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Journal Articles

Theory of the Newcomb equation and its application in magnetohydrodynamic stability problems

Tokuda, Shinji

Denki Gakkai Kenkyukai Shiryo, Purazuma Kenkyukai (PST-05-20$$sim$$22$$cdot$$24$$sim$$35), p.35 - 38, 2005/03

The Newcomb equation arising in magnetohydrodynamic stability problems for a tokamak plasma has regular singular poins that are rational surfaces. The Frobenius solution around the regular singular point plays important roles in various MHD problems. A numerical method is proposed which extracts, by using Legendre polynomials, the singular solution included in a solution for the eigenvalue problem associated with the Newcomb equation.

Journal Articles

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

Journal Articles

A Bright prospect of low aspect ratio tokamaks toward a power reactor

Nishio, Satoshi

Denki Gakkai Purazuma Kenkyukai Shiryo (PST-03-37), p.1 - 6, 2003/10

no abstracts in English

Journal Articles

Public acceptance of a low aspect ratio tokamak reactor from the point of view of waste

Tobita, Kenji

Denki Gakkai Kenkyukai Shiryo, Purazuma Kenkyukai (PST-03-37$$sim$$44), p.19 - 22, 2003/09

no abstracts in English

Journal Articles

On the confinement of alpha particles in a low-aspect-ratio tokamak reactor

Tani, Keiji; Tobita, Kenji; Nishio, Satoshi; Iio, Shunji*; Tsutsui, Hiroaki*; Aoki, Takayuki*

Denki Gakkai Purazuma Kenkyukai Shiryo (PST-03-39), p.13 - 18, 2003/09

Studies were made on ripple losses of fusion produced alpha particles in a tokamak reactor with a non-circular plasma cross-section by using an orbit-following Monte-Carlo code. A preliminary estimation of ripple loss of alpha particles in VECTOR, a compact tokamak type fusion reactor, with a negative magnetic shear was also made

Journal Articles

Evaluation of plasma current profile on a low-aspect-ratio tokamak reactor

Sengoku, Seio

Denki Gakkai Purazuma Kenkyukai Shiryo (PST-03-41), p.23 - 26, 2003/09

no abstracts in English

Journal Articles

Energetic particles in spherical torus

Tobita, Kenji

Denki Gakkai Kenkyukai Shiryo, Pulazuma Kenkyukai (PST-01-73), p.43 - 46, 2001/09

Behavior of energetic particles in spherical torus (ST) is summarized in comparison with that in tokamaks. The issues treated in this article are neoclassical transport, ripple loss, Alfven eigenmodes and Magetohydrodynamic- instability-induced anomalous transport. ST is expected to be favorable in terms of neoclassical transport and ripple loss. On the other hand, Alfven eigenmodes and the resulting energetic particle loss can be serious concerns in a ST reactor because of a high volume-averaged beta and a super-Alfvenic speed of alpha particles.

Journal Articles

Development of quadrupole mass spectrometer capable of separating deuterium peak from helium one

Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio

EP-92-20, p.31 - 41, 1992/06

no abstracts in English

Oral presentation

Improvement of beam uniformity in a Cs-seeded large negative ion source

Seki, Takayoshi; Hanada, Masaya; Tobari, Hiroyuki; Inoue, Takashi; Kashiwagi, Mieko; Taniguchi, Masaki; Watanabe, Kazuhiro; Sakamoto, Keishi; Takado, Naoyuki*; Mizuno, Takatoshi*; et al.

no journal, , 

no abstracts in English

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