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Sai, Masataka; Hagiwara, Hiroki; Matsushima, Hiroyuki*; Noda, Masatoshi*; Noda, Masaru*; Ando, Kenichi*; Tanaka, Tatsuya*; Ueda, Tadashi*; Honda, Yuko*; Mizuno, Takashi
JAEA-Data/Code 2010-010, 75 Pages, 2010/09
JAEA-Data-Code-2010-010.pdf:2.5MB
This report compiles data set of the groundwater chemistry obtained at Mizunami Underground Research Laboratory (MIU) between the fiscal year 2004 and the fiscal year 2007. These data includes groundwater chemistry of inflow in the shafts and sampled groundwater in the boreholes, which drilled from sub-stages of MIU and from surface (MSB-2, MSB-4, and MIZ-1). Basic information (e.g. sampling location, sampling date, sampling method, analytical method) are also described in terms of quality control and traceability.
Mori, Michiaki; Kondo, Kiminori; Mizuta, Yoshio*; Kando, Masaki; Kotaki, Hideyuki; Nishiuchi, Mamiko; Kado, Masataka; Pirozhkov, A. S.; Ogura, Koichi; Sugiyama, Hironori*; et al.
Physical Review Special Topics; Accelerators and Beams, 12(8), p.082801_1 - 082801_5, 2009/08
Times Cited Count：23 Percentile：77.74(Physics, Nuclear)The pointing stability and divergence of a quasimonoenergetic electron bunch generated in a self-injected laser-plasma acceleration regime using 4 TW laser is studied. A pointing stability of 2.4 mrad root-mean-square (RMS) and a beam divergence of 10.6 mrad (RMS) were obtained using an argon gas-jet target for 50 sequential shots, while these values were degraded by a factor of three at the optimum condition using helium. The peak electron energies were 8.5
0.7 MeV and 24.83.6 MeV using argon and helium, respectively. The experimental results indicate that the different propagation condition could be generated with the different material, although it is performed with the same irradiation condition.
Hirahara, Kazuro*; Ozono, Mako*; Sagiya, Takeshi*; Hoso, Yoshinobu*; Wada, Yasuo*; Ando, Masataka*
Geodynamics of Atotsugawa Fault System, p.25 - 44, 2007/00
no abstracts in English
Tanaka, Hidemi*; Ito, Tanio*; Nohara, Tsuyoshi; Ando, Masataka*
Geodynamics of Atotsugawa Fault System, p.103 - 121, 2007/00
The Mozumi-Sukenobe fault, running ENE-WSW and dipping almost vertically, is one of the Atotsugawa right-lateral active faults in central Japan. A 500 m long horizontal tunnel was excavated across the Mozumi-Sukenobe fault, utilizing the pre-existing tunnel of the Kamioka Mine for geological and geophysical integrated research of the fault zones. In order to clarify the fault zone architecture and rock distribution, we have investigated the distribution across the tunnel and obtained samples directly from the tunnel. The following results were obtained by meso-and microscopic observations and mineralogical examination of fault rocks; (1) Two fracture zones (referred to as zones A and B) are distinguished. They are 15 and 50 m in thickness, respectively, composed of foliated fault breccia in a damaged zone and foliated fault gouge in the fault cores. The core-zones contain an 8 cm slip layer for zone A and several thin (10 cm) slip layers for zone B. (2) Most of the fault rocks obtained from the fault cores of the two fracture zones show a distinct foliated texture, which is clearly a product of cataclastic flow deformation. Very thin, ultra-fine grained slip layers, generated by seismic rapid slip, are also detected from fault core of zones A and B. The cross-cutting relationship between foliated and rapid slip textures indicate a repeated process of slow and rapid slips in zones A and B. (3) The results of mineral assemblage analysis show that these fault rocks are dominated by smectite clay minerals as well as by mica minerals and chlorite, all of which could be potential candidates for the main reason of the stable slip. Combining all these data, we conclude that the Mozumi-Sukenobe fault is activated by extremely slow frictional-viscous creep which releases crustal strain energy. However, stress would also be released by earthquakes based on the existence of earthquake slip surfaces in the fault cores of the Mozumi-Sukenobe fault.
Hayashi, Yukio; Fukumi, Atsushi*; Matsukado, Koji*; Mori, Michiaki; Kotaki, Hideyuki; Kando, Masaki; Chen, L.-M.; Daito, Izuru; Kondo, Shuji; Kanazawa, Shuhei; et al.
Radiation Protection Dosimetry, 121(2), p.99 - 107, 2006/12
Times Cited Count：16 Percentile：72.68(Environmental Sciences)The authors obtain a new equation to estimate the forward component of a photon dose which is generated through the interaction between a target and a short pulse high power laser. As the equation is quite simple, it is useful for calculating the photon dose. The equation shows that the photon dose is proportional to the electron temperature for the range of its temperature 
3 MeV, and proportional to square of the electron temperature for the range of its temperature 
3 MeV. The dose estimated with this method is roughly consistent with the result of Monte Carlo simulation. On someassumptions and corrections, it can reproduce experimental results obtained and the dose result calculated at other laboratories.
