ION CYCLOTRON RESONANCE IN A MOVING PLASMA

Journal Article · Mon Jul 01 04:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4648964

Bakaev, I I; Zalesskii, Yu G; Nazhrov, I I; Ukrainskii, A M; Tolok, V T

Ion cyclotron resonance is a rapid method of heating a plasma bundle for injection into a magnetic trap. In order to investigate this method of heating a moving plasma, a plasma waveguide was madr up in the form of a tube of molybdenum glass 75 mm in diameter and 2 m long. A vacuum of about 10/sup -6/ mm Hg std was created in the tube, and hydrogen gas was injected in bursts into one end of the tube about 45 cm from the edge of the homogeneous longitudinal magnetic field created by discharging an electrical current through a solenoid surrounding the tube. The velocity of the plasma bundle was found to be V/sub z/ = 6.7 x 10/sup 6/ cm/sec. as measured by an electric probe in the plasma, and by the rate of rise of the loading on the circuit created by the plasma bundle (the rise time of the plasma bundle is about 6 mu sec). Absorption of high-frequency energy by the plasma bundle is observed at two frequencies that are displaced on both sides of a certain average frequency as a result of the Doppler effect. With two magnetic barriers (on each side of the solenoid). two high-energy absorption peaks are observed because of the damping of two ion cyclotron waves having frequencies of omega /sub 1/ and omega /sub 2/. With the removal of one of the magnetic barriers, one of the ion cyclotron waves is reflected into the solenoid coil, and only a single absorption peak is observed. The density of the plasma bundle was found to be 7 x 10/sup 12/ cm/sup -3/, as calculated from the dispersion relationship for a stationary plasma. (TTT) of magnetoactive plasma and neutral charged particles moving at a relativistic rate parallel direction to an external magnetic field. An increment of excitation was developed for longitudinal waves and magnetic field waves propagating along the external field when the theraml motion of particles is neglected. (R.V.J.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-040169
• OSTI ID: 4648964
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
CIRCUITS
COILS
CONFIGURATION
CONFINEMENT
CURRENTS
CYCLOTRON RADIATION
CYCLOTRONS
DENSITY
DISPERSION RELATIONS
ELECTRIC DISCHARGES
ELECTRICITY
ELEMENTARY PARTICLES
FIELD THEORY
FREQUENCY
GASES
GLASS
HEATING
HOMOGENEOUS REACTORS
HYDROGEN
INJECTION
IONS
LOSSES
MAGNETIC FIELDS
MAGNETIC MIRRORS
MAGNETIC TRAPS
MEASURED VALUES
MICROWAVES
MIXING
MOLYBDENUM
MOTION
NUMERICALS
PHYSICS
PLASMA
PULSES
QUANTUM MECHANICS
REFLECTION
RESONANCE
SCATTERING
SCATTERING AMPLITUDE
SPECTRAL SHIFT
TESTING
TUBES
VACUUM
VELOCITY
WAVEGUIDES