Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.k7004m&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
High-intensity laser and beam-matter interactions are the basis of a rapidly emerging area of physics research, which could be classified as "extreme' plasma physics. For example, today's state-of-the-art lasers and particle beams can provide focused intensities of 1023 W/cm2. A laser with such an intensity will provide GBars of pressure on target and wiggle a free electron with 100's of MeV energy. This new field is rich in unexplored physics as it combines ultra-high fields, ultra-short beams, ultra-fast phenomena, wave-particle interactions, nonlinear optics, and relativistic intensities and dynamics. It is also central to applied plasma physics subjects such as plasma-based acceleration of electrons, positrons or ions, plasma based radiation sources, and the fast ignitor fusion concept. Furthermore, much of the physics is highly nonlinear and so is difficult to study analytically and challenging to probe experimentally. Therefore, an indispensable tool for understanding the underlying physics and to guide the experiments is computer simulation using particle-in-cell techniques. In this talk I will describe some of the exciting physics, some illustrative results from massively parallel simulations, and recent important experimental results which were modeled in their full-scale using particle simulations.
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