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Journal Articles

Structure of superconducting Ca-intercalated bilayer Graphene/SiC studied using total-reflection high-energy positron diffraction

Endo, Yukihiro*; Fukaya, Yuki; Mochizuki, Izumi*; Takayama, Akari*; Hyodo, Toshio*; Hasegawa, Shuji*

Carbon, 157, p.857 - 862, 2020/02

 Times Cited Count:1 Percentile:35.35(Chemistry, Physical)

no abstracts in English

JAEA Reports

Gas composition related to the Horonobe Underground Research Laboratory Project

Miyakawa, Kazuya; Tamamura, Shuji*; Nakata, Kotaro*; Hasegawa, Takuma*

JAEA-Data/Code 2016-021, 60 Pages, 2017/03

JAEA-Data-Code-2016-021.pdf:3.87MB
JAEA-Data-Code-2016-021-appendix(CD-ROM).zip:0.45MB

The Japan Atomic Energy Agency has been involved in ongoing research in the Horonobe area for the purposes of geoscientific research, and research and development (R&D) on technologies to be used for the geological disposal of high-level radioactive waste. The chemistry of groundwater and dissolved gas from deep boreholes has been obtained since H13 fiscal year for R&D on technologies related to geological characterization. Horonobe Research Institute for the Subsurface Environment (H-RISE) has investigated a resources development on promoting effective use of coal bed buried in Hokkaido including the Horonobe area using microbial communities. The data of dissolved gas from the Horonobe groundwater have also been obtained along with the microbiological research by H-RISE. Central Research Institute of Electric Power Industry (CRIEPI) has conducted R&D on technology of groundwater geochronology which is one of technologies to be used for the geological disposal, and noble gas data from the Horonobe groundwater have been obtained by CRIEPI. This report shows a data set which comprises gas data obtained from the Horonobe underground research project during the period from H13 fiscal year to H27 fiscal year.

Journal Articles

Atomic and electronic structures of Si(111)-$$sqrt{21}timessqrt{21}$$ superstructure

Fukaya, Yuki; Kubo, Keisuke*; Hirahara, Toru*; Yamazaki, Shiro*; Choi, W. H.*; Yeom, H. W.*; Kawasuso, Atsuo; Hasegawa, Shuji*; Matsuda, Iwao*

e-Journal of Surface Science and Nanotechnology (Internet), 10, p.310 - 314, 2012/07

no abstracts in English

Journal Articles

Atomic structure of two-dimensional binary surface alloys; Si(111)-$$sqrt{21}timessqrt{21}$$ superstructure

Fukaya, Yuki; Matsuda, Iwao*; Hashimoto, Mie*; Kubo, Keisuke*; Hirahara, Toru*; Yamazaki, Shiro*; Choi, W. H.*; Yeom, H. W.*; Hasegawa, Shuji*; Kawasuso, Atsuo; et al.

Surface Science, 606(11-12), p.919 - 923, 2012/06

 Times Cited Count:6 Percentile:67.28(Chemistry, Physical)

no abstracts in English

Journal Articles

Electron compound nature in a surface atomic layer of a two-dimensional hexagonal lattice

Matsuda, Iwao*; Nakamura, Fumitaka*; Kubo, Keisuke*; Hirahara, Toru*; Yamazaki, Shiro*; Choi, W. H.*; Yeom, H. W.*; Narita, Hisashi*; Fukaya, Yuki; Hashimoto, Mie*; et al.

