Ion acceleration in electrostatic collisionless shock:on the optimal density profile for quasi-monoenergetic beams

Boella, Elisabetta and Fiuza, Frederico and Stockem Novo, Anne and Fonseca, Ricardo and Silva Miguel, Luís (2018) Ion acceleration in electrostatic collisionless shock:on the optimal density profile for quasi-monoenergetic beams. Plasma Physics and Controlled Fusion, 60 (3). ISSN 0741-3335

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Abstract

A numerical study on ion acceleration in electrostatic shock waves is presented, with the aim of determining the best plasma configuration to achieve quasi-monoenergetic ion beams in laser-driven systems. It was recently shown that tailored near-critical density plasmas characterized by a long-scale decreasing rear density profile lead to beams with low energy spread (Fiúza et al 2012 Phys. Rev. Lett. 109 215001). In this work, a detailed parameter scan investigating different plasma scale lengths is carried out. As result, the optimal plasma spatial scale length that allows for minimizing the energy spread while ensuring a significant reflection of ions by the shock is identified. Furthermore, a new configuration where the required profile has been obtained by coupling micro layers of different densities is proposed. Results show that this new engineered approach is a valid alternative, guaranteeing a low energy spread with a higher level of controllability.

Item Type:
Journal Article
Journal or Publication Title:
Plasma Physics and Controlled Fusion
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
132505
Deposited By:
Deposited On:
10 Apr 2019 07:40
Refereed?:
Yes
Published?:
Published
Last Modified:
20 Oct 2020 07:10