Intensity dependent waiting time for strong electron trapping events in speckle stimulated raman scatter

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Physics of Plasmas

OSTI ID:956379

Rose, Harvey ^[1]; Daughton, W ^[1]; Yin, L ^[1]

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1. Los Alamos National Laboratory

The onset of Stimulated Raman scatter from an intense laser speckle is the simplest experimentally realizable laser-plasma-interaction environment. Despite this data and recent 3D particle simulations, the controlling mechanism at the onset of backscatter in the kinetic regime when strong electron trapping in the daughter Langmuir wave is a dominant nonlinearity is not understood. This paper explores the consequences of assuming that onset is controlled by large thermal fluctuations. A super exponential dependence of mean reflectivity on speckle intensity in the onset regime is predicted.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 956379
• Report Number(s): LA-UR-09-00697; LA-UR-09-697; PHPAEN; TRN: US1004042
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA
INTERACTIONS
ELECTRONS
FLUCTUATIONS
KINETICS
LASERS
REFLECTIVITY
TRAPPING
RAMAN EFFECT