Excitation of surface plasma waves by a density modulated electron beam at a conductor-dusty plasma interface
- Department of Physics, Swami Shraddhanand College, University of Delhi, Alipur, Delhi-110036 (India)
- Department of Physics, Maharaja Agrasen Institute of Technology, Rohini, Delhi-110086 (India)
- India Meteorological Department, Ministry of Earth Science, Lodi Road, New Delhi-110003 (India)
A density modulated electron beam propagating through a conductor-dusty plasma interface drives electromagnetic surface plasma waves (SPWs) to instability via Cerenkov and cyclotron interaction. The SPWs propagate across an external magnetic field parallel to the interface. Numerical calculations of the growth rate and unstable mode frequencies have been carried out for the typical parameters of the SPWs. The frequency and the growth rate of the unstable wave instability increase with the relative density of negatively charged dust grains {delta} (= n{sub io}/n{sub eo}, where n{sub io} is the ion plasma density and n{sub eo} is the electron plasma density). The phase velocity of the unstable waves also increases with {delta}. In addition, the growth rate of the instability increases with the beam density and scales as one-third power of the beam density in Cerenkov interaction and square root of beam density in fast cyclotron interaction. Moreover, the dispersion relation of SPWs has been retrieved in the absence of the modulated beam and without dust grains.
- OSTI ID:
- 21537843
- Journal Information:
- Physics of Plasmas, Vol. 18, Issue 5; Other Information: DOI: 10.1063/1.3591345; (c) 2011 American Institute of Physics; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of beam premodulation on excitation of surface plasma waves in a magnetized plasma
Excitation of surface plasma waves by an electron beam in a magnetized dusty plasma
Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
43 PARTICLE ACCELERATORS
BEAM-PLASMA SYSTEMS
DISPERSION RELATIONS
DUSTS
ELECTRON BEAMS
EXCITATION
INTERFACES
PLASMA
PLASMA DENSITY
PLASMA INSTABILITY
PLASMA SURFACE WAVES
BEAMS
ENERGY-LEVEL TRANSITIONS
INSTABILITY
LEPTON BEAMS
PARTICLE BEAMS
PLASMA WAVES