Europhys. Lett.
Volume 63, Number 5, September 2003
Page(s) 681 - 686
Section General
Published online 01 November 2003
DOI: 10.1209/epl/i2003-00588-3
Europhys. Lett., 63 (5) , pp. 681-686 (2003)

High-resolution imaging of a soft-X-ray laser beam by color centers excitation in lithium fluoride crystals

G. Tomassetti1, A. Ritucci1, A. Reale1, L. Palladino1, L. Reale1, L. Arrizza1, G. Baldacchini2, F. Bonfigli2, F. Flora2, L. Mezi2, R. M. Montereali2, S. V. Kukhlevsky3, A. Faenov4, T. Pikuz4 and J. Kaiser5

1  Dipartimento di Fisica, Università dell'Aquila, gc LNGS dell' INFN, INFM 67010 Coppito, L'Aquila, Italy
2  ENEA Dipartimento Innovazione, Divisione Fisica Applicata, CRE Frascati C.P. 65, 00044 Frascati, Italy
3  Department of Experimental Physics, University of Pecs Ifjusag u. 6, Pecs, 7624, Hungary
4  MISDC of VNIIFTRI - Mendeleevo, Moscow Region, 141570, Russia
5  Institute of Physical Engineering, University of Technology Brno, Technicka 2, 616 69 Brno, Czech Repuplic

(Received 17 April 2003; accepted in final form 27 June 2003)

Stable color center production in lithium fluoride crystals has been applied to single-shot high-spatial-resolution imaging of a 2 $\un{ns}$ long, 46.9 $\un{nm}$ capillary discharge soft-X-ray laser pulse. Images of the unfocused beam and of the beam focused by a multi-layer mirror were recorded. The $\chem{LiF}$ crystal sensitivity was sufficient to impress high-contrast photo-luminescent patterns with single-pulse irradiation on an area up to 40 $\un{mm^2}$. Interference fringes due to the soft-X-ray laser coherence were observed. The results demonstrate the potential of $\chem{LiF}$ crystals and films as a sub-micrometer resolution two-dimensional imaging tool for single-shot soft-X-ray laser applications.

07.85.Fv - X- and $\gamma$-ray sources, mirrors, gratings, and detectors.
42.55.Vc - X- and $\gamma$-ray lasers.
42.60.Jf - Beam characteristics: profile, intensity, and power; spatial pattern formation.

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