Chaos analysis from simulations of plasma turbulence driven by electron/ion temperature gradient

Matsumoto, Taro; Kishimoto, Yasuaki; Li, J.*

Denki Gakkai Purazuma Kenkyukai Shiryo (PST-05-17), p.83 - 86, 2005/03

no abstracts in English

Formation conditions for electron internal transport barriers in JT-60U plasmas

Fujita, Takaaki; Fukuda, Takeshi*; Sakamoto, Yoshiteru; Ide, Shunsuke; Suzuki, Takahiro; Takenaga, Hidenobu; Ida, Katsumi*; Idei, Hiroshi*; Shimozuma, Takashi*; Fujisawa, Akihide*; et al.

Plasma Physics and Controlled Fusion, 46(5A), p.A35 - A43, 2004/05

https://doi.org/10.1088/0741-3335/46/5A/003

no abstracts in English

Stabilization of ion temperature gradient mode by small-scale zonal flows

Li, J.; Kishimoto, Yasuaki

Physics of Plasmas, 10(3), p.683 - 688, 2003/03

https://doi.org/10.1063/1.1555057

Interaction between large-scale turbulence and small-scale sheared flows isa new issue in magnetized plasmas. In this work, the key interactionmechanism is explored by sampling the large-scale ion temperature gradient (ITG) mode and the small-scale zonal flows driven by the electron temperature gradient (ETG) turbulence. It is analytically found that the small-scale zonal flows lead to a radially non-local mode coupling of ITG fluctuations.

Key quantities for ITB formation and sustainment

Fujita, Takaaki; Aniel, T.*; Barbato, E.*; Behn, R.*; Bell, R. E.*; Field, A. R.*; Fukuda, Takeshi*; Gohil, P.*; Ida, Katsumi*; Imbeaux, F.*; et al.

Europhysics Conference Abstracts, 27A, 4 Pages, 2003/00

no abstracts in English

Slablike ion temperature gradient driven mode in reversed shear tokamaks

Idomura, Yasuhiro; Tokuda, Shinji; Kishimoto, Yasuaki

New Journal of Physics (Internet), 4(1), p.101.1 - 101.13, 2002/12

The ion temperature gradient driven (ITG) mode in reversed shear tokamaks is analyzed using a gyrokinetic toroidal particle code. It is found that the ITG mode in the reversed shear configuration shows a coupled mode structure between the slab and toroidal ITG modes. Especially in the region, a slab like feature due to the reversed shear slab ITG mode becomes strong. This coupled eigenmode structure is changed from a slab mode to a toroidal mode depending on and . Results show that in reversed shear tokamaks, the ITG mode is determined from a competition between the slab and toroidal ITG modes.

A Note on the representation of rate-of-rise of the thermal stratification interface in reactor plenum

Tokuhiro, Akira; Kimura, Nobuyuki

JNC TN9400 2000-015, 26 Pages, 1999/09

JNC-TN9400-2000-015.pdf:1.43MB

The quantification of the rate-of-rise of the thermal stratification interface, a "thin" vertical zone where the temperature gradient is the steepest, is important in assessing the potential implications of thermally-induced stress problems in liquid-metal cooled reactors. Thermal stratification can likewise occur in confined volumes containing ordinary fluids (Pr1), where there is an input of thermal convective energy. In the prominent case of liquid metal reactors, there have been many studies on quantifying the rate-of-rise of a defined stratification interface, in terms of one or more of the following dimensionless groups, mainly: Richardson (Ri), Reynolds (Re), Grashof (Gr), Rayleigh (Ra) and/or Froude (Fr) numbers. Stratification is also a transient process in the volume in question. In the present work the anthors presents a derivation based on order-of-magnitude analysis (OMA), including an sensible energy balance, that produces a new representation more consistent than p

Phase Change Predictions for Liquid Fuel in Contact with Steel Structure using the Heat Conduction Equation

Brear, D. J.

PNC TN9410 98-005, 53 Pages, 1998/01

PNC-TN9410-98-005.pdf:2.09MB

When liquid fuel makes contact with steel structure the liquid can freeze as a crust and the structure can melt at the surface. The melting and freezing processes that occur can influence the mode of fuel freezing and hence fuel relocation. Furthermore the temperature gradients established in the fuel and steel phases determine the rate at which heat is transferred from fuel to steel. In this memo the 1-D transient heat conduction equations are applied to the case of initially liquid UO brought into contact with solid steel using up-to-date materials properties. The solutions predict criteria for fuel crust formation and steel melting and provide a simple algorithm to determine the interface temperature when one or both of the materials is undergoing phase change. The predicted steel melting criterion is compared with available experimental results.

Simulation of JT-60 discharges with an experimentally calibrated theoretical transport model

J.Qiang*; C.Singer*; Hirayama, Toshio

Japanese Journal of Applied Physics, 35(5A), p.2797 - 2802, 1996/05

https://doi.org/10.1143/JJAP.35.2797

no abstracts in English

None

Chijimatsu, Masakazu*; Oanh, T.*; Amemiya, Kiyoshi*

PNC TJ1412 95-002, 186 Pages, 1995/03

PNC-TJ1412-95-002.pdf:9.67MB

None

Ion temperature profile simulation of JT-60 and TFTR plasmas with ion temperature gradient mode transport models

Shirai, Hiroshi; Hirayama, Toshio; Koide, Yoshihiko; Yoshida, Hidetoshi; Naito, Osamu; Sato, Masayasu; Fukuda, Takeshi; Sugie, Tatsuo; Azumi, Masafumi; D.R.Mikkelsen*; et al.

Nuclear Fusion, 34(5), p.703 - 727, 1994/00

https://doi.org/10.1088/0029-5515/34/5/I09

no abstracts in English