Search

Your search keyword '"Hasuo, Masahiro"' showing total 183 results
Start Over Author "Hasuo, Masahiro"
183 results on '"Hasuo, Masahiro"'

59. A Collisional-Radiative Model for Hydrogen including Velocity Changing Collisions between Atoms and Protons

Author

10637705, 80456152, 40218433, Fujii, Keisuke, Shikama, Taiichi, Sawada, Keiji, Goto, Motoshi, Morita, Shigeru, Hasuo, Masahiro, 10637705, 80456152, 40218433, Fujii, Keisuke, Shikama, Taiichi, Sawada, Keiji, Goto, Motoshi, Morita, Shigeru, and Hasuo, Masahiro

Abstract

We develop a collisional-radiative model for calculating the velocity distributions of excited hydrogen atoms. In the model, the velocity distributions are approximated using linear combinations of several basis functions which are treated as discrete velocity states, and only charge exchange collisions with proton are considered as velocity changing collisions. The populations in the velocity and excited states are calculated under an assumption of a quasi-stationary state. With the model we derive the velocity distribution of the ground state atoms from that of excited atoms in the n = 3 level observed for an LHD plasma, where n is the principal quantum number. The mean kinetic energy of the ground state atoms is estimated to be 5.6 eV, which is 0.05 eV less than that of the n = 3 atoms.

Published
2011

60. Fe^[14+] and F^[e15]+ spatial distributions in LHD plasma observed with a multiple-viewing-chord extreme-ultraviolet spectrometer

Author

40218433, Yanagibayashi, Jun, Goto, Motoshi, Dong C.F., Morita, Shigeru, Hasuo, Masahiro, 40218433, Yanagibayashi, Jun, Goto, Motoshi, Dong C.F., Morita, Shigeru, and Hasuo, Masahiro

Abstract

We have observed Fe14+ (3s^2 ^1S_0 - 3s3p ^1P_1) and Fe15+ (3s ^2S1/2 - 3p ^2P_[3/2]) emissions from a LHD plasma with a space-resolved extreme-ultraviolet spectrometer. The observed intensity distributions against the viewing chord for the respective emissions are reconstructed to the emission flux distributions in the plasma against the normalized radius of the poloidal cross section with a maximum entropy method. Both of the emissions localize in the periphery region, and the Fe^[14+] emission is located outer side than that of Fe15+. We calculate the charge state distribution of Fe ions against the normalized radius assuming the ionization equilibrium at the electron temperature and density, which are measured by a Thomson scattering method. The calculated result is consistent with the experimental one.

Published
2011

62. This title is unavailable for guests, please login to see more information.

Author

Iwamae, Atsushi, Sakaue, Atsushi, Neshi, Nobuhiro, Yanagibayashi, Jun, Hasuo, Masahiro, Nakamura, Daisuke, Sawada, Keiji, Goto, Motosh, Morita, Shigeru, Iwamae, Atsushi, Sakaue, Atsushi, Neshi, Nobuhiro, Yanagibayashi, Jun, Hasuo, Masahiro, Nakamura, Daisuke, Sawada, Keiji, Goto, Motosh, and Morita, Shigeru

Published
2010

64. This title is unavailable for guests, please login to see more information.

Author

40218433, Iwamae, Atsushi, Sakaue, Atsushi, Neshi, Nobuhiro, Yanagibayashi, Jun, Hasuo, Masahiro, Nakamura, Daisuke, Sawada, Keiji, Goto, Motoshi, Morita, Shigeru, 40218433, Iwamae, Atsushi, Sakaue, Atsushi, Neshi, Nobuhiro, Yanagibayashi, Jun, Hasuo, Masahiro, Nakamura, Daisuke, Sawada, Keiji, Goto, Motoshi, and Morita, Shigeru

Published
2010

72. Edge and Core Impurity Transport Study with Spectroscopic Instruments in LHD

Author

Morita, Shigeru, Goto, Motoshi, Kobayashi, Masahiro, Muto, Sadatsugu, Chowdhuri, Malay Bikas, Dong Chunfeng, Zhou Hangyu, Cui Zhengying, Fujii, Keisuke, Furuzawa, Akihiro, Hasuo, Masahiro, Iwamae, Atsushi, Jie Yinxian, Koubiti, Mohammed, Sakurai, Ikuya, Tawara, Yuzuru, Wan Baonian, Wu Zhenwei, Yamaguchi, Naohiro, Morita, Shigeru, Goto, Motoshi, Kobayashi, Masahiro, Muto, Sadatsugu, Chowdhuri, Malay Bikas, Dong Chunfeng, Zhou Hangyu, Cui Zhengying, Fujii, Keisuke, Furuzawa, Akihiro, Hasuo, Masahiro, Iwamae, Atsushi, Jie Yinxian, Koubiti, Mohammed, Sakurai, Ikuya, Tawara, Yuzuru, Wan Baonian, Wu Zhenwei, and Yamaguchi, Naohiro

