/11
no abstracts in English
Baba, Yuji; Yoshii, Kenji; Sasaki, Teikichi
Photon Factory Activity Report, (14), P. 146, 1996/00
no abstracts in English
following deep-core excitation at the K-edge; Relation between ion desorption and Auger decayBaba, Yuji; Yoshii, Kenji; Sasaki, Teikichi
Surface Science, 357-358, p.302 - 306, 1996/00
Times Cited Count：9 Percentile：49.93(Chemistry, Physical)no abstracts in English
Sasaki, Teikichi; Baba, Yuji; Yoshii, Kenji; Yamamoto, Hiroyuki
Photon Factory Activity Report, (13), P. 345, 1995/00
no abstracts in English
by core excitation around the K-edgeBaba, Yuji; Yoshii, Kenji; Sasaki, Teikichi
Photon Factory Activity Report, (13), P. 353, 1995/00
no abstracts in English
by 1s
resonant photoexcitationBaba, Yuji; Yoshii, Kenji; Yamamoto, Hiroyuki; Sasaki, Teikichi; W.Wurth*
Photon Factory Activity Report, (13), P. 354, 1995/00
no abstracts in English
Iwasaki, Akihisa*; Sawa, Naoki*; Matsubara, Shinichiro*; Kitamura, Seiji; Okamura, Shigeki*
no journal, ,
A fast reactor core consists of several hundred core elements, which are hexagonal flexible beams embedded at the lower support plate in a hexagonal arrangement, separated by small gaps, and immersed in a fluid. Core elements have no support for vertical fixing in order to avoid the influence of thermal expansion and swelling. These days, in Japan, larger earthquake vibrations are postulated in seismic evaluations. So, it is necessary to consider vertical displacements (rising) and horizontal displacements of the core elements simultaneously because vertical seismic vibrations are larger than the acceleration of gravity. The 3D vibration behavior is affected by the fluid force of the ambient coolant and contact with the surrounding core elements. In this study, single-model vibration tests using a full-scale test model were conducted, and the basic characteristics of 3D vibration behavior of the core element were examined. In addition, structures restricting vertical displacements (dashpot structure) were devised, and their effectiveness was verified. As a result of the tests, the effects of the ambient condition (in air, in static water, and in flowing water), gap between the pads, vibration directions, vibration waves, and dashpot structures on the vibration behavior of the core element were examined. As regards the ambient condition, the vertical displacements were larger in flowing water that simulates the coolant flow than in air and in static water, because of upward fluid force in flowing water. As regards the gap between the pads, the larger the gaps was, the stronger the interferences due to horizontal displacements, and the smaller the vertical displacements were. The dashpot structure was verified to be suitable for reducing vertical displacements.
