Interaction of a pulsed gas target with Nd-laser radiation and laser-produced plasma

Eugene N. Ragozin; Vladimir E. Levashov; Konstantin N,. Mednikov; Alexander S. Pirozhkov; Pavel V. Sasorov

doi:10.1117/12.450964

23 October 2002 Interaction of a pulsed gas target with Nd-laser radiation and laser-produced plasma

Eugene N. Ragozin, Vladimir E. Levashov, Konstantin N,. Mednikov, Alexander S. Pirozhkov, Pavel V. Sasorov

Proceedings Volume 4781, Advances in Laboratory-Based X-Ray Sources and Optics III; (2002) https://doi.org/10.1117/12.450964
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

A spectroscopic investigation was made of a debris-free soft X-ray radiation source driven by the pulses of a solid-state laser (0.4 J, 6 ns, 1.08 microns) focused in a pulsed xenon jet. Source images at a wavelength of 180 Å were obtained using a concave soft X-ray multilayer mirror. To obtain space-resolved source emission spectra above 125 Å, advantage was taken of a stigmatic high-transmission broadband diffraction spectrograph. The spectrograph comprised a large-aperture transmission diffraction grating (1000 or 5000 lines/mm) and a novel aperiodic focusing normal-incidence multilayer mirror possessing a uniform reflectivity in the 125 -250 Å range. The yield of soft X-ray radiation was determined with the aid of a fast absolute-calibrated X-ray AXUV-5 photodiode. The photoabsorption in the peripheral gas-jet regions was found to play a significant role in the soft X-ray yield. Numerical model simulations were performed to elucidate the plasma dynamics. The soft X-ray spectrograph was also employed to study the interaction of the pulsed gas jet with the incident stream of the plasma produced by laser irradiation of a ~1-cm distant solid target. The soft X-ray spectra arising from the interaction were attributed to the charge exchange of multiply charged plasma ions with gas jet atoms.

Citation Download Citation

Eugene N. Ragozin, Vladimir E. Levashov, Konstantin N,. Mednikov, Alexander S. Pirozhkov, and Pavel V. Sasorov "Interaction of a pulsed gas target with Nd-laser radiation and laser-produced plasma", Proc. SPIE 4781, Advances in Laboratory-Based X-Ray Sources and Optics III, (23 October 2002); https://doi.org/10.1117/12.450964

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