TY - JOUR
T1 - Studies of intense-laser plasma instabilities
AU - Láska, L.
AU - Krása, J.
AU - Badziak, J.
AU - Jungwirth, K.
AU - Krouský, E.
AU - Margarone, D.
AU - Parys, P.
AU - Pfeifer, M.
AU - Rohlena, K.
AU - Rosiński, M.
AU - Ryć, L.
AU - Skála, J.
AU - Torrisi, L.
AU - Ullschmied, J.
AU - Velyhan, A.
AU - Wołowski, J.
PY - 2013/5/1
Y1 - 2013/5/1
N2 - The PALS high power iodine laser system in Prague (λ = 1.315 μm) was used to study non-linear processes in a laser-produced plasma at intense laser beam interactions with planar targets. The focus setting allows to alter the non-linear interaction of the main laser pulse with the ablated plasma produced by the front edge of a nanosecond laser pulse (300 ps FWHM). The arisen non-linear effects significantly influence the behavior of electrons, which accelerate fully striped or highly charged fast ions. Variations in time of the expanding plasma, recorded at the target surface by the use of Kentech low-magnification soft X-ray streak camera on ∼2 ns time scale, are presented and discussed. Narrowing, arching and even splitting of expansion paths in the target-normal space-time diagram are shown. These phenomena are ascribed to the magnetic field, self-generated at high laser intensities, which may become strong enough to cause pinching of the expanding plasma.
AB - The PALS high power iodine laser system in Prague (λ = 1.315 μm) was used to study non-linear processes in a laser-produced plasma at intense laser beam interactions with planar targets. The focus setting allows to alter the non-linear interaction of the main laser pulse with the ablated plasma produced by the front edge of a nanosecond laser pulse (300 ps FWHM). The arisen non-linear effects significantly influence the behavior of electrons, which accelerate fully striped or highly charged fast ions. Variations in time of the expanding plasma, recorded at the target surface by the use of Kentech low-magnification soft X-ray streak camera on ∼2 ns time scale, are presented and discussed. Narrowing, arching and even splitting of expansion paths in the target-normal space-time diagram are shown. These phenomena are ascribed to the magnetic field, self-generated at high laser intensities, which may become strong enough to cause pinching of the expanding plasma.
KW - Laser plasma instabilities
KW - Longitudinal structure of the expanding plasma
KW - Self-generated magnetic field
UR - http://www.scopus.com/inward/record.url?scp=84876050022&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2012.01.085
DO - 10.1016/j.apsusc.2012.01.085
M3 - Article
AN - SCOPUS:84876050022
SN - 0169-4332
VL - 272
SP - 94
EP - 98
JO - Applied Surface Science
JF - Applied Surface Science
ER -