JOPSS - Search Results

Journal Articles

Confinement degradation with beta for ELMy -mode plasmas in JT-60U tokamak

Urano, Hajime; Takizuka, Tomonori; Takenaga, Hidenobu; Oyama, Naoyuki; Miura, Yukitoshi; Kamada, Yutaka

Nuclear Fusion, 46(8), p.781 - 787, 2006/08

https://doi.org/10.1088/0029-5515/46/8/003

Times Cited Count：23 Percentile：58.7(Physics, Fluids & Plasmas)

The degradation of energy confinement with increased toroidal beta $beta_mathrm{T}$ was shown by the non-dimensional analysis in JT-60U. The dependence of the energy confinement on $beta_mathrm{T}$ was examined by both the JT-60U ELMy -mode confinement database and the dedicated experiment on a single $beta_mathrm{T}$ scan while $rho_mathrm{T}^ast$ and were kept fixed as well as the other magnetic geometrical parameters. In both cases, the degradation of energy confinement with increasing $beta_mathrm{T}$ was observed, satisfying the relation of $B_mathrm{T} tau_mathrm{E} propto beta_mathrm{T}^{-(0.6-0.7)}$ . This dependence is a little weaker than that predicted by the IPB98(y,2) scaling. The fusion power production rate was estimated to increase in proportion to $beta_mathrm{T}^{0.3-0.4} B_mathrm{T}$ .

Journal Articles

Scaling of the energy confinement time with and collisionality approaching ITER conditions

Cordey, J. G.*; Thomsen, K.*; Chudnovskiy, A.*; Kardaun, O. J. W. F.*; Takizuka, Tomonori; Snipes, J. A.*; Greenwald, M.*; Sugiyama, L.*; Ryter, F.*; Kus, A.*; et al.

Nuclear Fusion, 45(9), p.1078 - 1084, 2005/09

https://doi.org/10.1088/0029-5515/45/9/007

Times Cited Count：51 Percentile：82.28(Physics, Fluids & Plasmas)

The condition of the latest version of the ELMy H-mode database has been re-examined. It is shown that there is bias in the ordinary least squares regression for some of the variables. To address these shortcomings three different techniques are employed: (a)principal component regression, (b)an error in variables technique and (c)the selection of a better conditioned dataset with fewer variables. Scalings in terms of the dimensionless physics valiables, as well as the standard set of engineering variables, are derived. The new scalings give a very similar performance for existing scalings for ITER at the standard beta, but a much improvement performance at higher beta.

Journal Articles

Recent results and future prospects on the JT-60U tokamak

Yoshida, Hidetoshi; JT-60 Team

Fusion Technology, 26, p.406 - 417, 1994/11

no abstracts in English

Journal Articles

Improvement of confinement and remote radiative cooling of beam heated plasmas in JT-60 with ion ▽B drift towards the X-point

Tsuji, Shunji; Hosogane, Nobuyuki; Itami, Kiyoshi; Kubo, Hirotaka; Nishitani, Takeo; Shimada, Michiya; Koide, Yoshihiko; *; Sugie, Tatsuo; Nagashima, Keisuke; et al.

Nuclear Fusion, 32(8), p.1313 - 1330, 1992/00

https://doi.org/10.1088/0029-5515/32/8/I02

Times Cited Count：7 Percentile：33.03(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles