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High-Z front surface ion acceleration in relativistic femtosecond laser-plasma interaction at different contrast levelтезисы доклада
- Авторы: Mordvintsev I.M., Ivanov K.A., Shulyapov S.A., Savel’ev A.B.
- Сборник: Book of Abstracts "IV International Conference on Ultrafast Optical Science (UltrafastLight-2020)"
- Тезисы
- Год издания: 2020
- Первая страница: 41
- Последняя страница: 41
- Аннотация: The experimental results on the relativistic laser-plasma interactions of femtosecond laser pulse with nanoscale structured and flat targets with contrastcontrol are presented. In our experiments we used an ultrafast pulse from theTi:Sa laser system (pulse duration - 50 fs, energy on target - up to 30 mJ, wavelength - 800 nm, repetition rate - 10 Hz, peak intensity - up to 5×1018 W/cm2).The experiments were conducted with contrast control by special controlled prepulse with different delay relative to the main pulse. The controlled prepulsewas created by Nd:YAG laser with active Q-switching, a wavelength of 532 nm.(second harmonic - 1064 nm.), pulse duration - 6 ns., pulse energy - up to 250 mJat the main harmonic. Also, experiments were conducted with ultrahigh (withXPW contrast level < 10−10) contrast level. Ions were registered with the usetime-of-flight magnet spectrometer with the charge-to-mass (Z/M) separationand Thomson parabola mass spectrometer.In experiments with low contrast level there are no high energy ions. Also,it was demonstrated that with high contrast level there is no significant difference between flat bulk and nanoscale structured target. In experiments withultrahigh contrast high-Z ions (up to Si12+ and even fully stripped Si14+, whichnot registered in experiments with high contrast level) were registered. Also itwas demonstrated significant increase in ion energy and ion flux depending onnanostructured target compared to experiment with flat target.Experiments with nanostructured targets was supported by Russian ScienceFoundation grant No 18-79-10160. Ion diagnostic development and experimentswith contrast control by the artificial prepulse were supported by Russian Fundfor Basic Research under grants No 18-32-00416 and 19-02-00104
- Добавил в систему: Мордвинцев Илья Михайлович