Double layer acceleration of ions with differently charged states in a laser induced plasma.

Autor: Yao X; Research With Neutrons and Muons Division, Paul Scherrer Institut, 5232 Villigen-PSI, Switzerland., Schneider CW; Research With Neutrons and Muons Division, Paul Scherrer Institut, 5232 Villigen-PSI, Switzerland., Bulgakova NM; HiLASE Centre, Institute of Physics ASCR, Za Radnicí 828, 25241 Dolní Břežany, Czech Republic., Bulgakov AV; HiLASE Centre, Institute of Physics ASCR, Za Radnicí 828, 25241 Dolní Břežany, Czech Republic., Lippert T; Research With Neutrons and Muons Division, Paul Scherrer Institut, 5232 Villigen-PSI, Switzerland.; Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zurich, Switzerland.
Jazyk: angličtina
Zdroj: Applied physics. A, Materials science & processing [Appl Phys A Mater Sci Process] 2023; Vol. 129 (8), pp. 590. Date of Electronic Publication: 2023 Jul 30.
DOI: 10.1007/s00339-023-06840-6
Abstrakt: The electric field driven acceleration of plasma ions is an intrinsic effect in laser-induced plasma plumes and is responsible for the generation of high-energy ions. At high laser fluences (≥ 2 J/cm 2 ), multiply charged ions are formed and affect the plume expansion dynamics. In this paper, we used kinetic energy-resolved mass spectrometry to investigate the relative abundance and kinetic energy distributions of singly- and doubly-charged ions produced by KrF-laser ablation of nine different oxide targets. The doubly charged metal ions with a lower mass-to-charge ( m / z ) ratio show narrow energy distributions at high average kinetic energies coinciding with the cutoff energies for the singly-charged ion distributions. The observation suggests that the recombination of higher charged ions plays a prominent role in the formation of the high-energy tail for singly-charged ions. The results are discussed in terms of component volatility and a dynamic double layer, where ions with different m / z values experience different accelerations.
Competing Interests: Conflict of interestThe authors have no conflicts to disclose.
(© The Author(s) 2023.)
Databáze: MEDLINE
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