Kakuyūgō kenkyū
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
Search
Advanced search
OR
Browse
Search
Volume 67, Issue 1
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • In-situ Coatings for First Walls in Nuclear Fusion Devices
    Hideo Sugai
    1992 Volume 67 Issue 1 Pages 12-29
    Published: January 25, 1992
    Released on J-STAGE: October 22, 2010
    DOIhttps://doi.org/10.1585/jspf1958.67.12
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A review of the different techniques for in situ coatings of magnetic fusion devices will be given focusing on the recent development of boronization. Firstly, merits of in situ coatings, selection of low Z material, and metallic getters (Ti, Cr, Be) are described. Secondly, the reduction mechanisms of oxygen impurity by boronization and Be getter will be discussed. Thirdly, practical problems of carbonization and boronization (pure B and B/C films) are presented, together with a new proposcal of B/N film coating. Finally, in situ etching techniques of carbon and boron thin films will be summarized.
    View full abstract
    Download PDF (1916K)
  • Confinement Characteristics
    Part I Experimental Observations
    Kimitaka Itoh, Sanae-I Itoh
    1992 Volume 67 Issue 1 Pages 30-50
    Published: January 25, 1992
    Released on J-STAGE: October 22, 2010
    DOIhttps://doi.org/10.1585/jspf1958.67.30
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Experimental observations on plasma confinement are reviewed. The confinement times of the energy, fuel particle, ash and impurities are outlined. The encounter with the anomalous transport and the trials to overcome it are retraced. Methods to study confinement problems are presented: Investigations on the global confinement time, the plasma profile and the transport coefficient are presented. The characteristics of the phenomena in the core plasma and in the edge plasma are shown. Improved confinement physics is reviewed. Fast particle loss is also briefly discussed.
    View full abstract
    Download PDF (2356K)
  • Anomalous Optical Emission and Fragmentation at the Plasma-Solid Interface
    Kyouichi Katayose, Hirotaka Toyoda, Hideo Sugai
    1992 Volume 67 Issue 1 Pages 51-61
    Published: January 25, 1992
    Released on J-STAGE: October 22, 2010
    DOIhttps://doi.org/10.1585/jspf1958.67.51
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Anomalously strong optical emission from the excited CH radical was obserbed near the negatively biased electrode in a CH4/Ar glow plasma. The time evolution of the CH emission depends on the material and the surface state of the electrode as well as the applied bias voltage. A possibility of the anomalous emission by secondary electrons was denied from Monte Carlo simulation of the process. The experimental observations and calculations revealed the CH radical formation by two surface processes: fragmentation of hydrocarbon particles (ions and neutrals) at their impact on the cathode, and sputtering of the already deposited carbon film. These processes are essential for understanding the redeposition mechanisms in carbonized environement.
    View full abstract
    Download PDF (1031K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top