Velocity gradient induced line splitting in x-ray emission accompanying plasma-wall interaction

0395724 - FZÚ 2014 RIV GB eng J - Journal Article
Šmíd, Michal - Renner, Oldřich - Liska, R.
Velocity gradient induced line splitting in x-ray emission accompanying plasma-wall interaction.
Journal of Quantitative Spectroscopy and Radiative Transfer. Roč. 125, Aug (2013), s. 38-44. ISSN 0022-4073. E-ISSN 1879-1352
R&D Projects: GA ČR GAP205/10/0814; GA ČR GAP205/11/0571
Institutional support: RVO:68378271
Keywords : laser-produced plasmas * x-ray spectroscopy * plasma-wall interaction * spectral line profiles * Doppler shift * ion velocity gradients
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.288, year: 2013

High-resolution x-ray spectroscopy was applied to study the ion back-scattering in plasma–wall interaction. In experiments carried out on the Prague Asterix Laser System (PALS), the energetic ions produced at thin laser burnt-through Al foil impacted the secondary C target where they were decelerated, trapped and scattered in radial and backward directions. The environmental conditions in near-wall plasmas were analyzed using the high-dispersion x-ray spectroscopy and temporally-resolved x-ray imaging. The radial expansion of ions back-scattered in the near-wall region was directly observed via the Doppler effect induced splitting of the Al Heα intercombination line. The experimentally observed line splitting was modeled using a combination of the 2D arbitrary Lagrangian Eulerian hydrodynamics code PALE with the multifluid code MULTIF and spectrally postprocessed using HULLAC atomic model builder and CRETIN collisional-radiative code.
Permanent Link: http://hdl.handle.net/11104/0223650