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Proceedings Paper

Absorption Spectroscopy Of A Radiatively Heated Aluminium Layer
Author(s): C. Chenais-Popovics; C. Fievet; J. P. Geindre; J. C. Gauthier; E. Luc-Koenig; J. F. Wyart; H. Pepin; M. Chaker
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Paper Abstract

We present here a direct diagnostic of the shallow temperature gradient created in the very dense region of a laser irradiated target by X-UV radiation. A multilayered target composed of a plastic substrate covered with a thin samarium layer is irradiated with a 0.26 μm wavelength laser pulse at irradiances of 3. 1014 W/cm2. A thin aluminium layer is inserted in the plastic as an absorbing tracer at different distances from the samarium. Kα absorption lines appear in the samarium quasi-continuum emission around 1.5 keV. The analysis of these lines gives the temperature of the aluminium layer. A shallow temperature gradient between 40 and 100 eV is measured and compared with radiative hydrocode simulations which predict that the X-UV emission of samarium around 400 eV create a radiative heat wave responsible of the observed temperature gradient.

Paper Details

Date Published: 27 November 1989
PDF: 6 pages
Proc. SPIE 1140, X-Ray Instrumentation in Medicine and Biology, Plasma Physics, Astrophysics, and Synchrotron Radiation, (27 November 1989); doi: 10.1117/12.961881
Show Author Affiliations
C. Chenais-Popovics, Laboratoire de Physique des Milieux Ionises (France)
C. Fievet, Laboratoire de Phvsiaue des Milieux Ionises (France)
J. P. Geindre, Laboratoire de Physique des Milieux Ionises (France)
J. C. Gauthier, Laboratoire de Physique des Milieux Ionises (France)
E. Luc-Koenig, Universite Paris XI (France)
J. F. Wyart, UniversIte Paris XI (France)
H. Pepin, Institut National de la Recherche Scientifique-Energie (Canada)
M. Chaker, Institut National de la Recherche Scientifique-Energie (Canada)


Published in SPIE Proceedings Vol. 1140:
X-Ray Instrumentation in Medicine and Biology, Plasma Physics, Astrophysics, and Synchrotron Radiation

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