Characteristics of target polarization by laser ablation

0456863 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GAP205/12/0454; GA MŠMT EE2.3.20.0279
Grant ostatní: LaserZdroj (OP VK 3)(XE) CZ.1.07/2.3.00/20.0279
Institucionální podpora: RVO:68378271
Klíčová slova: Target current in laser-produced plasmas * positive and negative target polarization * space structure of ion front
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 1.649, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0257332