Space and time behavior of parametric instabilities for a finite pump wave duration in a bounded plasma

Journal Article · Wed Sep 01 00:00:00 EDT 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860627· OSTI ID:6273127

Mounaix, P; Pesme, D ^[1]; Rozmus, W ^[2]; Casanova, M ^[3]

---

1. Centre de Physique Theorique, Ecole Polytechnique, 91128 Palaiseau Cedex (France)
2. Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada)
3. CEA, Centre d'etudes de Limeil-Valenton, 94195 Villeneuve-St.-Georges Cedex (France)

The space and time behavior of the decay waves is computed analytically in the regime of standard parametric decay. The plasma is assumed to be homogeneous and bounded. The pump wave has a finite pulse duration. The propagation of the pump wave is taken into account, its depletion is ignored. The parametric growth is solved in terms of fluctuating initial and boundary conditions corresponding to thermal noise at equilibrium. Fluctuating source terms, representing noise emission, are accordingly retained in the coupled mode equations. The initial stage of parametric growth is investigated in detail; the time from which the asymptotic concept of absolute or convective instability applies is computed. The connection between the Manley--Rowe and flux conservation relations is discussed.

• OSTI ID: 6273127
• Journal Information: Physics of Fluids B; (United States), Vol. 5:9; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HOMOGENEOUS PLASMA
LASER RADIATION
PARAMETRIC INSTABILITIES
BACKSCATTERING
BEAM-PLASMA SYSTEMS
CONVECTIVE INSTABILITIES
GREEN FUNCTION
INSTABILITY GROWTH RATES
ELECTROMAGNETIC RADIATION
FUNCTIONS
INSTABILITY
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
SCATTERING
700350* - Plasma Production
Heating
Current Drive
& Interactions- (1992-)