Investigation of the mechanism of excitation of stochastic oscillations in a beam--plasma discharge

Journal Article · Sat Dec 01 04:00:00 EST 1973 · Zh. Eksp. Teor. Fiz., v. 65, no. 6, pp. 2236-2249

OSTI ID:4334662

Lavrovskii, V A; Kharchenko, I F; Shustin, E G

The structure of high-frequency oscillations and the velocity distribution function for the beam electrons in a beam-plasma discharge in a magnetic fleld are investigated. The causes of the discrepancy between the experimental results and predictions of the nonlinear theory of interaction between the beam and plasma are elucidated. It is shown that the instability characteristics measured over short time periods are in agreement wtth the theoretical predictions. The structure of the high-frequency oscillations excited in the discharge indicate that the beam interacts with a finite number of discrete plasma oscillation modes randomly alternating in time. The instantaneous electron distribution function is a complex multi-peak curve. It is found that stochastization of the oscillations is due to development of instability by trapped particles in the nonlinear stag~ of beam instability. (auth)

• Research Organization: Inst. of Radio Engineering and Electronics, Moscow
• NSA Number: NSA-29-019860
• OSTI ID: 4334662
• Journal Information: Zh. Eksp. Teor. Fiz., v. 65, no. 6, pp. 2236-2249, Journal Name: Zh. Eksp. Teor. Fiz., v. 65, no. 6, pp. 2236-2249; ISSN ZETFA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

*BEAM-PLASMA SYSTEMS-- STOCHASTIC PROCESSES
DISTRIBUTION FUNCTIONS
ELECTRON BEAMS
EXCITATION
N70300* --Physics--Controlled Thermonuclear Research-- Kinetics (General)
NONLINEAR PROBLEMS
TRAPPED-PARTICLE INSTABILITY
VELOCITY