Experimental Observation of Ion–Ion Acoustic Instability Associated with Collisionless Shocks in Laser-produced Plasmas

Jiao, Jing; He, Simin; Zhuo, H. B.; Qiao, B.; Yu, M. Y.; Zhang, B.; Deng, Zhigang; Liu, Feng; Zhou, K. N.; Wang, X. D.; Xie, Na; Yang, Lei; Zhang, F. Q.; Zhou, Weimin; Gu, Yuqiu

doi:10.3847/2041-8213/ab4190

Cited by 6 publications

(1 citation statement)

References 36 publications

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“…In contrast to the above schemes, novel setups have been used with ultra-high-intensity lasers. For example, at the XingGuang III laser facility at the Laser Fusion Research Center in China, using a short (2 ps) intense (10 17 W/cm 2 ) laser pulse, an electrostatic (ES) collisionless shock, together with the filaments induced by ion-ion acoustic instability, could be observed via proton radiography 39 .…”

Section: Introductionmentioning

confidence: 99%

Detailed characterization of laboratory magnetized super-critical collisionless shock and of the associated proton energization

Yao,

Fazzini,

Chen

et al. 2021

Preprint

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Section: Introductionmentioning

confidence: 99%

Detailed characterization of laboratory magnetized super-critical collisionless shock and of the associated proton energization

Yao,

Fazzini,

Chen

et al. 2021

Preprint

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Detailed characterization of a laboratory magnetized supercritical collisionless shock and of the associated proton energization

Yao

Fazzini

Chen

et al. 2021

Matter and Radiation at Extremes

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Collisionless shocks are ubiquitous in the Universe and are held responsible for the production of nonthermal particles and high-energy radiation. In the absence of particle collisions in the system, theory shows that the interaction of an expanding plasma with a pre-existing electromagnetic structure (as in our case) is able to induce energy dissipation and allow shock formation. Shock formation can alternatively take place when two plasmas interact, through microscopic instabilities inducing electromagnetic fields that are able in turn to mediate energy dissipation and shock formation. Using our platform in which we couple a rapidly expanding plasma induced by high-power lasers (JLF/ Titan at LLNL and LULI2000) with high-strength magnetic fields, we have investigated the generation of a magnetized collisionless shock and the associated particle energization. We have characterized the shock as being collisionless and supercritical. We report here on measurements of the plasma density and temperature, the electromagnetic field structures, and the particle energization in the experiments, under various conditions of ambient plasma and magnetic field. We have also modeled the formation of the shocks using macroscopic hydrodynamic simulations and the associated particle acceleration using kinetic particle-in-cell simulations. As a companion paper to Yao et al. [Nat. Phys. 17, 1177-1182(2021], here we show additional results of the experiments and simulations, providing more information to allow their reproduction and to demonstrate the robustness of our interpretation of the proton energization mechanism as being shock surfing acceleration.

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Effect of ion temperature on ion acoustic shock structures in dissipative (r,q) distributed plasma

Bhatti

Qureshi

Shah³

2022

AIP Advances

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In this paper, we have studied the effect of ion temperature on the propagation of ion acoustic shock waves in unmagnetized, collisionless plasma in the presence of electrons that follow the generalized ( r, q) distribution. The Korteweg–de Vries–Burger equation has been derived, and shock structures have been presented. It has been found that only positive polarity shock structures might be observed for both Maxwellian and kappa distribution; however, both positive and negative polarity structures have been possible for the ( r, q) distribution. Interestingly, it has also been observed that the shock polarity changes with the ion temperature for the case of spiky distribution. We also found that the strength and steepening of the shock structures are directly proportional to the concentration of high energy particles, whereas the low energy particles are responsible of the reversal of shock polarity.

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Experimental Observation of Ion–Ion Acoustic Instability Associated with Collisionless Shocks in Laser-produced Plasmas

Cited by 6 publications

References 36 publications

Detailed characterization of laboratory magnetized super-critical collisionless shock and of the associated proton energization

Detailed characterization of laboratory magnetized super-critical collisionless shock and of the associated proton energization

Detailed characterization of a laboratory magnetized supercritical collisionless shock and of the associated proton energization

Effect of ion temperature on ion acoustic shock structures in dissipative (r,q) distributed plasma

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