Published
2009

73. Edge and Core Impurity Transport Study with Spectroscopic Instruments in LHD

Author

10637705, 40218433, Morita, Shigeru, Goto, Motoshi, Kobayashi, Masahiro, Muto, Sadatsugu, Chowdhuri, Malay Bikas, Dong Chunfeng, Zhou Hangyu, Cui Zhengying, Fujii, Keisuke, Furuzawa, Akihiro, Hasuo, Masahiro, Iwamae, Atsushi, Jie Yinxian, Koubiti, Mohammed, Sakurai, Ikuya, Tawara, Yuzuru, Wan Baonian, Wu Zhenwei, Yamaguchi, Naohiro, 10637705, 40218433, Morita, Shigeru, Goto, Motoshi, Kobayashi, Masahiro, Muto, Sadatsugu, Chowdhuri, Malay Bikas, Dong Chunfeng, Zhou Hangyu, Cui Zhengying, Fujii, Keisuke, Furuzawa, Akihiro, Hasuo, Masahiro, Iwamae, Atsushi, Jie Yinxian, Koubiti, Mohammed, Sakurai, Ikuya, Tawara, Yuzuru, Wan Baonian, Wu Zhenwei, and Yamaguchi, Naohiro

Published
2009

92. Fe^[14+] and F^[e15]+ spatial distributions in LHD plasma observed with a multiple-viewing-chord extreme-ultraviolet spectrometer

Author

Yanagibayashi, Jun, Goto, Motoshi, Dong C.F., Morita, Shigeru, and Hasuo, Masahiro

Subjects
iron, periphery plasma, spatial distribution, Astrophysics::High Energy Astrophysical Phenomena, EUV spectrum, impurity, highly charged ion, LHD plasma
Abstract

We have observed Fe14+ (3s^2 ^1S_0 - 3s3p ^1P_1) and Fe15+ (3s ^2S1/2 - 3p ^2P_[3/2]) emissions from a LHD plasma with a space-resolved extreme-ultraviolet spectrometer. The observed intensity distributions against the viewing chord for the respective emissions are reconstructed to the emission flux distributions in the plasma against the normalized radius of the poloidal cross section with a maximum entropy method. Both of the emissions localize in the periphery region, and the Fe^[14+] emission is located outer side than that of Fe15+. We calculate the charge state distribution of Fe ions against the normalized radius assuming the ionization equilibrium at the electron temperature and density, which are measured by a Thomson scattering method. The calculated result is consistent with the experimental one.

Published
2011

93. A Collisional-Radiative Model for Hydrogen including Velocity Changing Collisions between Atoms and Protons

Author

Fujii, Keisuke, Shikama, Taiichi, Sawada, Keiji, Goto, Motoshi, Morita, Shigeru, and Hasuo, Masahiro

Subjects
velocity changing collision, spectroscopy, hydrogen atom, collisional-radiative model, charge exchange collision, Physics::Atomic Physics, LHD plasma, velocity distribution
Abstract

We develop a collisional-radiative model for calculating the velocity distributions of excited hydrogen atoms. In the model, the velocity distributions are approximated using linear combinations of several basis functions which are treated as discrete velocity states, and only charge exchange collisions with proton are considered as velocity changing collisions. The populations in the velocity and excited states are calculated under an assumption of a quasi-stationary state. With the model we derive the velocity distribution of the ground state atoms from that of excited atoms in the n = 3 level observed for an LHD plasma, where n is the principal quantum number. The mean kinetic energy of the ground state atoms is estimated to be 5.6 eV, which is 0.05 eV less than that of the n = 3 atoms.

Published
2011

95. Edge and Core Impurity Transport Study with Spectroscopic Instruments in LHD

Author

Morita, Shigeru, primary, Goto, Motoshi, additional, Kobayashi, Masahiro, additional, Muto, Sadatsugu, additional, Chowdhuri, Malay Bikas, additional, Chunfeng, Dong, additional, Hangyu, Zhou, additional, Zhengying, Cui, additional, Fujii, Keisuke, additional, Furuzawa, Akihiro, additional, Hasuo, Masahiro, additional, Iwamae, Atsushi, additional, Yinxian, Jie, additional, Koubiti, Mohammed, additional, Sakurai, Ikuya, additional, Tawara, Yuzuru, additional, Baonian, Wan, additional, Zhenwei, Wu, additional, and Yamaguchi, Naohiro, additional

Published
2009
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results