Zobrazeno 1 - 10
of 343
pro vyhledávání: '"Motoshi Goto"'
Autor:
Tetsutarou Oishi, Shigeru Morita, Masahiro Kobayashi, Gakushi Kawamura, Yasuko Kawamoto, Tomoko Kawate, Suguru Masuzaki, Chihiro Suzuki, Motoshi Goto
Publikováno v:
Plasma, Vol 6, Iss 2, Pp 308-321 (2023)
The ergodic layer in the Large Helical Device (LHD) consists of stochastic magnetic fields exhibiting a three-dimensional structure that is intrinsically formed by helical coils. Spectroscopic diagnostics was employed in the extreme ultraviolet (EUV)
Externí odkaz:
https://doaj.org/article/a959f8865f864ae58979cb9c88727824
Autor:
Motoshi Goto, Gen Motojima, Ryuichi Sakamoto, Bernard Pégourié, Akinobu Matsuyama, Tetsutarou Oishi, Tomoko Kawate, Yasuko Kawamoto
Publikováno v:
Atoms, Vol 12, Iss 1, p 1 (2024)
We have recently incorporated the occupation probability formalism (OPF) in the simulation model [C. Stehlé and S. Jacquemot, Astron. Astrophys. 271, 348 (1993)] to have a smooth transition from discrete lines to continuum spectrum in the wavelength
Externí odkaz:
https://doaj.org/article/80bd29f25e454fbcbc9d8dc9ee7b1ec4
Publikováno v:
Atoms, Vol 11, Iss 6, p 94 (2023)
In this study, eight emission lines in the visible wavelength range of neutral helium were used to diagnose the electron density and temperature of the Large Helical Device (LHD) helium plasma instead of the conventional three-line method. The collis
Externí odkaz:
https://doaj.org/article/0a95082857d246a6a7f6af2927b51514
Autor:
Taisuke Kobayashi, Masahiro Kobayashi, Naofumi Iwama, Arseniy Kuzmin, Motoshi Goto, Gakushi Kawamura
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss , Pp 239-243 (2019)
Three dimensional (3D) distribution of impurity emission intensity is obtained from two dimensional (2D) image using newly developed single field-of-view tomography scheme. Spectrometer with multi-channel fiber array views the entire edge region of s
Externí odkaz:
https://doaj.org/article/06e19ef357aa431e942063cdcf7343a1
Autor:
Tetsutarou Oishi, Shigeru Morita, Daiji Kato, Izumi Murakami, Hiroyuki A. Sakaue, Yasuko Kawamoto, Motoshi Goto, the LHD Experiment Group
Publikováno v:
Nuclear Materials and Energy, Vol 26, Iss , Pp 100932- (2021)
Magnetic-dipole (M1) lines of W29+~W39+ were successfully observed in the vacuum-ultraviolet (VUV) wavelength range of 500–900 Å in the Large Helical Device (LHD). Tungsten ions are distributed in the NBI-heated LHD plasma by injecting a pellet co
Externí odkaz:
https://doaj.org/article/5b57d5df2afd489cb644b7cddd161d2b
Autor:
Tetsutarou Oishi, Shigeru Morita, Daiji Kato, Izumi Murakami, Hiroyuki A. Sakaue, Yasuko Kawamoto, Tomoko Kawate, Motoshi Goto
Publikováno v:
Atoms, Vol 9, Iss 3, p 69 (2021)
Spectroscopic studies for emissions released from tungsten ions have been conducted in the Large Helical Device (LHD) for contribution to the tungsten transport study in tungsten divertor fusion devices and for expansion of the experimental database
Externí odkaz:
https://doaj.org/article/a2bbac403b6d4047ac308a59894d3d18
Autor:
Tetsutarou Oishi, Shigeru Morita, Xianli Huang, Hongming Zhang, Yang Liu, Shuyu Dai, Masahiro Kobayashi, Gakushi Kawamura, Motoshi Goto
Publikováno v:
Nuclear Materials and Energy, Vol 12, Iss , Pp 762-767 (2017)
A space-resolved spectroscopy using a 3m normal incidence vacuum ultraviolet (VUV) spectrometer was developed to measure the VUV emission profiles in wavelength range of 300–3200Å from impurities in the edge plasmas in Large Helical Device (LHD).
Externí odkaz:
https://doaj.org/article/68e2d152a5b946af9c91dc1aa8d96fb0
Autor:
Daisuke Tanaka, Kei Sato, Motoshi Goto, So Fujiyoshi, Fumito Maruyama, Shunsuke Takato, Takamune Shimada, Akihiro Sakatoku, Kazuma Aoki, Shogo Nakamura
Publikováno v:
Frontiers in Bioengineering and Biotechnology, Vol 7 (2019)
Airborne microorganisms, especially those at high altitude, are exposed to hostile conditions, including ultraviolet (UV) radiation, desiccation, and low temperatures. This study was conducted to compare the composition and abundance of airborne micr
Externí odkaz:
https://doaj.org/article/9cf0002835264a80accd73ce0e23d8a4
Autor:
Motoshi Goto, Nilam Ramaiya
Publikováno v:
Symmetry, Vol 13, Iss 2, p 297 (2021)
We have developed an atomic model for calculating the polarization state of the Lyman-α line in plasma caused by anisotropic electron collision excitations. The model assumes a nonequilibrium state of the electron temperature between the directions
Externí odkaz:
https://doaj.org/article/c68ab128fb4c493e8c2eba9808ce918e
Autor:
Hirotaka Tanaka, Keisuke Fujii, Taiichi Shikama, Shigeru Morita, Motoshi Goto, Masahiro Hasuo
Publikováno v:
Atoms, Vol 8, Iss 4, p 81 (2020)
We developed an echelle spectrometer for the simultaneous observation of the whole visible range with a high instrumental resolution, for example, 0.055 nm (full width at the half maximum) at 400 nm and 0.10 nm at 750 nm. With the spectrometer, the e
Externí odkaz:
https://doaj.org/article/c35e453509c945c0a9cc400f9725f2ce