Double layer acceleration of ions with differently charged states in a laser induced plasma
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Published:2023-07-30
Issue:8
Volume:129
Page:
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ISSN:0947-8396
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Container-title:Applied Physics A
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language:en
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Short-container-title:Appl. Phys. A
Author:
Yao Xiang,
Schneider Christof W.ORCID,
Bulgakova Nadezhda M.ORCID,
Bulgakov Alexander V.ORCID,
Lippert ThomasORCID
Abstract
AbstractThe 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/cm2), 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.
Funder
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Ministerstvo Vnitra České Republiky
PSI - Paul Scherrer Institute
Publisher
Springer Science and Business Media LLC
Subject
General Materials Science,General Chemistry
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