TY - JOUR
T1 - TIME EVOLUTION of KELVIN-HELMHOLTZ VORTICES ASSOCIATED with COLLISIONLESS SHOCKS in LASER-PRODUCED PLASMAS
AU - Kuramitsu, Y.
AU - Mizuta, A.
AU - Sakawa, Y.
AU - Tanji, H.
AU - Ide, T.
AU - Sano, T.
AU - Koenig, M.
AU - Ravasio, A.
AU - Pelka, A.
AU - Takabe, H.
AU - Gregory, C. D.
AU - Woolsey, N.
AU - Moritaka, T.
AU - Matsukiyo, S.
AU - Matsumoto, Y.
AU - Ohnishi, N.
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers 24740369, 21340172, and 15K17670; a grant for the Core-to-Core Program from JSPS; by the Asian Core Program for High Energy Density Science Using Intense Laser Photons commissioned by JSPS; and by the Ministry of Science and Technology, Taiwan, under Grant No. MOST-103-2112-M- 008-001-MY2 and MOST 104-2911-I-008-504.
Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved.
PY - 2016/9/10
Y1 - 2016/9/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84991699727&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84991699727&partnerID=8YFLogxK
U2 - 10.3847/0004-637X/828/2/93
DO - 10.3847/0004-637X/828/2/93
M3 - Article
AN - SCOPUS:84991699727
SN - 0004-637X
VL - 828
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 93
ER -