At the same time theory and simulation have naturally

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Unformatted text preview: aration of this review, as new significant results continuously appeared in the literature. Andrea Macchi, Marco Borghesi, and Matteo Passoni: Ion acceleration by superintense laser-plasma . . . As discussed in the Introduction, future developments and achievements are naturally linked to foreseen developments in laser technology, providing for the first time extreme laser intensities close to or even beyond the limit at which the ions become relativistic. Emerging laser projects will enable one to verify the scaling of ion acceleration physics in the ultrahigh intensity regimes and its suitability for proposed applications, as well as to test theoretical ideas and provide to fundamental physics an example of ‘‘relativity in action’’ in a macroscopic, many-body system. The expected progress is not exclusively related to further developments of the solid state laser technology which has been so far the preferred route to producing high-intensity laser pulses, as, for example, recent experiments have attracted novel interest also in old technology such as CO2 laser systems. Smart and advanced target engineering, e.g., development of multilayer, low-density, microstructured, and nanostructured targets, will also play an important role in establishing future directions of ion acceleration. The successful developments in this first period lead to a series of open questions, which will inform research in this field over the coming years. Will it be possible to reach and break the GeV/nucleon threshold? Will researchers achieve an active and satisfactory experimental control on the physics of laser ion acceleration by working on the detailed properties of laser pulses and of target material and structure? Is there hope to pursue front-edge nuclear and particle physics research in small-scale laboratories thanks to the use of laser-driven ion beams? Will the research on ion acceleration result in practical, technological applications of direct societal benefit? We leave to the future experimental and theoretical research the answer to these and many other questions, some of which we probably do not even imagine today. ACKNOWLEDGMENTS We acknowledge support of EPSRC, Grant No. EP/ E035728/1 (LIBRA consortium), the Ministry of Education of the Czech Republic (Projects ECOP No. CZ.1.07/2.3.00/ 20.0279 and ELI- Beamlines No. CZ.1.05/1.1.00/02.0061), and from the Italian Ministry of University and Research via the FIRB project ‘‘Superintense Laser-Driven Ion Sources.’’ REFERENCES Adusumilli, K., D. Goyal, and V. K. Tripathi, 2012, Phys. Plasmas 19, 013102. Akli, K. U., et al., 2008, Phys. Rev. Lett. 100, 165002. Albright, B. J., L. Yin, K. J. Bowers, B. M. Hegelich, K. A. Flippo, ´ T. J. T. Kwan, and J. C. Fernandez, 2007, Phys. Plasmas 14, 094502. Albright, B. J., et al., 2010, J. Phys. Conf. Ser. 244, 042022. Albright, B. J., L. Yin, B. M. Hegelich, K. J. Bowers, T. J. T. Kwan, ´ and J. C. Fernandez, 2006, Phys. Rev. Lett. 97, 115002. A...
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This document was uploaded on 09/28/2013.

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