EXPERIMENTS ON THE NEGATIVE RADIATION TEMPERATURE AT CYCLOTRON RESONANCE IN COLD PLASMA

Technical Report · Fri Feb 01 04:00:00 EST 1963

OSTI ID:4713154

Tanaka, S; Mitani, K; Kubo, H

BS>The anomalous microwave radiation from a plasma in a magnetic field was observed. The intensity was extremely large compared with that of blackbody and amounted to the power radiated from the plasma in the thermal equilibrium equivalent to 5.5 x 10/sup 6/ un. Concent 85% K in the case of Kr and 1.5 x 10/ sup 6/ un. Concent 85% K in Xe. This radiation occurred very sharply at the cyclotron field, the width being one order smaller than that of normal cyclotron radiation. The radiation was observed in Xe, Kr, and Ar plasmas in the pressure range of p = 1 x 10/sup -1/ st run. Concent 5 mm Hg, but not in Ne and He plasmas at any pressure. Further, the radiation was observed when the whole tube was placed in a longitudinal magnetic field, but not when a part of the positive column was immersed in the field. The theoretical condition for a negative temperature at the cyclotron resonance in a weakly ionized gas was investigated. Whether this anomalous radiation could be interpreted as a phenomenon of the negative radiation temperature was discussed. 22 references. (auth)

• Research Organization: Nagoya, Japan. Univ. Inst. of Plasma Physics
• NSA Number: NSA-17-022718
• OSTI ID: 4713154
• Report Number(s): IPPJ-6
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ARGON
BIBLIOGRAPHY
CYCLOTRON RADIATION
HELIUM
IONIZATION
KRYPTON
MAGNETIC FIELDS
MEASURED VALUES
MICROWAVES
NEON
NUMERICALS
PHYSICS
PLASMA
PRESSURE
RADIATIONS
RESONANCE
TEMPERATURE
TUBES
XENON