Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Masatada Ogasawara"'
Publikováno v:
Japanese Journal of Applied Physics. 46:1668-1673
The loss width of electron energy in the cusp magnetic field in negative ion sources is investigated analytically. Energy equation and continuity equation for electrons are solved with heat flux and particle flux parallel and perpendicular to the mag
Publikováno v:
Journal of Nuclear Materials. :526-531
The thermoelectric instability in tokamak divertor has been studied numerically by using a five-point model. When the divertor plasma temperature Tdiv decreases below a critical temperature, this instability arises in a symmetric equilibrium of scrap
Publikováno v:
Nuclear Fusion. 38:1695-1709
The onset condition of a thermoelectric instability in divertor tokamaks has been studied analytically and numerically by using a five point model based on SOL and divertor plasmas. The SOL current due to the thermoelectric effect causes the thermoel
Publikováno v:
Journal of the Physical Society of Japan. 66:3815-3825
A five-point model for the scrape-off layer and divertor plasmas has been developed to study the inside/outside divertor asymmetry induced by the divertor biasing. Effects of divertor biasing on the asymmetry are studied for low and high recycling st
Autor:
Masatada Ogasawara, Katsuhiro Shimizu, Nobuhiko Hayashi, Akiyoshi Hatayama, Tomonori Takizuka, Akiko Suzuki
Publikováno v:
Journal of Computational Physics. 131:193-198
A new “implicit” Monte Carlo (IMC) method has been developed to simulate ionization and recombination processes of impurity ions in divertor plasmas. The IMC method takes into account many ionization and recombination processes during a time step
Autor:
Masatada Ogasawara, A. Fukano
Publikováno v:
Journal of the Physical Society of Japan. 65:960-966
Two-stream instability induced by the interaction between a proton beam and a plasma is investigated analytically in consideration of the beam deceleration by the nonlinear effect. Expression of beam deceleration is derived from a modification of the
Publikováno v:
Fusion Engineering and Design. 26:351-360
Electron acceleration by a localized r.f. field is considered as a mechanism to fill the spectrum gap in lower hybrid current drive (LHCD). A simple one-dimensional model along the magnetic lines of force has been employed. The electron dynamics have
Publikováno v:
Fusion Engineering and Design. 26:507-521
Cesiated volume sources which we call hybrid sources have been reported recently to show improved results for H− production. Here we present results of numerical simulation, in particular the dependence on arc current, pressure and surface to volum
Autor:
George Tsotridis, John P. Holdren, Yuzo Fukai, Saša Blagus, Tomoaki Yoshida, Shalom Eliezer, Zohar Henis, Masabumi Nishikawa, Tadasu Takuma, Mitsuru Uetake, Ann P. Kinzig, Ignacio Goded, Masatada Ogasawara, Marijan Vuković, Kenji Yamaji, Michinori Yamauchi, Akiyoshi Hatayama, Paul J. Hibbard, Jiing Dwan Lee, Mladen Bogovac, Antun Drašner, Kunihiko Okano, Ken-ichi Tanaka
Publikováno v:
Fusion Technology. 26:1-4
Autor:
Tomoaki Yoshida, Michinori Yamauchi, Kunihiko Okano, Yuzo Fukai, Tadasu Takuma, Akiyoshi Hatayama, Kenji Yamaji, Masatada Ogasawara
Publikováno v:
Fusion Technology. 26:27-45
Plasma size and other basic performance parameters for 1000-MW (electric) power production are calculated with the blanket energy multiplication factor, the M value, as a parameter. The calculational model is based on the International Thermonuclear