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Volume 14 (1965)
- Issue 6 Pages 696-
- Issue 5 Pages 476-
- Issue 4 Pages 340-
- Issue 3 Pages 260-
- Issue 2 Pages 135-
- Issue 1 Pages 1-
Volume 14, Issue 5
Displaying 1-7 of 7 articles from this issue
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Tadao HONZAWA, Shigetoshi TANAKA, Hiroyuki IKEZI, Kazuo TAKAYAMA1965 Volume 14 Issue 5 Pages 476-489
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSDownload PDF (986K) -
Kiyoshi Yatsui, Yoshio Inuishi1965 Volume 14 Issue 5 Pages 490-509
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSRelation between anomalous diffusion and oscillations of the positive column located in the longitudinal magnetic field in the range 0-2, 200 gauss was studied to examine the theory of Kadomtsev and Nedospasov.
By investigation of intensity and spectrum of the oscillations in the region of anomalous diffusion, higher harmonics of high frequency oscillation of the order 1 Mc/s were detected.
It is concluded that the excitation of high frequency oscillation is the essential cause of anomalous diffusion phenomenon in opposition to the theory of Kadomtsev and Nedospasov.
In addition, we investigated the set-in-magnetic-field of helical instability by changing the intensity of low frequency oscillation and found that the set-in-magnetic-field decreases with increasing intensity of pre-helical oscillations.
It may relate to the hysteresis characteristics of EZ-B first proposed by Nakano et al.View full abstractDownload PDF (1380K) -
Kenji Inoue, Sigeru Mori, Masatoshi Tanaka1965 Volume 14 Issue 5 Pages 510-513
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThe plasma stream presented by our coaxial plasma gun includes various impurity components of which copper and carbon are very serious. Emission lines from these impurities are measured by a 3. 4M Fastie-Ebert type polychrometor.
In order to reduce copper ions, a longitudinal magnetic field is applied along, the passage of the plasma stream. For example, relative intensity of CuII 2247A to HeII 4686A is redu ced to 1/30 after passing through a magnetic field of 1000 gauss. Also, this relative intensity varies with operation conditions of the gun.View full abstractDownload PDF (821K) -
Syoichi Miyoshi, Shinji Shiobara, Yuichi Sakamoto1965 Volume 14 Issue 5 Pages 521-535
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSElectrostatic probe measurement of electron density in magnetized plasma is discussed. Experiments are made in helium at pressures ranging from 0.3 to 1.6mmHg with 1011-1012/cc of plasma electron density and 0-5000 gauss of magnetic field strength.
The influence of magnetic field, pressure and discharge current on the saturation electron current to cylindrical probe is investigated, for which the plasma electron density determined by the following two methods is taken as the true density : one is based on probe characteristic of ion current almost free from the effect of magnetic field, the other is with a microwave cavity devised to become free from the effect of magnetic field. Results of experiment show that the thickness of sink region around the probe perpendicular to the magnetic field is given by Ve/ (ω2p+ω2B) 1/2where Ve is the thermal velocity of electron, and ωP and ωB are respectively the angular frequencies of electron plasma and cyclotron.
Use of this region and the theory developed by Dote enables the numerical determination of electron density of magnetized plasma. The electron density calculated by using electron current characteristics of the probe with its axis parallel to the magnetic flux agrees well with the true electron density of magnetized plasma. The electron density measurement with the probe perpendicular to the magnetic line of force is also investigated.View full abstractDownload PDF (1200K) -
Sadao Nakamura, Kenji Mitani1965 Volume 14 Issue 5 Pages 536-547
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSWe measured the formative time lag of breakdown of Neon at low pressure over the range from 0 to 700 gousses of the magnetic field parallel to the applied electric field, and found that the time lag decreased with magnetic field intensity increasing. This result was in good agreement with the theory given by Mitani and Kubo considering the decreasing of diffusion loss of electrons by magnetic field.View full abstractDownload PDF (1073K) -
N. Hokkyo1965 Volume 14 Issue 5 Pages 548-558
Published: 1965
Released on J-STAGE: March 04, 2011
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Kenro Miyamoto, Junji Fujita, Sunao Kawasaki, Nobuyuki Inoue, Saburo K ...1965 Volume 14 Issue 5 Pages 559-565
Published: 1965
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSTwo wavelength He-Ne gas laser interferometer is used to measure the plasma density produced by θ pinch. The laser beam passes through the plasma in the direction perpendicular to the magnetic field. The product of the plasma density n and the thickness d is estimated to be n. d 3×1016 CM-2 in a case of our θ pinch plasma experiment.View full abstractDownload PDF (578K)
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