Observation of resistive Weibel instability in intense laser plasma

Krishnamurthy, S.; Makur, K.; Ramakrishna, B.

doi:10.1017/s0263034620000154

Cited by 2 publications

(1 citation statement)

References 53 publications

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“…Although the plasma does not remain strictly bi-Maxwellian, this approximation continues to produce growth rates consistent with theory. In principle, the arguments made here may hold, at least, qualitatively, in more non-Maxwellian systems, e.g., distributions with a hot streaming population of electrons [16][17][18].…”

Section: Introductionmentioning

confidence: 83%

Effects of collisions on the generation and suppression of temperature anisotropies and the Weibel instability

Schoeffler

Silva

2020

Phys. Rev. Research

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The expansion of plasma with nonparallel temperature and density gradients and the generation of a magnetic field via the Biermann battery is modeled using particle-in-cell simulations that include collisional effects via Monte Carlo methods. A scaling of the degree of collisionality shows that an anisotropy can be produced and drive the Weibel instability for gradient scales shorter than the mean free path. For larger collision rates the Biermann battery dominates as the cause of magnetic-field generation. When the most energetic particles remain collisionless the Nernst effect causes the Biermann field to be dragged with the heat flux piled up and enhanced.

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Section: Introductionmentioning

confidence: 83%

Effects of collisions on the generation and suppression of temperature anisotropies and the Weibel instability

Schoeffler

Silva

2020

Phys. Rev. Research

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Collimation and energy enhancement in laser driven MeV protons

2023

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Enhancing the energy and controlling the divergence of proton beam have been crucial tasks since the development of laser-based ion accelerators. In this study, we employ 2D particle-in-cell EPOCH simulation to investigate a method to control the divergence and enhance the energy of MeV proton beam produced from the interaction of high intensity laser with a gold target. The energy and divergence of proton beam for the conventional laser-foil target configuration are compared with our proposed three laser-three target configuration. In the single laser-single target configuration, a high intensity laser irradiates a gold foil target resulting in proton acceleration from the plasma. In contrast, in the three laser-three target configuration, the generated proton beam is allowed to traverse through the configuration of two parallel Al plates irradiated with high intensity lasers. The new configuration provides the proton energy enhancements of 40% and more collimated beam compared to the single laser-foil target setup. This collimation and energy increase are due to the vertical and horizontal components of the electric field generated by the hot electron plasma of Al plates. The proton energy and divergence can also be tuned by varying the plasma electron density of the Al plasma. Also, the control of proton beam collimation is explored by varying target parameters as well, and it is observed that the separation between the Al plates and length of the Al plates plays major role in controlling the divergence of the beam. This study will have a significant impact in the ongoing laser fusion program, fast ignition, and laser ion therapy.

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Observation of resistive Weibel instability in intense laser plasma

Cited by 2 publications

References 53 publications

Effects of collisions on the generation and suppression of temperature anisotropies and the Weibel instability

Effects of collisions on the generation and suppression of temperature anisotropies and the Weibel instability

Collimation and energy enhancement in laser driven MeV protons

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