核融合研究
Online ISSN : 1884-9571
Print ISSN : 0451-2375
ISSN-L : 0451-2375
8 巻, 3 号
選択された号の論文の5件中1~5を表示しています
  • 福井 崇時, 早川 幸男, 本沢 忠夫, 西村 浩之, 大林 治夫
    1962 年 8 巻 3 号 p. 165-197
    発行日: 1962年
    公開日: 2011/03/04
    ジャーナル フリー
    In order to investigate the motion of electrons as single particles, we have constructed a magnetic bottle, into which electrons are injected by an electron gun, The magnetic bottle field was produced by a pair of air core coils excited by a steady current, A cylindrical vacuum chamber was inserted through the coils, so that its axis coincides with the magnetic axis, Electrons were injected at the center of the bottle and were observed at various positions.
    The present paper is the first report of our experiment, by which we aim at understanding qualitative features of the motion of electrons in our device, We are here interested mainly in the effect of scattering by gases on the mirror loss, In order to avoid the shadow effect of the gun as far as possible, electrons were injected as short pulses, so that a fraction of electrons getting rid of colliding with the gun system could be distinguished from those which have collided, The shadow effect was further eliminated by varying the pressure of a gas (He or A) filled in the chamber, The trapping time of injected electrons was deduced essentially from the intensity of slow electrons produced by their collisions with gas atoms and it was found to be accounted for in terms of the single Coulomb scattering. The lifetime of the slow electrons can be qualitatively explained by their atomic scattering.
  • プラズマ銃と磁気進行波ピストン
    西垣 正之, 山中 千代衛, 山村 豊
    1962 年 8 巻 3 号 p. 235-251
    発行日: 1962年
    公開日: 2011/03/04
    ジャーナル フリー
    We performed the experiments on the plasma accelerators of two types. One is a rail type plasma gun and another is a travelling magnetic wave accelerator. In the former type, the plasma is accelerated by Lorentz force of the electric current and in the later type, the magnetic, piston which travels along the electric delay line acts as the drivings force. In both we measured the electric current, the velocity of plasma, some propagation characteristics, electron temperature and ion density by using a coaxial shunt, a streak camera, a Faraday cell camera, a photo-multiplier and floating double probes.
    The maximum velocity of plasma was 5 × 106cm/sec for, a rod-rail type gun, 5.8 × 106cm/sec for a half-cylindrical rail type gun and 10 × 106cm/sec for the magnetic piston type. One of the important conditions for the acceleration was the distribution of the magnetic field. It was improved by varying the types of rails of the plasma gun and by changing the design of delay line on the magnetic piston type. The ion density of accelerated plasma bundle was about 108cm-3. The experiment on injection of plasma to the magnetic bottle and the ion density measurement by resonance probes are now going on.
  • 武田 進, 築島 隆繁
    1962 年 8 巻 3 号 p. 252-274
    発行日: 1962年
    公開日: 2011/03/04
    ジャーナル フリー
    磁場内プラズマ中での電磁波の伝搬定数、即ち位粗定数及び減衰定数はプラズマの諸性質を研究する上で重要な因子であるが、我々は現在の研究を進めていく上で、各パラメータ(電子密度、衝突頻度および磁場)を広範囲に亘って変化させた場合のその定数を知る必要に迫られ、電子計算機NEAG-2205により正確な値を求めたので、その一部を資料として報告する。
  • 福井 崇時, 早川 幸男, 本沢 忠夫, 西村 浩之, 大林 治夫
    1962 年 8 巻 3 号 p. 275-318
    発行日: 1962年
    公開日: 2011/03/04
    ジャーナル フリー
    磁場内における荷電粒子のふるまいについて基礎的な知識を得ることを目的として、小型の磁気ビン装置を用いた実験が我々のグループで進められている。1) -3) さしあたつてはできるだけ簡単な磁場を設定し、空間電荷やプラズマ運動の効果などを考えなくてよいような条件のもとに、単独粒子の運動を調べることに重点がおかれている。この研究の一環として、こゝでは実験と比較されるべき軌道理論の内容について検討を加えたい。
  • 松浦 健哉, 本間 琢也, 小川 潔
    1962 年 8 巻 3 号 p. 319-345
    発行日: 1962年
    公開日: 2011/03/04
    ジャーナル フリー
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