Proton emission from laser - generated plasmas at different intensities

• Autorzy: Torrisi L. , Cutroneo M. , Cavallaro S. , Giuffrida L. , Margarone D.
• Konferencja: International Conference on Research and Applications of Plasmas, Plasma-2011, 12-16 September 2011, Warsaw, Poland
• Języki publikacji: EN

Abstrakty

EN

Proton acceleration from laser-generated plasma is carried out at intensities ranging between 1010 and 1019 W/cm2, by using ns, ps and fs laser systems. The high energy density transferred from the pulsed laser beam into the solid target generates ionized species released in vacuum from the solid surface. Fast electrons followed by slower ions build up a double-layer and a consequent electric field, which is responsible for the ion acceleration mainly along the target-normal. Polymeric targets containing nanostructures (or metallic species) with high laser absorbing capacity, and metallic hydrates (or H-enriched metals), permit to increase the plasma temperature and density, thus to improve the proton beam energy and current. Thick targets and low laser intensities, operating in repetitive pulse, allows to generate high currents of low energy protons. On the other hand, through the use of thin targets and high laser intensities enabled the generation of high proton energies, above 1 MeV.

Słowa kluczowe

EN

laser-generated plasma; proton acceleration

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2012
• Tom: Vol. 57, No. 2
• Strony: 237--240
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Torrisi L.

autor

Cutroneo M.

autor

Cavallaro S.

autor

Giuffrida L.

autor

Margarone D.

• Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare (INFN), (National Institute for Nuclear Physics), 62 S. Sofia Str., 95123 Catania, Italy and Dipartimento di Fisica, Universitŕ di Messina, Ctr. da Papardo-Sperone 31, 98166 Messina,

Bibliografia

• 1. Harres K, Schollmeier M, Brambrink E et al. (2008) Development and calibration of a Thomson parabola with microchannel plate for the detection of laser-accelerated MeV ions. Rev Sci Instrum 79:093306(1–9)
• 2. Laska L, Jungwirth K, Krása J et al. (2006) Self-focusing in processes of laser generation of highly-charged and high-energy heavy ions. Laser Part Beams 24:175–179
• 3. Krása J, Giuffrida L Margarone D, et al. (2011) Full characterization of laser-accelerated ion beams using Faraday cup, silicon carbide, and single-crystal diamond detectors. J Appl Phys 109:103302(1–8)
• 4. Torrisi L, Caridi F, Giuffrida L (2010) Comparison of Pd plasmas produced at 532 nm and 1064 nm by a Nd:YAG laser ablation. Nucl Instrum Methods Phys Res B 268:2285–2291
• 5. Torrisi L, Minniti T, Giuffrida L (2010) Data elaboration of proton beams produced by high-energy laser-generated plasmas. Radiat Eff Defects Solids: Inc Plasma Sci Technol 165:721–729
• 6.Cor- Woryna E, Parys P, Wolowski J, Mroz W (1996) puscular diagnostics and processing methods applied in investigations of laser-produced plasma as a source of highly ionized ions. Laser Part Beams 14:293–321