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- Title
Protons and ion acceleration from thick targets at 1010 W/cm2 laser pulse intensity.
- Authors
Torrisi, L.; Caridi, F.; Giuffrida, L.
- Abstract
Proton ion acceleration via laser-generated plasma is investigated at relatively low laser pulse intensity, on the order of 1010 W/cm2. Time-of-flight technique is employed to measure the ion energy and the relative yield. An ion collector and an ion energy analyzer are used with this aim and to distinguish the number of charge states of the produced ions. The kinetic energy and the emission yield are measured through a consolidated theory, which assumes that the ion emission follows the Coulomb-Boltzmann-Shifted function. The proton stream is generated by thin and thick hydrogenated targets and it is dependent on the free electron states, which increase the laser absorption coefficient and the ion acceleration. The maximum proton energy, of about 200 eV, and the maximum proton amount can be obtained with thick metallic hydrogenated materials, such as the titanium hydrate TiH2.
- Subjects
PROTONS; ION accelerators; ULTRASHORT laser pulses; FORCE &; energy; TITANIUM; HYDRATES; ELECTRONS
- Publication
Laser & Particle Beams, 2011, Vol 29, Issue 1, p29
- ISSN
0263-0346
- Publication type
Article
- DOI
10.1017/S0263034610000728