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Volume 15 (1965)
- Issue 6 Pages 637-
- Issue 5 Pages 523-
- Issue 4 Pages 306-
- Issue 3 Pages 157-
- Issue 2 Pages 75-
- Issue 1 Pages 1-
Volume 15, Issue 5
Displaying 1-6 of 6 articles from this issue
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Tsutomu Kuroda, Sigeo Nagao, Kiyokata Matsuura1965 Volume 15 Issue 5 Pages 523-531
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThe stabilization of the plasma in P.I. G. discharge have been studied in the various kinds of the magnetic field configuration, -a cusp field, a mirror field and a Heliotron type field. The frequencey spectrum and the amplitude of the anode voltage fluctuations and plasma density are measured. A stable and optimum discharge condition as a plasma source is obtained in a Heliotron type field. In such a field, the plasma noise is reduced to one fiftieth as small as that in a uniform field and the plasma density becomes much greater than in other field configurations.View full abstractDownload PDF (1647K) -
Keiichi Hirano, Masatada Yamanouchi1965 Volume 15 Issue 5 Pages 542
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSA new type of air gop switch for crowbering is reported.
It consists of two main electrodes between which two sheets of trigger electrodes with a hole in its centre are inserted.
Trigger electrodes. are clssely spaced each other sandwitching a insulating plastic ring. When a rapid sising over volted triger pulse is applied, break-downs occur symmetrically in both gaps between main and trigger electrodes, which enables satis factoryly crowbering characteristics.View full abstractDownload PDF (284K) -
Kazuo Mori, Kiyohiko Okazaki, Kozo Ando1965 Volume 15 Issue 5 Pages 546-551
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSOn an energetic arc, shapes of emitted spectral lines were investigated spectrographically, Ion temperatures from their halfwidths, velocities of collective rotational drift, of emitting ions from their spectral inclinations on transverse observation, and velocities of collective axial motion from their wavelength shifts on longitudinal observation were respectively estimated. Maximum values obtained were : (1) 20 eV of ion temperature at the center between electrodes of the arc, (2) 7×105 cm/sec of e+ rotational drift velocity, (3) 1.5×106 cm/sec of C++ axial drift velocity. They increase with the decrease of neutral gas pressure. Increase of the are current decreases the axial drift velocity, and increases the ion temperature. Increase of the axial magnetic field increases both the ion's rotational, drift velocity and on a smaller degree the ion temperature.View full abstractDownload PDF (962K) -
Masumi Sato, Yoshisuke Hatta1965 Volume 15 Issue 5 Pages 560-563
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSLight intensity of a positive column in a longi tudinal magnetic field changes with the field and becomes minimum at the critical field value when the helical oscillation appears in the positive column. As this change is very steep at the critical point even when the longi todinal electric field does not clearly show no point, the observation of the light intensity of the positive column may be useful for the detection of the critical field value.View full abstractDownload PDF (423K) -
Masumi Sato, Yoshisuke Hatta1965 Volume 15 Issue 5 Pages 567-572
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThis paper reports co-existence of the moving striation and the helical oscillation in the positive column in a longitudinal magnetic field. The existing regions for these oscillations are graphically obtained in relation to the magnetic field and the electric field of the column and the experimental results of the co-existence can be explained by the graph. In very short tube, thee is no critical magnetic field therefore no helical oscillation but instead the moving striation up to very large magnetic field. The striation is also affected by external conditions such as discharge current, heater current etc.View full abstractDownload PDF (675K) -
Tadao HONZAWA, Shigetoshi TANAKA, Hiroyuki IKEZI, Kazuo TAKAYAMA1965 Volume 15 Issue 5 Pages 575-597
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSIn the present paper are described the results of experiment on the interaction between a plasma, in particular, its electron component and a microwave in some types of magnetic field. A static magnetic field was externally produced v a pair of air core coil blocks consisting of some seperated coils, and a cylindrical cavity was set between the coil blocks. A, plasma beam was stationarily injected into the cavity on and along its axis, Microwave power was pulsively fed into it from a magnetron oscillator, too. The interaction in interest was investigated by measuring the flux and energy of soft x-rays emitted from plasma with an x-ray detector, and by analysing pulses of current diffusing across magnetic lines of force accepted by a probe. The emission of soft x-ray was observed only when the magnetic field was of mirror geometry, and was found to depend strongly upon the position of electron cyclotron resonance zone in a mirror field. Furthermore, the observation of pressure dependence of the emission showed that, if any gas was used, secondary electrons produced by fast ones in the trapping region could gain much energy from the microwave and become energetic particles, under an appropriate condition. From the decaying slope of probe current pulses was obtained the mean lifetime of trapped particles, from which some informations about the accelerating rate for trapped electrons could be got as well as from the x-ray energy. In the final part of this paper interpretations of the results mentioned above are made from the view of the single particle model.View full abstractDownload PDF (1859K)
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