INCREASING THE EFFICIENCY OF LASER ACCELERATION OF PROTONS USING ULTRA-THIN TARGETS

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Abstract

The results of laser acceleration of protons from aluminum targets 6 μm thick and ultra-thin diamond-like carbon films 100 nm thick when they are irradiated with femtosecond laser pulses with a peak intensity of up to 5 × 1020 W/cm2 are presented. It is shown that decreasing the target thickness from 6 μm to 100 nm does not lead to a significant change in the maximum proton energies, but contributes to an increase in the angular yield and the laser energy conversion coefficient. This effect is due to an increase in the number of protons in the low-energy part of the spectra, which is reflected in a twofold increase in the conversion coefficient.

About the authors

A. A Bushukhin

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Email: dep5@vniitf.ru
Snezhinsk, Russia

K. V Safronov

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

S. A Gorokhov

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

V. A Flegentov

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

D. O Zamuraev

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

A. L Shamraev

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

S. F Kovaleva

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

N. A Fedorov

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

A. V Potapov

Russian Federal Nuclear Center—Zababakhin All-Russia Research Institute of Technical Physics

Snezhinsk, Russia

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