Current neutralization and charge transport of an REB in low-pressure argon

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · IEEE Trans. Plasma Sci.; (United States)

DOI:https://doi.org/10.1109/TPS.1986.4316541· OSTI ID:5728080

Iyyengar, S K; Rohatgi, V K

A numerical study of current neutralization and its effect on charge transport of a 0.175-MeV 6-kA 30-ns relativistic electron beam (REB) in argon at low pressure of 10/sup -2/-1 torr is presented. Contribution of two-stream instabilities to plasma conductivity is included in the calculations. The calculations show that energy coupled from beam to plasma is about 1-3 percent in the pressure range 0.1-1 torr. Though the two-stream contribution influences the time-dependent electron temperature and density around 0.1 torr, its effect on beam transport has been found to be only marginal. The results indicate that a maximum charge transport of 76 percent occurs around 0.08 torr when current neutralization is negligible. At 1-torr pressure, 75-percent current neutralization occurs and the charge transport is reduced to 40 percent. The numerical results have been compared with experiment and show good agreement in the pressure range 0.2-1 torr.

• Research Organization: Plasma Physics Div., Bhabha Atomic Research Centre, Trombay, Bombay 400 085
• OSTI ID: 5728080
• Journal Information: IEEE Trans. Plasma Sci.; (United States), Journal Name: IEEE Trans. Plasma Sci.; (United States) Vol. PS-14:3; ISSN ITPSB
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ARGON
BEAM NEUTRALIZATION
BEAMS
CHARGE EXCHANGE
ELECTRON BEAMS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
HEATING
INSTABILITY
LEPTON BEAMS
MEDIUM VACUUM
MEV RANGE
MEV RANGE 01-10
NONMETALS
PARTICLE BEAMS
PLASMA HEATING
PLASMA INSTABILITY
RARE GASES
RESEARCH PROGRAMS
SIMULATION
TIME DEPENDENCE