Direct spectroscopic observation of ion deceleration accompanying laser plasma–wall interaction

0352258 - FZÚ 2011 RIV GB eng J - Journal Article
Renner, Oldřich - Krouský, Eduard - Liska, R. - Šmíd, M. - Larroche, O. - Dalimier, E. - Rosmej, F.
Direct spectroscopic observation of ion deceleration accompanying laser plasma–wall interaction.
Journal of Physics: Conference Series. Roč. 244, č. 2 (2010), 022024/1-022024/4. ISSN 1742-6588. E-ISSN 1742-6596
R&D Projects: GA MŠMT(CZ) LC528; GA ČR GAP205/10/0814
Institutional research plan: CEZ:AV0Z10100523
Keywords : plasma-wall interaction * x-ray spectroscopy * plasma diagnostics * plasma simulations
Subject RIV: BL - Plasma and Gas Discharge Physics

Interactions of plasma jets with solid surfaces are studied in context with development of future fusion devices. In experiments carried out on the iodine laser system PALS, the energetic ions were produced at double-foil Al/Mg targets. The plasma jets from the laser-exploded Al foil streamed towards the secondary Mg target preheated by the action of the high-energy photons, particle and laser beams. The forward-accelerated Al ions collided with the counter-propagating matter ejected from the wall. The environmental conditions in near-wall plasmas were analyzed with the high-resolution x-ray spectroscopy and temporally-resolved x-ray imaging. The deceleration of the incident Al ions was quantitatively characterized via Doppler shifts of the J-satellite from the Al Ly_alpha spectral group. The interaction scenario was modelled using the 2D arbitrary Lagrangian Eulerian hydrocode PALE and the multifluid code MULTIF.
Permanent Link: http://hdl.handle.net/11104/0191806