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Tracking ground state Ba+ ions in an expanding laser–plasma plume using time-resolved vacuum ultraviolet photoionization imaging

Published online by Cambridge University Press:  01 July 2004

J.S. HIRSCH ,
K.D. KAVANAGH ,
E.T. KENNEDY ,
J.T. COSTELLO ,
P. NICOLOSI  and
L. POLETTO
J.S. HIRSCH
Affiliation:
National Centre for Plasma Science and Technology (NCPST) and School of Physical Sciences, Dublin City University, Dublin 9, Ireland
K.D. KAVANAGH
Affiliation:
National Centre for Plasma Science and Technology (NCPST) and School of Physical Sciences, Dublin City University, Dublin 9, Ireland
E.T. KENNEDY
Affiliation:
National Centre for Plasma Science and Technology (NCPST) and School of Physical Sciences, Dublin City University, Dublin 9, Ireland
J.T. COSTELLO
Affiliation:
National Centre for Plasma Science and Technology (NCPST) and School of Physical Sciences, Dublin City University, Dublin 9, Ireland
P. NICOLOSI
Affiliation:
Istituto Nazionale per la Fisica della Materia, Universita di Padova, Via Granenigo, Padova, Italia
L. POLETTO
Affiliation:
Istituto Nazionale per la Fisica della Materia, Universita di Padova, Via Granenigo, Padova, Italia
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Abstract

We report results from a study of the integrated column density and expansion dynamics of ground-state-selected Ba+ ions in a laser–plasma plume using a new experimental system—VPIF (vacuum-ultraviolet photoabsorption imaging facility). The ions are tracked by recording the attenuation of a pulsed and collimated vacuum ultraviolet beam, tuned to the 5p–6d inner-shell resonance of singly ionized barium, as the expanding plasma plume moves across it. The attenuated beam is allowed to fall on a CCD array where the spatial distribution of the absorption is recorded. Time-resolved ion velocity and integrated column density maps are readily extracted from the photoionization images.

Keywords

BariumImagingLaser plasmaPhotoabsorptionVacuum ultraviolet
Type
Research Article
Information
Laser and Particle Beams , Volume 22 , Issue 3 , July 2004 , pp. 207 - 213
Copyright
© 2004 Cambridge University Press

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