Investigation of a highly saturated soft X-ray amplification in a capillary discharge plasma waveguide

A. Ritucci, G. Tomassetti, A. Reale, L. Palladino, L. Reale, F. Flora, L. Mezi, S.V. Kukhlevsky, A. Faenov, T. Pikuz

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Abstract

The characterization of the laser beam intensity distribution of a highly saturated 46.9-nm soft X-ray laser excited by capillary discharges is reported. The laser produces a total output energy of 300 μJ/pulse by amplification in plasma channels having lengths up to 0.45 m. A regime of laser amplification, which is almost free from the effect of the refraction defocusing, is experimentally determined. This regime produces a soft X-ray laser beam with an intense sub-milliradiant component. In the longer active medium the laser intensity distribution reaches the divergence of 0.6 mrad, which approaches the limit of diffraction. A comparison of the experimental results with the simulations performed with a ray-tracing code shows that the small divergence of the beam could be attributed to the effect of a weak index waveguiding of the laser beam through the long plasma channels.
Original languageEnglish
Pages (from-to)965 - 969
Number of pages5
JournalApplied Physics B: Lasers and Optics
Volume78
Issue number7-8
DOIs
Publication statusPublished - 2004
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

Ritucci, A., Tomassetti, G., Reale, A., Palladino, L., Reale, L., Flora, F., ... Pikuz, T. (2004). Investigation of a highly saturated soft X-ray amplification in a capillary discharge plasma waveguide. Applied Physics B: Lasers and Optics, 78(7-8), 965 - 969. https://doi.org/10.1007/s00340-004-1442-5