Physical Review B, 82(16), p.165330_1 - 165330_6, 2010/10

 Times Cited Count:9 Percentile:55.3(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Design of the toroidal field coil for A-SSTR2 using high Tc superconductor

Ando, Toshinari; Kato, Takashi; Ushigusa, Kenkichi; Nishio, Satoshi; Kurihara, Ryoichi; Aoki, Isao; Hamada, Kazuya; Tsuji, Hiroshi; Hasegawa, Mitsuru*; Naito, Shuji*

Fusion Engineering and Design, 58-59, p.13 - 16, 2001/11

 Times Cited Count:9 Percentile:41.46(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Fast Z-pinch optical guiding for laser wakefield acceleration

Hosokai, Tomonao; Kando, Masaki; Dewa, Hidenori; Kotaki, Hideyuki; Kondo, Shuji; Hasegawa, Noboru; Horioka, Kazuhiko*; Nakajima, Kazuhisa

Nuclear Instruments and Methods in Physics Research A, 455(1), p.155 - 160, 2000/11

 Times Cited Count:1 Percentile:79.45(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Optical guiding of intense laser pulses by fast Z-pinch discharge

Hosokai, Tomonao; Kando, Masaki; Dewa, Hidenori; Kotaki, Hideyuki; Kondo, Shuji; Hasegawa, Noboru; Kanazawa, Shuhei; Nakajima, Kazuhisa*; Horioka, Kazuhiko*

Denki Gakkai Rombunshi, A, 120(5), p.575 - 582, 2000/05

no abstracts in English

JAEA Reports

None

*; Miyamoto, Shuji*; *; *; *; Hasegawa, Makoto; Yamazaki, Yoshio

JNC-TY9400 2000-008, 20 Pages, 2000/03

JNC-TY9400-2000-008.pdf:0.81MB

no abstracts in English

Journal Articles

Optical guidance of terrawatt laser pulses by the implosion phase of a fast Z-pinch discharge in a gas-filled capillary

Hosokai, Tomonao*; Kando, Masaki*; Dewa, Hidenori*; Kotaki, Hideyuki; Kondo, Shuji; Hasegawa, Noboru; Nakajima, Kazuhisa*; Horioka, Kazuhiko*

Optics Letters, 25(1), p.10 - 12, 2000/01

 Times Cited Count:120 Percentile:3.17(Optics)

no abstracts in English

Oral presentation

High-order harmonic comb from relativistic electron spikes

Pirozhkov, A. S.; Kando, Masaki; Esirkepov, T. Z.; Pikuz, T.; Faenov, A. Ya.*; Ogura, Koichi; Hayashi, Yukio; Kotaki, Hideyuki; Ragozin, E. N.*; Neely, D.*; et al.

no journal, , 

Oral presentation

On-axis and off-axis high order harmonics generation by relativistic laser in gas jet target

Pirozhkov, A. S.; Kando, Masaki; Esirkepov, T. Z.; Pikuz, T.; Faenov, A. Ya.*; Ogura, Koichi; Hayashi, Yukio; Kotaki, Hideyuki; Ragozin, E. N.*; Neely, D.*; et al.

no journal, , 

Oral presentation

High-order harmonics from relativistic electron spikes

Pirozhkov, A. S.; Kando, Masaki; Esirkepov, T. Z.; Pikuz, T.; Faenov, A. Ya.*; Ogura, Koichi; Hayashi, Yukio; Kotaki, Hideyuki; Ragozin, E. N.*; Neely, D.*; et al.

no journal, , 

Oral presentation

Source structure of high-order harmonics from relativistic electron spikes

Pirozhkov, A. S.; Kando, Masaki; Esirkepov, T. Z.; Pikuz, T.; Faenov, A. Ya.*; Ogura, Koichi; Hayashi, Yukio; Kotaki, Hideyuki; Ragozin, E. N.*; Neely, D.*; et al.

no journal, , 

Oral presentation

High-resolution XUV imaging of catastrophes in relativistic plasma

Pirozhkov, A. S.; Kando, Masaki; Esirkepov, T. Z.; Pikuz, T.; Faenov, A. Ya.*; Ogura, Koichi; Hayashi, Yukio; Kotaki, Hideyuki; Ragozin, E. N.*; Neely, D.*; et al.

no journal, , 

Oral presentation

Development of a high-average-power small-scale Nd:YAG laser system for tunnel inspection

Mikami, Katsuhiro; Hasegawa, Noboru; Okada, Hajime; Kondo, Shuji; Kawachi, Tetsuya

no journal, , 

An outdoor-use laser system to improve the performances of existing tunnel inspection techniques is studied. One of the typical concepts is that the blow by hammer in routine hammering test is replaced by the laser pulse irradiation. This new laser system is required to provide high average output power (5 J, 50 Hz, $$sim$$15 ns) with a compact geometry enough to mount on the inspection vehicle (4.2 m $$times$$ 0.8 m). Dramatic speed-up of the inspection is expected by the combination of this new laser system and a laser scanning frequency measurement system.

