Matter and Radiation at Extremes, Volume. 5, Issue 4, 045401(2020)
Review of nonlinear effects under TW-power PS pulses amplification in GARPUN-MTW Ti:sapphire-KrF laser facility
Fig. 1. (a) Pulse multiplexer, oscilloscope traces (b) of amplified USP train and (c) a single USP. The USP length is integrated by the PD.
Fig. 2. Layouts of USP amplification in Berdysh preamplifier and GARPUN amplifier, with a different number of passes: (a) 4 + 2; (b) 2 + 2 with a double pass in the preamplifier shown only; (c) 4 + 1 with one pass in the amplifier shown only. The numbers 1…5 designate the positions of laser-beam distribution measurements in
Fig. 3. Energy of the USP train at the output of the amplifier chain in dependence on input energy in various amplification schemes.
Fig. 4. UV converter images at various distances from the final amplifier: (a)
Fig. 5. UV converter images in different positions 1–5 along the amplification pass in (4 + 2) layout [
Fig. 6. UV converter images at various distances,
Fig. 7. USP spectra (a)
Fig. 8. Layout of experiments on (a) filaments defocusing in Xe cell and (b) multiple filamentation suspension.
Fig. 9. The same fragment of the laser beam cross-section for the USP passed through a cell (a) filled with air, (b) evacuated to 10−5 atm, and (c) filled with Xe at 0.1 atm. (d) Corresponding intensity profiles in selected filaments highlighted by a white circle (1) in air, (2) vacuum, and (3) Xe. For clarity, the curves have been moved along the vertical axis. Intensities in images increase as the color sequence: purple, dark blue, blue, green, yellow, and red.
Fig. 10. UV converter images of the USP passing through an Xe cell and focused by an
Fig. 11. (a) Intensity distribution of radiation passed through the Xe cell in the focus of the
Fig. 12. (a) Layout of CaF2 transmittance measurements: 1–focusing and collecting lenses, 2–CaF2 sample, 3–iris aperture, 4–spectrometer: (I) transmitted radiation without the sample and (II) with the sample; (b) normalized spectra of 0.75 GW USP passed through (1) air and (2) CaF2 sample; line segment designates the KrF gain band of ∼2.5 nm; (c) experimental dependence of CaF2 transmittance on the incident USP intensity with approximation; filaments intensity range is shadowed.
Fig. 13. Side view of CaF2 fluorescence under the propagation of multiply filamented beam.
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V. D. Zvorykin, A. V. Shutov, N. N. Ustinovskii. Review of nonlinear effects under TW-power PS pulses amplification in GARPUN-MTW Ti:sapphire-KrF laser facility[J]. Matter and Radiation at Extremes, 2020, 5(4): 045401
Category: Inertial Confinement Fusion Physics
Received: Feb. 7, 2020
Accepted: Apr. 19, 2020
Published Online: Nov. 25, 2020
The Author Email: Zvorykin V. D. (zvorykin@sci.lebedev.ru)