Anisotropic heating and magnetic field generation due to Raman scattering in laser-plasma interactions

被引：14
|
作者：
Silva, T. [1 ]
Schoeffler, K. [1 ]
Vieira, J. [1 ]
Hoshino, M. [2 ]
Fonseca, R. A. [1 ,3 ]
Silva, L. O. [1 ]
机构：
[1] Univ Lisbon, GoLP Inst Plasmas & Fusao Nucl, Inst Super Tecn, P-1049001 Lisbon, Portugal
[2] Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan
[3] Inst Univ Lisboa ISCTE IUL, P-1649026 Lisbon, Portugal
来源：
PHYSICAL REVIEW RESEARCH | 2020年 / 2卷 / 02期
基金：
欧洲研究理事会;
关键词：
STIMULATED RAMAN; PULSES; WAVES; INSTABILITIES; AMPLIFICATION; SIMULATION; EVOLUTION; ENERGY; LIGHT;
D O I：
10.1103/PhysRevResearch.2.023080
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We identify a mechanism for magnetic field generation in the interaction of intense electromagnetic waves and underdense plasmas. We show that Raman scattered plasma waves trap and heat the electrons preferentially in their propagation direction, resulting in a temperature anisotropy. In the trail of laser pulse, we observe magnetic field growth that matches the Weibel mechanism due to the temperature anisotropy. We discuss the role of the initial electron temperature in our results. The predictions are confirmed with multidimensional particle-in-cell simulations. We show how this configuration is an experimental platform to study the long-time evolution of the Weibel instability.
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页数：6
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