Mori, Michiaki; Kando, Masaki; Pirozhkov, A. S.; Hayashi, Yukio; Yogo, Akifumi; Yoshimura, Norihisa; Ogura, Koichi; Takai, Mamiko; Sagisaka, Akito; Orimo, Satoshi; et al.
Plasma and Fusion Research (Internet), 1(9), p.042_1 - 042_4, 2006/09
A new detection device for evaluating ion energy distributions for laser-plasma ion source is demonstrated. The Imaging Plate (IP) with no protective layer as ion detector device for the Thomson Parabola spectrometeris used. The Imaging Plate Thomson Parabola spectrometer (IPTPS) is applicable for the analysis of the energydistribution of the laser-driven ion beam using an opto-electric digitizing technique.
Tobita, Kenji; Nishio, Satoshi; Enoeda, Mikio; Sato, Masayasu; Isono, Takaaki; Sakurai, Shinji; Nakamura, Hirofumi; Sato, Satoshi; Suzuki, Satoshi; Ando, Masami; et al.
Fusion Engineering and Design, 81(8-14), p.1151 - 1158, 2006/02
Times Cited Count：124 Percentile：99.05(Nuclear Science & Technology)no abstracts in English
Debski, W.; Ando, Masataka
Acta Geophysica Polonica, 52(1), p.1 - 14, 2004/00
None
Debski, W.; Ando, Masataka; *; *
EGS-AGU-EUG Joint Assembly 2003, 0 Pages, 2003/02
GPS observations have been recognized as the valuable source of information about such processes like fault creeping, volcanic hazard mitigation, etc. However, it is limited to land observation only and there is a strong demand to extend it for measurements of a deformation of the ocean bottom crust beneath where the significant tectonic processes occur.This presentation discuss some aspects of the method which relays on the combination of the GPS positioning and the acoustic ranging techniques. The algorithm, called the Indirect Acoustic Location, is an application of the Bayesian inversion technique to the source location based on the measurement of acoustic wave travel times when receivers (ship) positions are known with the limited accuracy. The method allows the systematic estimation
Debski, W.; Ando, Masataka
American Geophysical Union 2002 Fall Meeting, P. F985 S61B-1128, 2002/12
The main drawback of the classical approach to seismic tomography is a lack of the robust method to estimate the accuracy of tomographic image. This difficulty can be overcome if the Bayesian inverse theory is applied to solve the tomography inverse problem. The method relies on the construction of the posterior probability over the space of all possible velocity images which gives the probability that a given model is the true one. Thus, it provides the mechanism to find not only estimators of the true velocity distribution, like the Maximum Likelihood or average models but also, to estimate the accuracy of the tomography imaging. However, as the tomography problems are highly dimensional, inspecting posterior probability requires Monte Carlo sampling. This paper presents the application
by means of X-ray lasersTai, R.; Namikawa, Kazumichi*; Kishimoto, Maki; Tanaka, Momoko; Sukegawa, Kota*; Hasegawa, Noboru; Kawachi, Tetsuya; Kado, Masataka; Lu, P.; Nagashima, Keisuke; et al.
Physical Review Letters, 89(25), p.257602_1 - 267602_4, 2002/12
Times Cited Count：40 Percentile：81.12(Physics, Multidisciplinary)no abstracts in English
; Ando, Masataka; *; *
American Geophysical Union 2002 Fall Meeting, P. F368, 2002/00
None
Debski, W.; Ando, Masataka
EGS02-A-02699, 0 Pages, 2002/00
None
; Ando, Masataka; *; *
Geophysical Research Letters, 30(6), p.8012_1 - 8012_4, 2002/00
Times Cited Count：17 Percentile：38.94(Geosciences, Multidisciplinary)None
Ando, Masataka
Seismogenic Process Monitoring, p.221 - 228, 2002/00
None
; Ando, Masataka; *; *
Sokuchigaku Kokusai Shimpojumu Kanazawa Nihon Sokuchigakkai Koenkai, p.13 - 14, 2002/00
None
Kumazawa, Mineo; Ando, Masataka; ; ; ; ;
JNC TN7400 2001-008, 235 Pages, 2001/03
JNC-TN7400-2001-008.pdf:49.69MB
None
Matsusue, Kazuyuki; Jin; Ando, Masataka
Bulletin of the Seismological Society of America, 90(6), p.1430 - 1445, 2001/00
Times Cited Count：32 Percentile：54.47(Geochemistry & Geophysics)None
Nishio, Satoshi; Ushigusa, Kenkichi; Ueda, Shuzo; Polevoi, A.*; Kurita, Genichi; Tobita, Kenji; Kurihara, Ryoichi; Hu, G.; Okada, Hidetoshi*; Murakami, Yoshiki*; et al.
JAERI-Research 2000-029, 105 Pages, 2000/10
JAERI-Research-2000-029.pdf:4.19MB
no abstracts in English