Oral presentation

Development of a high-average-power compact Nd:YAG laser system for infrastructure inspection

Mikami, Katsuhiro; Hasegawa, Noboru; Okada, Hajime; Kondo, Shuji; Kawachi, Tetsuya

no journal, , 

An outside-use laser system to improve the performances of existing tunnel inspection techniques is studied. One of the typical concepts is that the blow by hammer in routine test is replaced by the laser pulse irradiation. This new laser system is required to provide high average output power (5 J, 50 Hz, $$sim$$15 ns) with a small-scale geometry enough to mount on the inspection vehicle (4.2 m $$times$$ 0.8 m). In this presentation, we will report a potential to demonstrate 5 J output.

Oral presentation

Development of a high-average-power small-scale Nd:YAG laser system for infrastructure inspection

Mikami, Katsuhiro; Hasegawa, Noboru; Okada, Hajime; Kondo, Shuji; Kawachi, Tetsuya

no journal, , 

An outdoor-use laser system to improve the performances of existing tunnel inspection techniques is studied. One of the typical concepts is that the blow by hammer in routine hammering test is replaced by the laser pulse irradiation. This new laser system is required to provide high average output power (5 J, 50 Hz, $$sim$$15 ns) with a compact geometry enough to mount on the inspection vehicle (4.2 m $$times$$ 0.8 m). Dramatic speed-up of the inspection is expected by the combination of this new laser system and a laser scanning frequency measurement system.

Oral presentation

Development of the high speed inspection system of defects inside concrete

Mikami, Katsuhiro; Kurahashi, Shinri*; Kitamura, Toshiyuki*; Hasegawa, Noboru; Okada, Hajime; Kondo, Shuji; Kotyaev, O.*; Shimada, Yoshinori*; Kawachi, Tetsuya

no journal, , 

A lot of infrastructure constructions were built in the 1940s and 1950s in Japan and these decrepitude are seriously concerned that leading to a serious accident. Recently, a novel inspection method using laser systems which consists of impact laser and detection laser, is energetically developing because of its significant advantages. A role of the impact laser is to induce the vibration on concrete walls by the high energy laser pulse behaving like hammering. Then, the detection laser set in laser differential interferometer that which detects the vibration of the concrete surface. For putting into actual utilization, the inspection speed which is about several ten meters per night should be improved for the exceedingly-long train-tunnels. The inspection speed of impact laser and detection systems is required a high-frequency measurement. In this study, we developed a new prototype inspection system to realize high speed inspection for defects inside concrete.

Oral presentation

Structural analysis of Li-intercalated bilayer graphene on SiC studied by total-reflection high-energy positron diffraction

Endo, Yukihiro*; Mochizuki, Izumi*; Fukaya, Yuki; Takayama, Akari*; Hyodo, Toshio*; Hasegawa, Shuji*

no journal, , 

no abstracts in English

Oral presentation

Development of the novel maintenance conservation method for infrastructures by using the laser technology

Hasegawa, Noboru*; Nishikino, Masaharu*; Mikami, Katsuhiro*; Okada, Hajime*; Kondo, Shuji*; Kawachi, Tetsuya*; Shimada, Yoshinori*; Kurahashi, Shinri*; Kitamura, Toshiyuki*; Kotyaev, O.*; et al.

no journal, , 

no abstracts in English

21 (Records 1-20 displayed on this page)