GROUP-VELOCITY OF LARGE-AMPLITUDE ELECTROMAGNETIC-WAVES IN A PLASMA

被引：56

作者：

DECKER, CD ^{[1
]}

MORI, WB ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES,DEPT ELECT ENGN,LOS ANGELES,CA 90024

来源：

PHYSICAL REVIEW E | 1995年 / 51卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.51.1364

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The nonlinear group velocity of a laser pulse propagating in a cold underdense unmagnetized plasma is examined. Analytical expressions for the group velocity are derived for various pulse length regimes. These expressions reduce to the usual ω/k form for small amplitude and are verified for aribtrary amplitude using particle in cell simulations on a cyclic mesh. We find that the leading edge of a pulse moves at the linear group velocity and that the phase velocity of the excited wake is less than the group velocity of the pulse for symmetrically shaped pulses. The techniques used can be applied to other waves in a plasma. © 1995 The American Physical Society.

引用

页码：1364 / 1375

页数：12

共 25 条

[1]

AKHIEZER AI, 1956, ZH EKSP TEOR FIZ, V3, P696

[2]

BERZHIANI VI, 1990, PHYS REV A, V148, P338

[3]

BIRDSALL CK, 1980, PLASMA PHYSICS VIA C

[4]

Brillouin L, 1963, WAVE PROPAGATION GRO

[5] 2-DIMENSIONAL SELF-FOCUSING OF SHORT INTENSE LASER-PULSE IN UNDERDENSE PLASMA [J].

CHEN, XL ;

SUDAN, RN .

PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1993, 5 (04) :1336-1348

[6]

DECKER C, UNPUB

[7] GROUP-VELOCITY OF LARGE-AMPLITUDE ELECTROMAGNETIC-WAVES IN A PLASMA [J].

DECKER, CD ;

MORI, WB .

PHYSICAL REVIEW LETTERS, 1994, 72 (04) :490-493

[8]

DECKER CD, 1994, THESIS UCLA

[9] NONLINEAR-ANALYSIS OF RELATIVISTIC HARMONIC-GENERATION BY INTENSE LASERS IN PLASMAS [J].

ESAREY, E ;

TING, A ;

SPRANGLE, P ;

UMSTADTER, D ;

LIU, X .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 1993, 21 (01) :95-104

[10]

GOLDSTEIN H, 1980, CLASSICAL MECHANICS, P555

← 1 2 3 →