Zobrazeno 1 - 10
of 289
pro vyhledávání: '"Shuichi Takamura"'
Autor:
K. Fujita, Yoshihiko Uesugi, H. Iwata, Shiro Maenaka, T. Aota, Yusuke Kikuchi, Shuichi Takamura
Publikováno v:
Applied Surface Science. 487:755-765
Black silicon formed by helium plasma irradiation has attractive surface morphologies in terms of solar cell fabrication, because it has good photon absorption property across the solar spectrum. It also does not need any masking process, which is so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5801ee454bd247eae0ccbe5cba8dee3
https://doi.org/10.1016/j.apsusc.2019.05.034
https://doi.org/10.1016/j.apsusc.2019.05.034
Autor:
Masayoshi Nagata, Yoshihiko Uesugi, Hiroaki Kurishita, Shiro Maenaka, K. Fujita, K. Yamada, Yusuke Kikuchi, T. Kobayashi, Shuichi Takamura
Publikováno v:
Surfaces and Interfaces. 9:44-50
Fiber-form nanostructures grown on tungsten (W) surfaces with helium (He) plasma irradiation exhibit an excellent thermal radiative property at low sample temperatures up to 1200 °C. To maintain this radiative property at higher temperatures, the re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::790bd1521787d74e1f559481970c7043
https://doi.org/10.1016/j.surfin.2017.07.005
https://doi.org/10.1016/j.surfin.2017.07.005
Publikováno v:
Nuclear Materials and Energy, Vol 12, Iss, Pp 297-301 (2017)
The Particle-In-Cell simulation code PICS has been developed to study plasma in front of a surface with two types of masks, step-type and roof-type. Parameter scans with regard to magnetic field angle, electron density, and mask height were carried o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8a802c8745ae26b1114e5353badcc8a
https://doi.org/10.1016/j.nme.2016.12.017
https://doi.org/10.1016/j.nme.2016.12.017
Publikováno v:
Contributions to Plasma Physics. 56:681-686
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be44545c78f792325c22562a819cfb06
https://doi.org/10.1002/ctpp.201610061
https://doi.org/10.1002/ctpp.201610061
Autor:
Yoshihiko Uesugi, K. Fujita, Shiro Maenaka, T. Aota, M. Sakao, Shuichi Takamura, H. Iwata, M. Yamashita
Publikováno v:
Materialia. 9:100564
Growth mechanisms of complex tungsten (W) fuzzy nanostructure on helium-plasma-irradiated W surface have been extensively studied since the discovery of the phenomenon in 2006. However, the growth process of complicated W nano-fibers from the atomist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0e1e471b5b8528c8590df5e6db90424
https://doi.org/10.1016/j.mtla.2019.100564
https://doi.org/10.1016/j.mtla.2019.100564
Autor:
Shuichi Takamura
Publikováno v:
Journal of Nuclear Materials. 466:239-242
The radiative cooling capability of tungsten with a fiber-form nanostructure is evaluated precisely using an electron-beam power system. It is found that the total emissivity of black nanostructured tungsten is very close to 1.0, meaning an almost co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7a061d84743eb8c1611b85cdfe96709
https://doi.org/10.1016/j.jnucmat.2015.08.008
https://doi.org/10.1016/j.jnucmat.2015.08.008
Autor:
Yoshihiko Uesugi, Shuichi Takamura
Publikováno v:
Applied Surface Science. 356:888-897
The initial stage of fiber-form nanostructure growth on metal surface with helium plasma irradiation is illustrated, taking recent research knowledge using a flux gradient technique, and including loop-like nano-scale structure as precursors. The gro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76c2ab96edd3d27f842c9499323c74b3
https://doi.org/10.1016/j.apsusc.2015.08.112
https://doi.org/10.1016/j.apsusc.2015.08.112
Autor:
Arimichi Takayama, Mitsutaka Miyamoto, Tatsunori Hattori, Ryo Kobayashi, Yasuyuki Noiri, Shin Kajita, Shuji Ogata, Takahiro Murashima, Hiroaki Nakamura, Yoshihide Yoshimoto, Seiki Saito, Y. Oda, Tomoyuki Tamura, Noriyasu Ohno, Atsushi Ito, Miyuki Yajima, Shuichi Takamura
Publikováno v:
Journal of Nuclear Materials. 463:109-115
The generation of tungsten fuzzy nanostructure by exposure to helium plasma is one of the important problems for the use of tungsten material as divertor plates in nuclear fusion reactors. In the present paper, the formation mechanisms of the helium
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::615a3b5b9c53a1a3038a0afb3162c0ee
https://doi.org/10.1016/j.jnucmat.2015.01.018
https://doi.org/10.1016/j.jnucmat.2015.01.018
Autor:
Shuichi Takamura
Publikováno v:
Journal of Nuclear Materials. 463:325-328
Power transmission factor (PTF) through the sheath of deuterium plasmas with hot electron component on virgin as well as nanostructured tungsten due to helium pre-irradiations are studied experimentally and compared with a PTF theory. PTF for nanostr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::322681394d43da92d6502b352d401a58
https://doi.org/10.1016/j.jnucmat.2014.09.060
https://doi.org/10.1016/j.jnucmat.2014.09.060
Publikováno v:
Contributions to Plasma Physics. 54:474-478
Power transmission factors (PTF) through the sheath of helium plasmas with hot electron component against two kinds of tungsten wall, virgin as well as nanostructured one due to helium irradiation are studied theoretically and experimentally. In the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed1c5120aba5f55c6a1ec64bf6f414af
https://doi.org/10.1002/ctpp.201410016
https://doi.org/10.1002/ctpp.201410016