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Volume 52 (1984)
- Issue 6 Pages 456-
- Issue 5 Pages 391-
- Issue 4 Pages 313-
- Issue 3 Pages 247-
- Issue 2 Pages 99-
- Issue 1 Pages 5-
Volume 52, Issue 2
Displaying 1-6 of 6 articles from this issue
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1984 Volume 52 Issue 2 Pages 99-110
Published: September 20, 1984
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESS -
[in Japanese]1984 Volume 52 Issue 2 Pages 111-124
Published: September 20, 1984
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESS -
[in Japanese]1984 Volume 52 Issue 2 Pages 125-128
Published: September 20, 1984
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESS -
Takashige TSUKISHIMA, Atsushi MASE1984 Volume 52 Issue 2 Pages 129-162
Published: September 20, 1984
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSPrinciples and methods of diagnosing magnetically confined plasmas with electromagnetic waves in a range from microwaves to visibles, are reviewed. In particular, interferometric methods for density and current distribution measurements, the method of determining electron temperature distribution from the second harmonic electron cyclotron emission, and the scattering method for measuring local electron and ion temperatures, and density fluctuations are described.View full abstractDownload PDF (2980K) -
Yuji Nakamura, Hiroshi Nishihara, Masahiro Wakatani1984 Volume 52 Issue 2 Pages 173-198
Published: September 20, 1984
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSDensity increase by pellet injection into magnetically confined plasmas is an interesting subject from the point of view of the transport problem. Ablation process of the pellet is analyzed by the shielded neutral ablation model developed by Milora and Foster. A self-limiting ablation process is also taken into account to find a particle deposition profile. It is shown that optimization of both the pellet size and velocity according to plasma parameters of the target plasma is required to increase density efficiently.
The particle deposition profile is coupled with the numerical code to study the transport process in a tokamak and a heliotron. The pellet injection into an ohmically heated plasma of ISX-B tokamak is studied by our code and good agreement between the numerical results and the experimental data is obtained.
Pelet injection into a currentless NBI heated plasma of Heliotron E is studied and time evolutions of density, temperature and pressure profiles are demonstrated. When beta value increases by the pellet injection, MHD stability against the pressure-driven mode becomes an important criterion to determine the pellet size and velocity. In other words the pressure profile can be controlled by the pellet injection.View full abstractDownload PDF (2584K) -
Kiyomitsu Suzuki1984 Volume 52 Issue 2 Pages 199-206
Published: September 20, 1984
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSTwo dimensional equilibria of field reversed configuration with plasma outside the separatrix is investigated. By numerical calculation, it is found that the separatrix (ψ=0) becomes spindly as βs (beta ratio on the surface ψ=0) increases. Remarkable is that the surface ψ=0 becomes an open surface and no more the separatrix as βs is increased beyond a critical value, and furthermore, that only axially uniform configurations are obtained when βs is greater than a second critical value. Existance of the critical values of βs are explained with use of a long thin plasma model and a condition of axial force balance which takes into account the plasma outside the separatrix. The critical values obtained with this model well agree with the two dimensional numerical results as well as radii of the plasma at the center plane and at the ends of vessel.View full abstractDownload PDF (644K)
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