Time-Resolved Study of Nonlocal Electron Heat Transport in High Temperature Plasmas

T. Ditmire; E. T. Gumbrell; R. A. Smith; A. Djaoui; M. H. R. Hutchinson

doi:10.1103/PhysRevLett.80.720

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Time-Resolved Study of Nonlocal Electron Heat Transport in High Temperature Plasmas

T. Ditmire^1,*, E. T. Gumbrell¹, R. A. Smith¹, A. Djaoui², and M. H. R. Hutchinson^1,2

¹Imperial College of Science, Technology and Medicine, Blackett Laboratory, London, SW7 2BZ, United Kingdom
²Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom

^*Current address: Lawrence Livermore National Laboratory, L-440, Livermore, CA 94550.

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Phys. Rev. Lett. 80, 720 – Published 26 January, 1998

DOI: https://doi.org/10.1103/PhysRevLett.80.720

Abstract

Exploiting the high absorption efficiency of intense, ultrashort laser pulses in gases of atomic clusters we have created plasma filaments with temperatures of $> 1 keV$ and electron densities in excess of $10^{20} {cm}^{- 3}$ . Using picosecond laser pulses, we have interferometrically measured the temporal and spatial evolution of the electron density in these plasmas on a fast $(< 50 ps)$ time scale. Our measurements indicate that nonlocal heat transport by hot electrons drives a fast ionization wave, and the data agree well with a nonlocal heat transport model.

References (18)

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A. Bendib, J. F. Luciani, and J. P. Matte, Phys. Fluids 31, 711 (1988).
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T. Ditmire, E. T. Gumbrell, R. A. Smith, L. Mountford, and M. H. R. Hutchinson, Phys. Rev. Lett. 77, 498 (1996).
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T. Ditmire, T. Donnelly, R. W. Falcone, and M. D. Perry, Phys. Rev. Lett. 75, 3122 (1995).
T. Ditmire, R. A. