Formation and propagation of laser-driven plasma jets in an ambient medium studied with X-ray radiography and optical diagnostics

Dizière, A.; Pełka, A.; Ravasio, A.; Loupias, B.; Falize, É.; Kuramitsu, Yasuhiro; Sakawa, Y.; Morita, T.; Pikuz, S. A.; Yurchak, Roman; Kœnig, M.

doi:10.1063/1.4905525

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…Our experimental results with the ambient plasma show the essential aspects of reconnections, i.e., the cusp and the Alfvénic outflows. These results bring tremendous benefit to various fields of science and engineering, such as magnetic sails 25 – 27 , micro magnetospheres 28 – 31 , plasma jets 21 , 32 – 34 , and the reconnections in electron scales 6 – 8 . For instance, lunar surface magnetic fields have typically smaller size than ion gyroradius of the solar wind; it is considered that the electron dynamics plays essential roles on their interactions with the solar wind 29 – 31 .…”

Section: Discussionmentioning

confidence: 95%

Magnetic reconnection driven by electron dynamics

et al. 2018

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Magnetic reconnections play essential roles in space, astrophysical, and laboratory plasmas, where the anti-parallel magnetic field components re-connect and the magnetic energy is converted to the plasma energy as Alfvénic out flows. Although the electron dynamics is considered to be essential, it is highly challenging to observe electron scale reconnections. Here we show the experimental results on an electron scale reconnection driven by the electron dynamics in laser-produced plasmas. We apply a weak-external magnetic field in the direction perpendicular to the plasma propagation, where the magnetic field is directly coupled with only the electrons but not for the ions. Since the kinetic pressure of plasma is much larger than the magnetic pressure, the magnetic field is distorted and locally anti-parallel. We observe plasma collimations, cusp and plasmoid like features with optical diagnostics. The plasmoid propagates at the electron Alfvén velocity, indicating a reconnection driven by the electron dynamics.

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Section: Discussionmentioning

confidence: 95%

Magnetic reconnection driven by electron dynamics

et al. 2018

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“…X-ray imaging is a fundamental diagnostic in the high energy density physics (HEDP) community, finding use in a wide range of fields including laboratory astrophysics 1 , 2 and inertial confinement fusion research 3 , 4 . It enables the study of the temporal evolution of fast evolving phenomena such as shock compression of matter 5 – 7 or plasma jets 8 , blast waves 9 , or hydrodynamic instabilities which are often opaque to visible light 10 . The recent development of very high-energy laser systems such as the NIF or LMJ 11 opens new opportunities for experimental investigations of HEDP, necessitating both high spatial and temporal resolution X-ray imaging techniques to follow the microscale dynamics of these extreme states of matter.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, if the pinhole substrate is sufficiently heated, the material may expand, thus closing the pinhole and quenching the X-rays 32 . The resolution is therefore both strongly limited by the total number of available photons as well as the sensitivity of the detector used to measure them 8 . In this paper, we propose a new experimental scheme, capable of providing the number of photons, resolution and field of view, needed for a wide range of applications, adding to other X-ray imaging platforms currently in use.…”

Section: Introductionmentioning

confidence: 99%

Advanced high resolution x-ray diagnostic for HEDP experiments

Faenov

Pikuz

Mabey

et al. 2018

Sci Rep

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High resolution X-ray imaging is crucial for many high energy density physics (HEDP) experiments. Recently developed techniques to improve resolution have, however, come at the cost of a decreased field of view. In this paper, an innovative experimental detector for X-ray imaging in the context of HEDP experiments with high spatial resolution, as well as a large field of view, is presented. The platform is based on coupling an X-ray backligther source with a Lithium Fluoride detector, characterized by its large dynamic range. A spatial resolution of 2 µm over a field of view greater than 2 mm2 is reported. The platform was benchmarked with both an X-ray free electron laser (XFEL) and an X-ray source produced by a short pulse laser. First, using a non-coherent short pulse laser-produced backlighter, reduced penumbra blurring, as a result of the large size of the X-ray source, is shown. Secondly, we demonstrate phase contrast imaging with a fully coherent monochromatic XFEL beam. Modeling of the absorption and phase contrast transmission of X-ray radiation passing through various targets is presented.

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“…We have worked on the so-called laboratory astrophysics, where space and astrophysical phenomena are experimentally simulated in laboratories with high-power lasers, such as plasma jet [1][2][3][4] , collisionless shocks [5][6][7][8][9][10] and hydrodynamic instabilities [11,12] . We recently extended our research field to include the relativistic regime of laboratory astrophysics with intense laser pulses [13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

Large-area suspended graphene as a laser target to produce an energetic ion beam

Khasanah

Bolouki

Huang

et al. 2017

High Pow Laser Sci Eng

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Proton radiography is a key diagnostics to measure and image the electric/magnetic field in laser-produced plasmas. A thin solid target is irradiated with an intense laser pulse to produce a proton beam. The accelerated proton can achieve higher energy with thinner target. In order to produce an extremely thin target, we have developed a large-area suspended graphene as a laser target for energetic ion sources. We describe the manufacturing process of the suspended graphene, and show the results of quality evaluations.

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Formation and propagation of laser-driven plasma jets in an ambient medium studied with X-ray radiography and optical diagnostics

Cited by 8 publications

References 29 publications

Magnetic reconnection driven by electron dynamics

Magnetic reconnection driven by electron dynamics

Advanced high resolution x-ray diagnostic for HEDP experiments

Large-area suspended graphene as a laser target to produce an energetic ion beam

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