H. Yamada

Publication List Details

Period

1979 - 2008

Number

268

Co-Authors

Drift mode calculations for the Large Helical Device (2008)

Rewoldt, G., Ku, L. P., Tang, W. M., Sugama, H., Nakajima, N., Watanabe, K. Y., ...

A fully kinetic assessment of the stability properties of toroidal drift modes has been obtained for a case for the Large Helical Device [A. Iiyoshi et al., Nucl. Fusion 39, 1245 (1999)]. This...

Configuration flexibility and extended regimes in Large Helical Device (2008)

Yamada, H., Komori, A., Ohyabu, N., Kaneko, O., Kawahata, K., Watanabe, K. Y., ...

Recent experimental results in the Large Helical Device have indicated that a large pressure gradient can be formed beyond the stability criterion for the Mercier (high-n) mode. While the stability...

MHD characteristics in the high beta regime of the Large Helical Device (2008)

Sakakibara, S., Yamada, H., Watanabe, K., Narushima, Y., Toi, K., Ohdachi, S., ...

The highest volume averaged beta values beta (t) of 2.2% at B-t = 0.75 T (gas puff) and 2.4% at D-t = 1.3 T (pellet) in helical devices have been achieved in LHD. The beta (t) dependence of MHD...

Microinstability studies for the large helical device (2008)

Rewoldt, G., Ku, L. P., Tang, W. M., Sugama, H., Nakajima, N., Watanabe, K. Y., ...

Fully kinetic assessments of the stability properties of toroidal drift modes have been obtained for cases for the large helical device (LHD). This calculation employs the comprehensive linear...

Impact of heat deposition profile on global confinement of NBI heated plasmas in the LHD (2008)

Yamada, H., Murakami, S., Yamazaki, K., Kaneko, O., Miyazawa, J., Sakamoto, R., ...

Energy confinement and heat transport of net-current-free NBI heated plasmas in the large helical device (LHD) are discussed with emphasis on density and power deposition profile dependences....

Recent advances in the LHD experiment (2008)

Motojima, O., Ohyabu, N., Komori, A., Kaneko, O., Yamada, H., Kawahata, K., ...

In the first four years of the LHD experiment, several encouraging results have emerged, the most significant of which is that MHD stability and good transport are compatible in the inward shifted...

Review on the progress of the LHD experiment (2008)

Motojima, O., Yamada, H., Komori, A., Watanabe, K. Y., Mutoh, T., Takeiri, Y., ...

Recent progress in the Large Helical Device (LHD) experiment during the last 2 yr is reviewed. The LHD has been extending its operational regime toward fusion-relevant conditions while taking...

Effects of global MHD instability on operational high beta-regime in LHD (2008)

Watanabe, K. Y., Sakakibara, S., Narushima, Y., Funaba, H., Narihara, K., Tanaka, K., ...

In the Large Helical Device (LHD), the highest operational averaged beta value has been expanded from 3.2% to 4% in the last 2 years by increasing the heating capability and exploring a new magnetic...

Three-dimensional anisotropic pressure equilibria that model balanced tangential neutral beam injection effects (2008)

Cooper, W. A., Hirshman, S. P., Yamaguchi, T., Narushima, Y., Okamura, S., Sakakibara, S., ...

Fixed boundary three-dimensional anisotropic pressure equilibria are computed that are consistent with a family of distribution functions that load particles preferentially towards v parallel to...

Stability properties of anisotropic pressure stellarator plasmas with fluid and noninteractive energetic particles (2008)

Cooper, W. A., Graves, J. P., Tran, T. M., Gruber, R., Yamaguchi, T., Narushima, Y., ...

The three-dimensional (3-D) VMEC code has been modified to model an energetic species with a variant of a Bi-Maxwellian distribution function that satisfies the constraint B . del F-h = 0, and the...

Anisotropic pressure bi-Maxwellian distribution function model for three-dimensional equilibria (2008)

Cooper, W. A., Graves, J. P., Hirshman, S. P., Yamaguchi, T., Narushima, Y., Okamura, S., ...

A formulation of the anisotropic pressure magnetohydrodynamic equilibrium problem for three-dimensional plasmas with imposed nested magnetic surfaces is developed based on a bi-Maxwellian model of...

Dispersion relation in oscillatory reaction-diffusion systems with self-consistent flow in true slime mold (2007)

Yamada, H., Nakagaki, T., Baker, R.E., Maini, P.K.

In the large amoeboid organism Physarum, biochemical oscillators are spatially distributed throughout the organism and their collective motion exhibits phase waves, which carry physiological signals....

Dispersion relation in oscillatory reaction-diffusion systems with self-consistent flow in true slime mold. (2007)

Yamada, H., Nakagaki, T., Baker, R.E., Maini, P.K.

In the large amoeboid organism Physarum, biochemical oscillators are spatially distributed throughout the organism and their collective motion exhibits phase waves, which carry physiological signals....

Extremely high silver ionic conductivity in composites of silver halide (AgBr, AgI) and mesoporous alumina (2006)

Yamada, H., Bhattacharyya, A. J., Maier, J.

The silver ionic conductivity in heterogeneous systems of AgBr:Al2O3 and AgI:Al2O3 is highly enhanced by utilizing mesoporous Al2O3 as the insulating phase. The highest Ag+ conductivity of 3.1 X...

An examination for increasing the motor constant of a cylindrical moving magnet-type linear actuator (2005)

Mizuno, T, Kawai, M, Tsuchiya, F, Kosugi, M, Yamada, H

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