Nonlinear evolution of the Weibel instability with relativistic laser pulses

Author:

Kuramitsu Yasuhiro12ORCID,Matsumoto Yosuke3ORCID,Amano Takanobu4ORCID

Affiliation:

1. Graduate School of Engineering, Osaka University 1 , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

2. Institute of Laser Engineering, Osaka University 2 , 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan

3. Institute for Advanced Academic Research, Chiba University 3 , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

4. Department of Earth and Planetary Science, University of Tokyo 4 , 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan

Abstract

The Weibel instability is investigated using relativistic intense short laser pulses. A relativistic short laser pulse can generate a sub-relativistic high-density collisionless plasma. By irradiating double parallel planar targets with two relativistic laser pulses, sub-relativistic collisionless counterstreaming plasmas are created. Since the growth rate of the Weibel instability is proportional to the plasma density and velocity, the spatial and temporal scales of the Weibel instability can be much smaller than that from nanosecond large laser facilities. Recent theoretical and numerical studies have revealed that astrophysical collisionless shocks in sub-relativistic regimes in the absence and presence of an ambient magnetic field play essential roles in cosmic ray acceleration. With experimental verification in mind, we discuss the possible experimental models on the Weibel instability with intense short laser pulses. In order to show the experimental feasibility, we perform 2D particle-in-cell simulations in the absence of an external magnetic field as the first step and discuss the optimum conditions to realize the nonlinear evolutions of the Weibel instability in laboratories.

Funder

JSPS KAKENHI

Core-to-Core Program

Publisher

AIP Publishing

Subject

Condensed Matter Physics

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