Modeling of annular-laser-beam-driven plasma jets from massive planar targets

0435181 - ÚFP 2015 RIV US eng J - Journal Article
Kmetík, Viliam - Limpouch, J. - Liska, R. - Váchal, P.
Modeling of annular-laser-beam-driven plasma jets from massive planar targets.
Laser and Particle Beams. Roč. 30, č. 3 (2012), s. 445-457. ISSN 0263-0346. E-ISSN 1469-803X
R&D Projects: GA MŠMT(CZ) LC528
Institutional support: RVO:61389021
Keywords : ALE fluid code * Collimated outflows * Cylindrical cumulation * Laboratory astrophysics
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.016, year: 2012

Production of sharply collimated high velocity outflows - plasma jets from massive planar targets by a single laser beam at PALS facility is clarified via numerical simulations. Since only a few experimental data on the intensity distribution in the interaction beam near the focus are available for the PALS facility, the laser beam profile was calculated by a numerical model of the laser system and the interaction optics. The obtained intensity profiles are used as the input for plasma dynamic simulations by our cylindrical two-dimensional fluid code PALE. Jet formation due to laser intensity profile with a minimum on the axis is demonstrated. The outflow collimation improves significantly for heavier elements, even when radiative cooling is omitted. Using an optimized interaction beam profile, a homogeneous jet with a length exceeding its diameter by several times may be reliably generated for applications in laboratory astrophysics and impact ignition studies.
Permanent Link: http://hdl.handle.net/11104/0239101