Non-classic efficient cavity pressure acceleration method applied to obtain very fast and dense macroparticles

0463531 - ÚFP 2017 RIV FR eng C - Conference Paper (international conference)
Borodziuk, S. - Pisarczyk, T. - Chodukowski, T. - Kalinowska, Z. - Kasperczuk, A. - Dostál, Jan - Dudžák, Roman - Krouský, Eduard - Ullschmied, Jiří - Pfeifer, Miroslav - Skála, Jiří - Pisarczyk, P.
Non-classic efficient cavity pressure acceleration method applied to obtain very fast and dense macroparticles.
EPS 2016: 43rd European Physical Society Conference on Plasma Physics. Vol. 40A. Mulhouse: European Physical Society, 2016 - (Mantica, P.; Giruzzi, G.; Fajardo, M.; Gans, T.; Poedts, S.; Vennekens, N.), č. článku P5.078. Europhysics Conference Abstracts (ECA), ECA, 40A. ISBN 2-914771-99-1.
[EPS 2016: Conference on Plasma Physics/43./. Leuven (BE), 04.07.2016-08.07.2016]
Institutional support: RVO:61389021 ; RVO:68378271
Keywords : PALS (Prague Asterix Laser System) * cavity pressure acceleration (CPA)
Subject RIV: BH - Optics, Masers, Lasers; BH - Optics, Masers, Lasers (FZU-D)

In the investigations a scheme called cavity pressure acceleration (CPA) was applied, which allows propelling plasma objects in arbitrary direction in relation to the laser beam incident on a target and more efficient use of laser pulse energy absorbed and definitely increasing pressure
causing acceleration of the foils. CPA eliminates the basic contradiction of the classic ablative acceleration process, in which this way of getting high microprojectile velocity simultaneously leads to mass loosing and density decreasing. Results obtained on PALS (Prague Asterix Laser
System) show that the application of the CPA method allows for speed of the driven plasma objects to obtain values (average velocity ~ 6x107 cm/s) comparable with top global results. Several other important results were also obtained e.g.: successful attempt to drive very thick
foils (up to 500 micro m Al) to the speed of ~ 1.0x107 cm/s, the result is not having its counterpart in the literature and indication of a simple and effective method to significantly increase the density of driven objects without significant reduction of speed through the use of targets with
"covered channel", which leads to a much higher energy density transmitted by the driven object, and the very high pressure generated by it, which is very important advantage in terms of possible use in impact fast ignition experiments
Permanent Link: http://hdl.handle.net/11104/0264866