INVESTIGATION OF MICROWAVE PROPERTIES OF PLASMAS. Scientific Report No. 10, August 1-October 31, 1960

Technical Report · Sun Jan 01 04:00:00 EST 1961

OSTI ID:4015143

Chodorow, M

Observations on fluctuations in a tube with tungsten buttons heated by electron bombardment are reported. Impedance of cesium plasma is discussed. The possibility of measuring two-frequency correlations in the noise spectrun is considered. Problems involved in measuring harmonics in plasma are discussed and data on air and argon up to the 5th harmonic are reported. Construction of a movable probe is described. Research on the electron beam interaction with a plasma is described. In the experiments on nonlinear effects in a plasma parametric amplifier, it was found that measured losses may be explained as due mainly to the volume collision rate of electrons with neutrals and possibly partially to boundary conditions. Fluctuations of number density in a plasma column are shown to result in phase modulation of a microwave signal propagating along the column. Preliminary results of an experimental comparison of an external probe coupled into a discharge and a normal Langmuir probe are given. A mechanism is proposed for the formation of the d-c sheath (so-called "r-f confinement") in which the sheath is replaced by a sheath capacitor and a current generator. Theoretical studies of noniinearity in plasmas are summarized. (D.J.C.)

• Research Organization: Stanford Univ., Calif. Microwave Lab.
• NSA Number: NSA-15-025530
• OSTI ID: 4015143
• Report Number(s): ML-776; AFCRL-7; AD-25348
• Country of Publication: United States
• Language: English

Related Subjects

AIR
ARGON
BEAMS
CESIUM
CONFINEMENT
DENSITY
ELECTRIC DISCHARGES
ELECTRONS
FREQUENCY
HEATING
INTERACTIONS
IRRADIATION
LANGMUIR PROBE
MEASURED VALUES
MICROWAVES
PHYSICS
PLASMA
SAMPLING
TUBES
TUNGSTEN