Plasma wake-field effects on high-current relativistic electron beam transport in the ion-focused regime

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860319· OSTI ID:6946444

Miller, J D; Schneider, R F; Weidman, D J ^[1]; Nguyen, K T ^[2]

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1. Naval Surface Warfare Center, Silver Spring, Maryland 20903-5000 (United States)
2. 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), Journal Name: Physics of Fluids B; (United States) Vol. 4:12; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
ACCELERATORS
AMINES
BEAM INJECTION
BEAM-PLASMA SYSTEMS
EXCIMER LASERS
GAS LASERS
KRYPTON FLUORIDE LASERS
LASERS
LINEAR ACCELERATORS
METHYLAMINE
MODULATION
ORGANIC COMPOUNDS
RELATIVISTIC BEAM INJECTION
WAKEFIELD ACCELERATORS