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Volume 60 (1988)
- Issue 6 Pages 377-
- Issue 5 Pages 329-
- Issue 4 Pages 263-
- Issue 3 Pages 163-
- Issue 2 Pages 103-
- Issue 1 Pages 13-
Volume 60, Issue 4
Displaying 1-5 of 5 articles from this issue
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Shoichi Ono, Kuniyoshi Yokoo1988 Volume 60 Issue 4 Pages 263-277
Published: October 20, 1988
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSHere, we explain the fundamental operation mechanism and some expected operation characteristics of the cyclotron auto-resonant peniotron, which is very recently proposed. And we cleary describe about its promising features as a high power millimeter or submillimeter wave source which will be used for electron cyclotron resonance heating (ECRH) of a nuclear fusion plasma.View full abstractDownload PDF (1536K) -
Satio Hayakawa, Yukiharu Ohsawa1988 Volume 60 Issue 4 Pages 278-291
Published: October 20, 1988
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThis is the first of a series of articles on plasma astrophysics. This article is intended to provide a basic knowledge of modern plasma astrophysics and to give a general scope of physical quantities in various astrophysical plasmas. It is shown that the ranges of parameters, such as the density, temperature, field strength, length scale, and time scale, are very wide for astrophysical plasmas. In addition, unlike laboratory plasmas, gravity often plays an essential role.View full abstractDownload PDF (13394K) -
Kaoru Ohya, Ichiro Mori1988 Volume 60 Issue 4 Pages 292-303
Published: October 20, 1988
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSFor neutral measurements, secondary electron emission from a metal is investigated with obliquely incident neutrals at keV energy range. For the simulated study with computer, the Monte Carlo program TRIM85 of ion scattering in matter is used. In addition, an experimental study is done. The results of the computer simulation show that the amount of increase in the emission yield by obliquely incidence is smaller than that estimated With 1/cos φ (φ : incident angle), which is accepted generally in high energies. It is due to multi-collisions of incident neutrals with metal atoms. The experimental results approximately agree with the calculation ones although they may include some roughness effects of the surface.View full abstractDownload PDF (1220K) -
Tadashi Isozumi, Shinji Yoshida, Hideo Sugai1988 Volume 60 Issue 4 Pages 304-316
Published: October 20, 1988
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSLithium thin films were in-situ deposited inside a discharge chamber with use of a vacuum evaporation method. A strong pumping effect was observed when lithium coated surfaces were exposed to a hydrogen plasma. Hydrogens were absorbed by lithium films up to the saturation density of 6.8 × 1022atoms cm-3. A time variation of hydrogen pressure was explained very well by a one dimentional model with the hydrogen implantation and diffusion processes taken into account. An optical emission measurement of a hydrogen plasma revealed that sputtered or vaporized lithium atoms are localized near the coated wall. The redeposition process of lithium was confirmed, using a sample probe technique. Observed chemical activities of lithium for oxygens will be useful for suppressing oxygen impurities in a fusion plasma.View full abstractDownload PDF (1135K) -
Kazuya Uehara1988 Volume 60 Issue 4 Pages 317-318
Published: October 20, 1988
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSDownload PDF (116K)
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