Distance-of-flight spectra of charge density of ions generated with a low laser intensity

Plasma Physics by Laser and Applications 2013 Conference

Krása, J.^1 ; Velardi, L.^2,3 ; Lorusso, A.^2 ; Delle Side, D.^2,3 ; Nassisi, V.^2,3

Institute of Physics, ASCR, V.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic^1

LEAS, Dipartimento di Matematica e Fisica, Università Del Salento, Italy^2

INFN Sezione di Lecce, Via Arnesano sn, 73100 Lecce, Italy^3

关键词: Density profile;    Ion currents;    KrF excimer laser;    Laser intensities;    Laser ion sources;    Laser irradiance;    Time of flight detectors;    Time-resolved;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/508/1/012004/pdf
DOI  :  10.1088/1742-6596/508/1/012004

来源: IOP

【 摘 要 】

A charge density profile of ions emitted from a laser ion source is derived from a time-resolved current of ions collected with a time-of-flight detector. This relationship between the density profile over path of ions and an ion current observed far from the ion source is based on a similarity relationship for ion currents with "frozen" charges observed at different distances from the target. In this contribution, we present distance-of-flight spectra of the charge density of ions emitted from various plasmas driven by a Compex 205 KrF excimer laser (λ=248 nm, τFWHM=23ns) which works at laser irradiances between 108and 1010W/cm2.