Control of gigawatt REB pulse duration using gas injection
- Plasma Physics Div., Bhabha Atomic Research Center, Trombay, Bombay 400 085 (IN)
A technique for controlling the voltage and current pulse duration of a gigawatt relativistic electron beam (REB) has been investigated. Pulse duration of a beam of 250 keV and 10 kA has been controlled from 60 ns to 10 ns by injecting gases (air, argon, and hydrogen) into the diode gap at a pressure rho ranging from 10/sup -5/ torr to 10/sup -1/ torr. The observed dependence of the pulse duration on the nature and pressure of the gas is explained in terms of volume ionization of the gas by beam electrons. It is concluded that the pulse duration is governed by the time at which the plasma density created by the beam reaches a critical value eta/sub c/ of the order of beam electron number density.
- OSTI ID:
- 6532181
- Journal Information:
- IEEE Trans. Plasma Sci.; (United States), Journal Name: IEEE Trans. Plasma Sci.; (United States) Vol. 16:6; ISSN ITPSB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AIR
ARGON
BEAMS
CURRENTS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRODYNAMICS
ELECTRON BEAMS
ELEMENTS
ENERGY GAP
FLUIDS
GASES
HYDROGEN
IONIZATION
LEPTON BEAMS
NONMETALS
PARTICLE BEAMS
PLASMA DENSITY
PULSE RISE TIME
RARE GASES
TIMING PROPERTIES