Raman backscattering in laser wake-field and beat-wave accelerators

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859889· OSTI ID:6185770

Tripathi, V K; Liu, C S ^[1]

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1. Laboratory for Plasma Research, University of Maryland, College Park, Maryland 20742 (US)

An intense short laser pulse propagating through a plasma undergoes stimulated Raman backscattering when oscillatory electron velocity {ital v}{sub 0}{ge}4{ital c}/(2{omega}{sub 0}{tau}{sub 0}{omega}{sub {ital p}}{tau}{sub 0}){sup 1/2}, where {omega}{sub 0} and {tau}{sub 0} are the frequency and pulse duration of the laser and {omega}{sub {ital p}} is the plasma frequency. In a laser wake-field accelerator employing short laser pulses with {omega}{sub {ital p}}{tau}{sub 0}{similar to}2{pi}, this threshold is exceeded when {ital v}{sub 0}/{ital c}{approx gt}0.1. The threshold is smaller in a beat-wave accelerator where longer pulses are used.

• OSTI ID: 6185770
• Journal Information: Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 3:2; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
ACCELERATORS
BACKSCATTERING
BEAT WAVE ACCELERATORS
COHERENT SCATTERING
CONFIGURATION
CONVECTIVE INSTABILITIES
ENERGY
ENERGY-LEVEL TRANSITIONS
EXCITATION
INSTABILITY
LASERS
PLASMA
PLASMA INSTABILITY
PLASMA WAVES
POLARIZATION
PULSES
RAMAN EFFECT
RECTANGULAR CONFIGURATION
SCATTERING
THRESHOLD ENERGY
WAKEFIELD ACCELERATORS
WAVE PROPAGATION