Accession Number:

AD0668028

Title:

INSTABILITY OF DISCHARGE WITH AN INCANDESCENT CATHODE IN A MAGNETIC FIELD AT LOW PRESSURES,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1967-08-10

Pagination or Media Count:

37.0

Abstract:

Results are given of the investigation of gas discharge with an incandescent cathode in equipotential volume in a magnetic field with an intensity of up to 2000 Oe. In the investigated range of pressures from .0000021 to .001 torr there will be formed a plasma column negatively charged relative to the surrounding walls. It is established that such a discharge with an increased pressure of neutral gas becomes unstable. A steadily revolving plasma jet to the electron side pulled out from the region of the first beam will be formed. The appearance of the jet is the result of polarization of plasma in the beam of primary electrons in the presence of azimuthal heterogeneity of density and the difference in drift speeds of ions and electrons. With a further increase in pressure the stationary rotation vanishes and in the discharge there are developed intense oscillations with a continuous spectrum of frequencies. There is given an explanation of the basic regularities of behavior of the discharge. On the basis of the simplified model an expression is obtained for the frequency of rotation of the jet, which is qualitatively confirmed by the experiment. Author

Subject Categories:

  • Electricity and Magnetism
  • Optics
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE