Esarey E, Schroeder CB, Shadwick BA, Wurtele JS, Leemans WP
Center for Beam Physics, Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.
Phys Rev Lett. 2000 Apr 3;84(14):3081-4. doi: 10.1103/PhysRevLett.84.3081.
Nonparaxial propagation of ultrashort, high-power laser pulses in plasma channels is examined. In the adiabatic limit, pulse energy conservation, nonlinear group velocity, damped betatron oscillations, self-steepening, self-phase modulation, and shock formation are analyzed. In the nonadiabatic limit, the coupling of forward Raman scattering (FRS) and the self-modulation instability (SMI) is analyzed and growth rates are derived, including regimes of reduced growth. The SMI is found to dominate FRS in most regimes of interest.
研究了超短高功率激光脉冲在等离子体通道中的非傍轴传播。在绝热极限下，分析了脉冲能量守恒、非线性群速度、阻尼贝塔朗日振荡、自陡峭、自相位调制和激波形成。在非绝热极限下，分析了前向拉曼散射（FRS）与自调制不稳定性（SMI）的耦合，并推导了增长率，包括增长率降低的情况。发现在大多数感兴趣的情况下，SMI主导FRS。
