Abstract
A high-power pulsed laser is focused onto a solid-hydrogen target to accelerate forward a collimated stream of protons in the range 0.1-1 MeV, carrying a very high energy of about 30 J (~5% laser-ion conversion efficiency) and extremely large charge of about ~0.1 mC per laser pulse. This result is achieved for the first time through the combination of a sophisticated target system (H2 thin ribbon) operating at cryogenic temperature (~10 K) and a very hot H plasma (~300 keV "hot electron" temperature) generated by a subnanosecond laser with an intensity of ~3 × 1016 W/cm2. Both the H plasma and the accelerated proton beam are fully characterized by in situ and ex situ diagnostics. Results obtained using the ELISE (experiments on laser interaction with solid hydrogen) H2 target delivery system at PALS (Prague) kJ-class laser facility are presented and discussed along with potential multidisciplinary applications.
Original language | English |
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Article number | 041030 |
Journal | Physical Review X |
Volume | 6 |
Issue number | 4 |
DOIs | |
Publication status | Published - 08 Nov 2016 |
Externally published | Yes |
Keywords
- Plasma physics
ASJC Scopus subject areas
- General Physics and Astronomy