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Volume 68 (1992)
- Issue 6 Pages 549-
- Issue 5 Pages 467-
- Issue 4 Pages 360-
- Issue 3 Pages 226-
- Issue 2 Pages 101-
- Issue 1 Pages 6-
Volume 68, Issue 4
Displaying 1-7 of 7 articles from this issue
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Akito Takahashi1992 Volume 68 Issue 4 Pages 360-367
Published: October 25, 1992
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSRecent progress of “cold fusion” research is reviewed.Accumulated experimental results in these three years since March 1989 are classified as 1) weak neutron emission, 2) tritium generation with anomalous n/T ratio, 3) charged particle emission with anomality, 4) He-4 generation, 5) large excess heat generation and 6) anomalous enhancement of D/Pd ratio.Resutls of 1) through 4) suggest the existence of unclarified nuclear reactions in Pd (or Ti) /Deuterium systems.Relation between excess heat and nuclear products is yet to be clarified.Subjectives of further research are mentioned.View full abstractDownload PDF (838K) -
Masahiro Wakatani1992 Volume 68 Issue 4 Pages 368-379
Published: October 25, 1992
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSAlpha particle physics of toroidal (or tokamak) plasmas is discussed based on the reports for the survey of physics related to fast ions and alpha particles published by the Japan Society of Plasma Science and Nuclear Fusion Research.Main topics are alpha particle confinement, destabilization or stabilization of MHD modes by alpha particles, alpha particle driven bootstrap current, alpha heating driven thermal instability, and alpha ash exhaust.Diagnostics for alpha particles confined in toroidal plasma and for neutrons and gamma rays are explained briefly. Finally research subjects in future D-T reacting plasmas are discussed.View full abstractDownload PDF (1298K) -
[in Japanese]1992 Volume 68 Issue 4 Pages 380-385
Published: October 25, 1992
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESS -
Shunji Ido, Kuniaki Sakamoto1992 Volume 68 Issue 4 Pages 386-394
Published: October 25, 1992
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSThe motions of electrons are traced in magnetic and electric fields of magnetron sputtering systems.Electrons are emitted from a target cathode and show drift motions resulting in generation of plasmas. Collisions between electrons and neutral gas atoms of Ar are examined by using Monte Carlo method.Ionization points are used to calculate sputtering rate on a target. The calculated profiles of sputtering rate show good agreement with the erosion profiles measured in experiments.View full abstractDownload PDF (703K) -
Noriyoshi Nakajima, Jiro Todoroki, Masao Okamoto1992 Volume 68 Issue 4 Pages 395-403
Published: October 25, 1992
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSThe relation between the Hamada and the Boozer magnetic coordinate systems is clarified by deriving them from a general magnetic fied coordinate system. The coordinate transformation from the Hamada to the Boozer coordinate system is performed using a transformation function, which is easily calculated with the knowledge of the magnetic field strength only.In non-axisymmetric systems, the Fourier spectrum of the magnetic field strength |B| in the Hamada coordinate system is broader than that in the Boozer coordinate system and the leading modes of IBI in the Hamada coordinate system significantly deviate from a simple model field in comparison with the Boozer coordinate system.The Boozer coordinate system is suitable for numerical calculations, especially, for neoclassical and orbit calculations in non-axisymmetric systems.View full abstractDownload PDF (902K) -
Kunihiko Okano, Nobuyuki Inoue, Yuichi Ogawa, Zensho Yoshida1992 Volume 68 Issue 4 Pages 404-408
Published: October 25, 1992
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSThe bootstrap current (BSC) in non-circular tokamaks is studied with a simplified analytic model, and the scaling formula is derived.The BSC rateIB/IP in the plasma with the elongation κ is proportionl to (εaκ)1/2βP, rather than εa1/2βp, where εa is the inverse aspect ratio.This is one of the reasons why the ITER BSC scaling was writen in a somewhat strange form, that is, (εa1/2, βP) 1.3.View full abstractDownload PDF (428K) -
Shun-ichi Oikawa, Naoyuki Kayukawa, Yoshiaki Aoki, Takeaki Enoto1992 Volume 68 Issue 4 Pages 409-414
Published: October 25, 1992
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSA theoretical model is developed to explain the suppression of the motion of a turbulent fluid lump in magnetohydrodynamic flows with a spatial gradient of the electrical conductivity.The model is based on Prandtl's mixing-length theory.The equation of motion for the fluctuation velocity in a Lagrangian frame of reference is solved.An analytical expression for the damped Reynolds' stress tensor in the presence of a spatial gradient of the electrical conductivity has also been obtained.View full abstractDownload PDF (461K)
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