Plasma wake-field effects on high-current relativistic electron beam transport in the ion-focused regime
- Naval Surface Warfare Center, Silver Spring, Maryland 20903-5000 (United States)
- Mission Research Corporation, Newington, Virginia 22122 (United States)
Modulation of the beam current has recently been observed during ion-focused regime (IFR) transport of a high-power relativistic electron beam propagating through a low-density background plasma. Injecting a high-current, high-energy electron beam into an IFR channel immersed in a background plasma induces plasma oscillations. These background plasma oscillations, induced by the rise-time portion of the beam ejecting plasma electrons from the vicinity of the beam into the background plasma, give rise to a modulated axial electric field. This field travels with the beam leading to beam energy and current oscillations. In the experiment, a 1.7 MeV, 1 kA, rise-time-sharpened electron beam is propagated on a KrF excimer laser-produced IFR channel in trimethylamine (TMA) gas, which is immersed in a low-density plasma-filled transport tube. Experimental measurements, analytical theory, and detailed computer simulations are presented demonstrating modulation of this high-current relativistic electron beam near the low-density background plasma frequency.
- OSTI ID:
- 6946444
- Journal Information:
- Physics of Fluids B; (United States), Vol. 4:12; ISSN 0899-8221
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
WAKEFIELD ACCELERATORS
RELATIVISTIC BEAM INJECTION
BEAM-PLASMA SYSTEMS
KRYPTON FLUORIDE LASERS
METHYLAMINE
MODULATION
ACCELERATORS
AMINES
BEAM INJECTION
EXCIMER LASERS
GAS LASERS
LASERS
LINEAR ACCELERATORS
ORGANIC COMPOUNDS
700350* - Plasma Production
Heating
Current Drive
& Interactions- (1992-)