Measurement of the spatial coherence buildup in a discharge pumped table-top soft x-ray laser
Date
1997
Authors
Rocca, Jorge J., author
Benware, B. R., author
Moreno, C. H., author
Chilla, J. L. A., author
Marconi, M. C., author
American Physical Society, publisher
Journal Title
Journal ISSN
Volume Title
Abstract
We have measured the variation of the spatial coherence with plasma column length in a saturated table-top 46.9-nm Ne-like Ar capillary discharge soft x-ray amplifier for lengths up to 16.4 cm. The measurements, which are in good agreement with time dependent wave-optics model computations, provide the first experimental evidence of a monotonic increase of the coherence with length in a soft x-ray amplifier. The variation of the coherence across the beam profile was also studied. Off axis, the coherence is larger in the tangential than in the radial direction.