Journal
IEEE TRANSACTIONS ON PLASMA SCIENCE
Volume 36, Issue 4, Pages 1866-1871Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPS.2008.927141
Keywords
circular polarization (CIP); ion acceleration; laser-plasma accelerators; ponderomotive force (PF); radiation pressure acceleration (RPA)
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Funding
- Italian Ministry for University and Research (MIUR)
- talian National Research Council-National Institute for the Physics of Matter (CNR-INFM)
- Interuniversity Consortium High Performance Systems (CINECA), Bologna, Italy
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Ponderomotive (or radiation pressure) acceleration is a route to the generation of high-energy ions in laser-solid interactions, which does not rely on the generation of fast electrons. It may be optimized by the use of circularly polarized (CP) laser pulses rather than linearly polarized (LP) ones, since for CP, fast electron generation is strongly inhibited, quenching competing mechanisms such as target normal sheath acceleration. We present a comparison of 1-D and 2-D particle-in-cell simulations for CP and LP, which shows the potential of CP pulses for ion acceleration. The comparison also enables us to discriminate pure ponderomotive effects from those due to fast electrons, aiding the understanding of basic mechanisms of ion acceleration and surface rippling.
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