| Issue |
Europhys. Lett.
Volume 74, Number 5, June 2006
|
|
|---|---|---|
| Page(s) | 823 - 829 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2006-10038-4 | |
| Published online | 10 May 2006 | |
Origin of microstructures in picosecond X-ray laser beams
1
LIXAM, Laboratoire d'Interaction du rayonnement X Avec la Matière CNRS UMR 8624, Université Paris Sud - Bâtiment 350, 91405 Orsay Cedex, France
2
LCFIO, Laboratoire Charles Fabry de l'Institut d'Optique, Centre scientifique d'Orsay Bâtiment 503, 91403 Orsay Cedex, France
Received:
2
January
2006
Accepted:
6
April
2006
Beam sections of transient collisional excitation (TCE) soft X-ray lasers exhibit highly contrasted intensity modulations forming complex patterns. We present model calculations that reproduce these experimental observations both qualitatively and quantitatively. The low spatial coherence, high longitudinal coherence and short pulse duration of the source are shown to control the visibility of the beam structures. Comparison with other types of laser-based soft X-ray lasers is discussed. We derive simple relationships that relate the spatial and temporal characteristics of the emitting source to the main features of the beam small-scale structures.
PACS: 42.55.Vc – X- and gamma-ray lasers / 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 42.60.Jf – Beam characteristics: profile, intensity, and power; spatial pattern formation
© EDP Sciences, 2006
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