Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-06T04:59:47.140Z Has data issue: false hasContentIssue false

Pulsation of laser–plasma interaction explained by density ripple buildup and relaxation for understanding smoothing by random-phase plate, ISI, and broadband

Published online by Cambridge University Press:  09 March 2009

Gu Min
Affiliation:
Department of Theoretical Physics, University of New South Wales, Kensington 2033, Australia
H. Hora
Affiliation:
Department of Theoretical Physics, University of New South Wales, Kensington 2033, Australia

Abstract

In recent years experimental results about the pulsation of reflectivity or 3ω/2 harmonics from laser-irradiated plasma with a period of 10–20 ps initiated a reconsideration of a broad field of phenomena of laser-plasma interaction. We present here numerical results from a very general hydrodynamic computation showing that the pulsation is due to a standing-wave-produced density ripple in the widespread plasma corona causing these after 2 ps at Laue-Bragg reflection at very low density, followed by a hydrodynamic relaxation of the ripple. This cycle has a turnaround time of about 6–10 ps and immediately explains the observation of pulsation. The suppression of pulsation and the achievement of smooth direct drive is then understood by a washing-out process of the ripples when using the random-phase plate (RPP) or broadband irradiation, or by just preventing the buildup of the ripple at the induced spatial incoherence (ISI), where coherence of the laser field is 1 or 2 ps only.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Büchl, K. et al. 1972 In Laser Interaction and Related Plasma Phenomena, edited by Schwarz, H. & Hora, H. (Plenum, New York), Vol. 2, p. 503.CrossRefGoogle Scholar
Ceglio, N. M. 1988 In Laser Interaction and Related Plasma Phenomena, edited by Hora, H. & Miley, G. H. (Plenum, New York), Vol. 8, p. 39.Google Scholar
Chen, F. F. 1974 In Laser Interaction and Related Plasma Phenomena, edited by Schwarz, H. & Hora, H. (Plenum, New York), Vol. 3A, p. 291.CrossRefGoogle Scholar
Cicchitelli, L. et al. 1984 Laser Part. Beams 2, 467.CrossRefGoogle Scholar
Cicchitelli, L. et al. 1989 In Advanced Accelerator Concepts, AIP Proceedings No. 192, edited by Joshi, C. (AIP, New York), p. 17.Google Scholar
Clayton, C. E., Joshi, C. & Chen, F. F. 1983 Phys. Rev. Lett. 51, 1656.CrossRefGoogle Scholar
Dragila, R., Maddever, R. A. M. & Luther-Davies, B. 1987 Phys. Rev. A 36, 5292.CrossRefGoogle Scholar
Drake, R. P. 1988 Laser Part. Beams 6, 235.CrossRefGoogle Scholar
Eliezer, S. & Hora, H. 1989 Phys. Rep. 172, 339.Google Scholar
Engelhardt, A. G. et al. 1970 Phys. Fluids 13, 212.Google Scholar
Evans, R. 1988 Nature 333, 296.CrossRefGoogle Scholar
Giulietti, A. et al. 1988 In Proceedings of the 19th ECLIM, Madrid, edited by Velarde, G., Minguez, E. & Perlado, Y. M. (World Scientific Books, Singapore), p. 208.Google Scholar
Goldsworthy, M. P., Hora, H. & Stening, R. J. 1989 In Plasma Physics and Controlled Nuclear Fusion Research 1988, Nice (IAEA, Vienna), Vol. II, p. 181.Google Scholar
Gu, Min et al. 1988 Opt. Commun. 66, 35.Google Scholar
Gupta, P. D. & Kumbhare, S. R. 1989 Phys. Rev. A 40, 3265.Google Scholar
Hora, H. 1969a Phys. Fluids 12, 182.CrossRefGoogle Scholar
Hora, H. 1969b Z. Phys. 226, 156.Google Scholar
Hora, H., Kinsinger, R. & Lubin, M. 1974 Verh. Dtsch Phys. Ges. (VI) 9, 496.Google Scholar
Hora, H. 1975 Laser Plasmas and Nuclear Energy (Plenum, New York).CrossRefGoogle Scholar
Hora, H. 1981 Physics of Laser Driven Plasmas (Wiley, New York).Google Scholar
Hora, H. 1982 Opt. Commun. 41, 268.Google Scholar
Hora, H., Lalousis, P. & Eliezer, S. 1984 Phys. Rev. Lett. 53, 1650.Google Scholar
Hora, H. et al. 1989 IEEE Trans. Plasma Sci. 17, 284.CrossRefGoogle Scholar
Hora, H. et al. 1990 In Laser Interaction and Related Plasma Phenomena, edited by Hora, H. & Miley, G. H. (Plenum, New York), Vol. 9, p. 95.Google Scholar
Isenor, N. R. 1964 Appl. Phys. Lett. 4, 152.CrossRefGoogle Scholar
Jaeole, P. (editor) 1986 X-Ray Lasers J. Phys. Colloq. 47, C6.Google Scholar
Jaeckel, S., Perry, B. & Lubin, M. 1976 Phys. Rev. Lett. 37, 95.CrossRefGoogle Scholar
Kato, Y. et al. 1984 Phys. Rev. Lett. 53, 1057.Google Scholar
Labaune, C. et al. 1985 Phys. Rev. A 32, 577.Google Scholar
Lalousis, P. & Hora, H. 1983 Laser Part. Beams 1, 283.Google Scholar
Lehmberg, R. H. et al. Lecture ECLIM '90 at Schliersee.Google Scholar
Lin, Zunqi et al. 1986 Laser Part. Beams 4, 223.Google Scholar
Linlor, W. I. 1963 Appl. Phys. Lett. 3, 210.Google Scholar
Luther-Davies, P., Perry, A. & Nugent, K. A. 1987 Phys. Rev. A 36, 5309.Google Scholar
MacGowan, B. J. et al. Lecture ECLIM '90 at Schliersee.Google Scholar
Maddever, R. A. M.1988. Ph.D. thesis, Australian National University, 1988.Google Scholar
Maddever, R. A. M., Luther-Davies, B. & Dragila, R. 1990 Phys. Rev. A 41, 2154.CrossRefGoogle Scholar
Meyers, R. A. (editor) 1987 Encyclopedia of Physical Sciences and Engineering (Academic, New York), Vol. 7, pp. 99 and p. 129 ff.Google Scholar
Nuckolls, J. H. 1982 Phys. Today 35 (No. 9), 24.Google Scholar
Obenschain, S. P. et al. 1986 Phys. Rev. Lett. 56, 2807.Google Scholar
Obenschain, S. P. et al. 1989 Phys. Rev. Lett. 62, 768.CrossRefGoogle Scholar
Oraevski, V. N. & Sagdeev, R. Z. 1963 Sov. Phys. Tech. Phys. 7, 955.Google Scholar
Richardson, M. C. & Alcock, A. J. 1971 Appl. Phys. Lett. 18, 357.CrossRefGoogle Scholar
Scheid, W. & Hora, H. 1989 Laser Part. Beams 7, 315.CrossRefGoogle Scholar
Shapiro, R. 1970 Rev. Geophys. Space Phys. 8, 359..Google Scholar
Shirsat, T. S., Parab, H. D. & Pant, H. C. 1989 Laser Part. Beams 7, 795.Google Scholar
Spitzer, L. Jr. 1962 Physics of Fully Ionized Gas (Wiley, New York)..Google Scholar
Szichman, H. 1988 Phys. Fluids 31, 1702.CrossRefGoogle Scholar
Tan, Weihan et al. 1986 Laser Part. Beams 4, 231.Google Scholar