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JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
卷 25, 期 7, 页码 B137-B146出版社
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.25.00B137
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We report the development of corrugated slow-wave plasma guiding structures with application to quasiphase-matched direct laser acceleration of charged particles. These structures support guided propagation at intensities up to 2 X 10(17) W/cm(2), limited at present by our current laser energy and side leakage. Hydrogen, nitrogen, and argon plasma waveguides up to 1.5 cm in length with a corrugation period as short as 35 mu m are generated in extended cryogenic cluster jet flows, with corrugation depth approaching 100%. These structures remove the limitations of diffraction, phase matching, and material damage thresholds and promise to allow high-field acceleration of electrons over many centimeters using relatively small femtosecond lasers. We present simulations that show that a laser pulse power of 1.9 TW should allow an acceleration gradient larger than 80 MV/cm. A modest power of only 30 GW would still allow acceleration gradients in excess of 10 MV/cm. (C) 2008 Optical Society of America.
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