Kuramitsu, Y., Mizuta, A., Sakawa, Y. et al. (13 more authors) (2016) TIME EVOLUTION of KELVIN-HELMHOLTZ VORTICES ASSOCIATED with COLLISIONLESS SHOCKS in LASER-PRODUCED PLASMAS. Astrophysical journal. 93. ISSN 1538-4357
Abstract
We report experimental results on Kelvin-Helmholtz (KH) instability and resultant vortices in laser-produced plasmas. By irradiating a double plane target with a laser beam, asymmetric counterstreaming plasmas are created. The interaction of the plasmas with different velocities and densities results in the formation of asymmetric shocks, where the shear flow exists along the contact surface and the KH instability is excited. We observe the spatial and temporal evolution of plasmas and shocks with time-resolved diagnostics over several shots. Our results clearly show the evolution of transverse fluctuations, wavelike structures, and circular features, which are interpreted as the KH instability and resultant vortices. The relevant numerical simulations demonstrate the time evolution of KH vortices and show qualitative agreement with experimental results. Shocks, and thus the contact surfaces, are ubiquitous in the universe; our experimental results show general consequences where two plasmas interact.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Keywords: | hydrodynamics,instabilities,plasmas,shock waves,turbulence,waves |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 09 Nov 2016 15:45 |
Last Modified: | 23 Nov 2024 00:30 |
Published Version: | https://doi.org/10.3847/0004-637X/828/2/93 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.3847/0004-637X/828/2/93 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107238 |
Download
Filename: Kuramitsu_2016_ApJ_828_93.pdf
Description: Kuramitsu_2016_ApJ_828_93