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Volume 65 (1991)
- Issue 6 Pages 601-
- Issue 5 Pages 489-
- Issue 4 Pages 399-
- Issue 3 Pages 289-
- Issue 2 Pages 115-
- Issue 1 Pages 5-
Volume 65, Issue 4
Displaying 1-6 of 6 articles from this issue
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Noboru Fujisawa, Haruyuki Kimura, Yoshihiro Ohara, Kazuya Uehara, Taku ...1991 Volume 65 Issue 4 Pages 399-417
Published: April 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSITER current drive and heating system has to provide various functions, such as initial plasma formation, current ramp-up assist, heating to ignition, current drive, current profile control, and burn control. The system is composed of radio-frequency waves with several frequencies and neutral beams with high energy to cover those multi-functions. The first option is based on a neutral beam (75MW, 1.3MeV), lower hybrid waves (50MW, 5GHz) and electron cyclotron waves (20MW, 120GHz). Another candidate uses ion cyclotron waves (130MW, 15-80MHz) instead of the neutral beam. The conceptual designs for those four systems are described here.View full abstractDownload PDF (2353K) -
Tetsuya Sato1991 Volume 65 Issue 4 Pages 418-421
Published: April 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSIn this series of lectures we plan to place particular emphasis on the impact of computer simulations in changing the main stream of thought on modern physics which until now has been based upon the purely mathematical science. We are seeking a new methodology that will lead us to an intuitive comprehension of the highly complex and nonlinear behavior of nature. We are presently in the midst of a fog. However, we perceive a light, though very faint, in front of us. If some of the readers can grasp the aim of this series of lectures after reading them and see the light that awaits us, however faint it may appear, we may consider this series a great success.View full abstractDownload PDF (492K) -
Ritoku Horiuchi1991 Volume 65 Issue 4 Pages 422-434
Published: April 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSThis paper explains the self-organization process in magnetohydrodynamic (MHD) plasmas which are disclosed by means of the MHD simulation. The MHD plasma is described by nonlinear partial differential equations with a small dissipation term. Three-dimensional computer simulations indicate that in the self-organizing system there are at least two nontrivial global invariants in the nondissipative limit and the selective dissipation between these quantities takes place in a small dissipation medium. This process is caused by two different transfer processes in the wavenumber space, i. e., normal cascade and inverse cascade. The role of driven reconnection in the self-organization of the magnetohydrodynamic plasma is also given.View full abstractDownload PDF (1591K) -
Hikosuke Maeda, Sanae-I. Itoht1991 Volume 65 Issue 4 Pages 435-446
Published: April 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSThe significance of medium-and small-size devices is reviewed and discussed taking the case of ITER Physics R&D. It is pointed out that the heat flux density expected in a fusioning plasma will become as large as an unexperienced high level and it is not self-evident that one could extend the present energy confinement time scaling to predict ITER performances. Systematic research is highly desired on medium-and small-size devices in order to get insight into the physics of plasma confinement which will provide us the methodology for confinement improvement.View full abstractDownload PDF (1403K) -
1991 Volume 65 Issue 4 Pages 479a
Published: 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSDownload PDF (53K) -
1991 Volume 65 Issue 4 Pages 479b
Published: 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSDownload PDF (53K)
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