Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NP11: Poster Session V: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Stellerators
HED: High Energy Density
BEAMS: Short Pulse Laser Plasmas
HED: Short Pulse Laser Plasma
SPACE: Space Plasmas
9:30 AM - 12:30 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: NP11.00082 : Generation of shocks between laser-produced plasma and jets emitted from conical wire array z-pinches.*
Presenter:
Luisa F Izquierdo
(Pontificia Universidad Catolica de Chile)
Authors:
Luisa F Izquierdo
(Pontificia Universidad Catolica de Chile)
Felipe Veloso
(Pontificia Universidad Catolica de Chile)
Julio Valenzuela
(Pontificia Universidad Catolica de Chle)
Miguel Escalona
(Pontificia Universidad Catolica de Chile)
Diego Oportus
(Pontificia Universidad Catolica de Chile)
Mario Favre
(Pontificia Universidad Catolica de Chile)
To study interaction of plasmas in high energy density (HED) environments, we have developed an experimental platform to generate and characterize shocks under controlled conditions. In this regard, a plasma jet emitted by a conical wire array Z-pinch interacts with a background laser-produced plasma plume generating an interaction region between them. In the experiments, the jet is produced by a conical wire array Z-pinch acting as load of the Llampudken generator (~400kA, ~350ns), whereas the laser plasma is produced by focusing a 20 GW/cm² Nd:YAG laser pulse onto a target located above the interelectrode region of the driver. Time-resolved laser interferometry (532nm, 6ns FWHM) aligned with the target surface is used to compute the electron density. When using aluminium in both wire array and laser target, our experimental results show that in the absence of laser-produced plasma plume, there is no significant photoionized plasma from the target that interact with the jet stream. On the contrary, in the presence of both plasma sources, a new structure appears at the interaction region. The thickness of this new structure agrees with ion-ion mean free path calculated for a wide range of parameters for each plasma. This result suggests the presence of a collisionally-mediated shock layer created after the interaction. Further details and potential applications will be shown and discussed.
*This work is partially supported by Conicyt/QUIMAL N° 190011 and Fondecyt/regular N° 1220533 projects. L.I. also acknowledges IUPAP Women in Physics Travel Grant Program for partially covering the attendance to this meeting.
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