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Shock Ion Acceleration by an Ultrashort Circularly Polarized Laser Pulse Via Relativistic Transparency in an Exploded Target
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- Authors
- Young-Kuk Kim, Myung-Hoon Cho, Hyung Seon Song, Teyoun Kang, Hyung Ju Park, Moon Youn Jung, Min Sup Hur
- Issue Date
- 2015-10
- Citation
- Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, v.92, no.4, pp.1-6
- ISSN
- 1539-3755
- Publisher
- American Physical Society(APS)
- Language
- English
- Type
- Journal Article
- Abstract
- We investigated ion acceleration by an electrostatic shock in an exploded target irradiated by an ultrashort, circularly polarized laser pulse by means of one- and three-dimensional particle-in-cell simulations. We discovered that the laser field penetrating via relativistic transparency (RT) rapidly heated the upstream electron plasma to enable the formation of a high-speed electrostatic shock. Owing to the RT-based rapid heating and the fast compression of the initial density spike by a circularly polarized pulse, a new regime of the shock ion acceleration driven by an ultrashort (20-40 fs), moderately intense (1-1.4 PW) laser pulse is envisaged. This regime enables more efficient shock ion acceleration under a limited total pulse energy than a linearly polarized pulse with crystal laser systems of {\\lambda}~1μm.
- KSP Keywords
- Circularly polarized laser pulse, Electron plasma, High Speed, Ion acceleration, Laser field, Linearly polarized, Particle-in-Cell simulations, Pulse energy, Rapid heating, Three dimensional(3D)