Characteristics of target polarization by laser ablation

0456863 - FZÚ 2016 RIV US eng J - Journal Article
Krása, Josef - Delle Side, D. - Giuffreda, E. - Nassisi, V.
Characteristics of target polarization by laser ablation.
Laser and Particle Beams. Roč. 33, č. 4 (2015), 601-605. ISSN 0263-0346. E-ISSN 1469-803X
R&D Projects: GA ČR GAP205/12/0454; GA MŠMT EE2.3.20.0279
Grant - others:LaserZdroj (OP VK 3)(XE) CZ.1.07/2.3.00/20.0279
Institutional support: RVO:68378271
Keywords : Target current in laser-produced plasmas * positive and negative target polarization * space structure of ion front
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.649, year: 2015

Experimental results are obtained concerning the target polarization, which aptly characterizes the laser ablation. The charge separation in the laser-produced plasma, structure of the ion front, and the current of fast electrons expanding into the vacuum chamber ahead of ions are of crucial importance for the interpretation of multi-peak structure of target currents appearing much later than the laser pulse. Of particular interest is the correlation between the partial maxima in the time-resolved target current and the square root of mass number of ionized species. The late-time negative charging of targets provides evidence for production of very slow ions by ionization of neutrals ablated at the target crater by radiation from plasma produced by 23 ns excimer krypton fluoride laser.
Permanent Link: http://hdl.handle.net/11104/0257332