Boundary driven unconventional mechanism of macroscopic magnetic field generation in beam-plasma interaction

Das, Amita; Kumar, Atul; Shukla, Chandrasekhar; Bera, Ratan Kumar; Verma, Deepa; Mandal, Devshree; Vashishta, Ayushi; Patel, Bhavesh; Hayashi, Yukio; Tanaka, K. A.; Chatterjee, Gourab; Lad, Amit D.; Kumar, G. Ravindra; Kaw, P. K.

doi:10.1103/physrevresearch.2.033405

Cited by 8 publications

(6 citation statements)

References 27 publications

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“…This is seen in all regions of the wave propagation -precursors, bubble region and the wake region. The electromagnetic nature of the excitations is primarily due to the finite size of the source and in accord with past theoretical predictions [16][17][18] and a recent experimental observation. 18,19…”

Section: A Two Dimensional Thin Rectangular Sourcesupporting

confidence: 84%

“…The electromagnetic nature of the excitations is primarily due to the finite size of the source and in accord with past theoretical predictions [16][17][18] and a recent experimental observation. 18,19…”

Section: A Two Dimensional Thin Rectangular Sourcesupporting

confidence: 84%

“…The finite transverse size of the source also introduces a modification in the field characteristics of the precursor and other source induced excitations in that they are no longer purely electrostatic but have a magnetic component to it. Such a modification arising from finite size effects had been predicted theoretically [16][17][18] and observed experimentally 19 in other contexts. This is the first time that they have been observed for precursor waves.…”

Section: Discussionmentioning

confidence: 63%

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Signatures of an energetic charge bunch moving in a plasma

Dharodi¹,

Kumar²,

Sen³

2022

Preprint

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A charge bunch moving in a plasma can excite a variety of linear and nonlinear waves in the form of trailing wakes, fore-wake shocks and precursor solitons. These structures can further interact with the background plasma to create secondary effects that can serve as signatures of the passage of the charge bunch. Using particlein-cell simulations we investigate in detail the dynamics of a plasma system that is being traversed by an energetic charged ion bunch. Using two different shapes of the charge source, namely, an idealized one dimensional line source and a two dimensional thin rectangular source we examine the differences in the nature of the excited wave structures and their consequent impact on the background plasma. Our simulations reveal interesting features such as the dependence of the precursor speeds on the total charge of the ion bunch, local particle trapping, and energization of the trapped ions in various regions along the traversal path leading to the formation of energetic ion beam-lets. The collective excitations and the signatures in the ambient plasma could prove useful in practical applications such as in ion beam heating of plasmas. They can also help in analysing the trajectories of charged objects like space debris orbiting in the ionosphere. ‡ This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

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Section: A Two Dimensional Thin Rectangular Sourcesupporting

confidence: 84%

Section: A Two Dimensional Thin Rectangular Sourcesupporting

confidence: 84%

Section: Discussionmentioning

confidence: 63%

See 1 more Smart Citation

Signatures of an energetic charge bunch moving in a plasma

Dharodi¹,

Kumar²,

Sen³

2022

Preprint

Self Cite

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“…long-scale magnetic field generation (Bret 2009; Das et al. 2020), nonlinear electromagnetic structure formation (Verma et al. 2016; Mandal, Vashistha & Das 2020; Yadav et al.…”

Section: Introductionmentioning

confidence: 99%

Harmonic generation in the interaction of laser with a magnetized overdense plasma

et al. 2021

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The mechanism of harmonic generation in both O- and X-mode configurations for a magnetized plasma has been explored here in detail with the help of particle-in-cell simulations. A detailed characterization of both the reflected and transmitted electromagnetic radiation propagating in the bulk of the plasma has been carried out for this purpose. The efficiency of harmonic generation is shown to increase with the incident laser intensity. A dependency of harmonic efficiency has also been found on magnetic field strength. This work demonstrates that there is an optimum value of the magnetic field at which the efficiency of harmonic generation maximizes. The observations are in agreement with theoretical analysis. For the O-mode configuration, this is compelling as the harmonic generation provides for a mechanism by which laser energy can propagate inside an overdense plasma region.

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“…A ponderomotive electric current is formed J = n e ev ∼ n e ∇I and it induces the magnetic field as B ∼ ∇n e × ∇I. Theoretical and numerical studies have proved that magnetic field with 100 MG can be generated via the interaction of overdense plasma and intense (I ∼ 10 18 W/cm 2 ) laser pulse [99][100][101][102][103] . Comparing with Biermann battery effect, the ponderomotive driven magnetic field is much stronger.…”

Section: Thermoelectric Field and Ponderomotive Driven Fieldmentioning

confidence: 99%

Magnetic field annihilation and charged particle acceleration in ultra-relativistic laser plasmas

Bulanov

2021

High Pow Laser Sci Eng

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Magnetic reconnection driven by laser plasma interactions attracts great interests in the recent decades. Motivated by the rapid development of the laser technology, the ultra strong magnetic field generated by the laser-plasma accelerated electrons provides unique environment to investigate the relativistic magnetic field annihilation and reconnection. It opens a new way for understanding relativistic regimes of fast magnetic field dissipation particularly in space plasmas, where the large scale magnetic field energy is converted to the energy of the nonthermal charged particles. Here we review the recent results in relativistic magnetic reconnection based on the laser and collisionless plasma interactions. The basic mechanism and the theoretical model are discussed. Several proposed experimental setups for relativistic reconnection research are presented.

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Boundary driven unconventional mechanism of macroscopic magnetic field generation in beam-plasma interaction

Cited by 8 publications

References 27 publications

Signatures of an energetic charge bunch moving in a plasma

Signatures of an energetic charge bunch moving in a plasma

Harmonic generation in the interaction of laser with a magnetized overdense plasma

Magnetic field annihilation and charged particle acceleration in ultra-relativistic laser plasmas

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