High-resolution x-ray spectromicroscopy observations of 1 MeV ions under far from relativistic laser beam channeling in N<sub>2</sub>O clusters

A. Ya. Faenov; A. I. Magunov; T. A. Pikuz; I. Yu. Skobelev; K. Y. Kim; V. Kumarappan; H. M. Milchberg

doi:10.1117/12.675470

3 February 2006 High-resolution x-ray spectromicroscopy observations of 1 MeV ions under far from relativistic laser beam channeling in N₂O clusters

A. Ya. Faenov, A. I. Magunov, T. A. Pikuz, I. Yu. Skobelev, K. Y. Kim, V. Kumarappan, H. M. Milchberg

Author Affiliations +

Proceedings Volume 5975, Topical Problems of Nonlinear Wave Physics; 597502 (2006) https://doi.org/10.1117/12.675470
Event: Topical Problems of Nonlinear Wave Physics, 2005, St. Petersburg, Russian Federation

Abstract

High-resolution X-Ray spectromicroscopy methods were used for investigations of fs laser interaction with N₂O cluster media. Elongated (up to 8.5 mm) femtosecond laser self-channeling in N₂O cluster media under sufficiently low laser intensity (0.5-4x10¹⁷ W/cm²) was observed. Results are revealing a strong macroscopic effect on laser beams owing to their interaction with a gas of clusters. This has occurred at moderate pulse intensities, so the effect is unrelated to either relativistic self-focusing or ponderomotive filamentation. Enough homogeneous multicharged ions plasma with bulk electron temperature around 100 eV was observed along the plasma channel. The spectral lines shapes of the H- and He-like Oxygen ions demonstrated the presence of strong "blue wings", which are caused by Doppler-shifted lines radiation from the essential fraction of ions (~10^-2 - 10^-3) with energies 0.1 - 1.5 MeV. The slope of Doppler-shifted lines radiation is good approximated by ~300 KeV ion temperatures.

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A. Ya. Faenov, A. I. Magunov, T. A. Pikuz, I. Yu. Skobelev, K. Y. Kim, V. Kumarappan, and H. M. Milchberg "High-resolution x-ray spectromicroscopy observations of 1 MeV ions under far from relativistic laser beam channeling in N₂O clusters", Proc. SPIE 5975, Topical Problems of Nonlinear Wave Physics, 597502 (3 February 2006); https://doi.org/10.1117/12.675470

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