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

Here, 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. Lastly, results show that this new engineered approach is a valid alternative, guaranteeing a low energy spread with a higher level of controllability.
ORCiD logo [1] ;  [2] ;  [3] ; ORCiD logo [4] ; ORCiD logo [1]
  1. Univ. de Lisboa, Lisbon (Portugal). Inst. of Superior Tecnico (IST)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Ruhr Univ., Bochum (Germany). Inst. fur Theoretische Physik, Lehrstuhl IV: Weltraum- und Astrophysik
  4. Univ. Inst. of Lisbon (ISCTE -IUL), Lisbon (Portugal). Dept. of Information Science and Technology (DCTI)
Publication Date:
Grant/Contract Number:
AC02-76SF00515; 267841; 695008
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 3; Journal ID: ISSN 0741-3335
IOP Science
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE; European Research Council (ERC)
Country of Publication:
United States
43 PARTICLE ACCELERATORS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Collisionless shock wave acceleration; electrostatic shocks; laser-driven shock acceleration; compact accelerators; PIC simulations
OSTI Identifier: