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21Complex Systems of Charged Particles and their Interactions with Electromagnetic Radiation 2018
LASER-ION ACCELERATION AT ELI-NP
O. Budriga1, E. d'Humieres2, L. E. Ionel1, M. Budriga1, M. Carabas3
1 National Institute for Laser, Plasma and Radiation Physics, Magurele, Romania 2Universite de Bordeaux - CNRS - CEA, CELIA, Talence, France 3Faculty of Automatic Control and Computers, University POLITEHNICA of Bucharest, Romania
We investigate the interaction of an ultra-high intensity laser pulse with plastic foil and flattop cone targets coated with nanospheres. The laser pulse has the parameters of the 10 PW lasers from ELI-NP. We find the optimal geometric dimensions of the foil, the flat-top cone and the nanospheres to obtain monoenergetic beams of accelerated ions with low angular divergence. This study will allow one to prepare and optimize first laser-ion acceleration experiments on ELI-NP using micro-cone targets.
Fig. 1 Maximum proton energy versus time Fig. 2 Maximum prot°n energy versus time fof for different foil target geometries. different plastic micro-cone target geometries.
We can conclude that a plastic foil target of 40 nm thickness with nanospheres of 40 nm in diameter has the optimum ratio between the nanospheres diameter and the thickness of the foil for ion acceleration. We notice that the cone target coated with nanospheres is a better structure for ion acceleration than the simple cone target. According to these numerical studies the most efficient target for ion acceleration from the studied cases is the coated cone target with the thickness of the flat-top foil of 40 nm and the diameter of the nanosphere of 80 nm.
This work has been financed by the national project PN III 5/5.1/ELI-RO, No. 16 ELI/2017 ("SIMULATE"), under the financial support of Institute for Atomic Physics - IFA.
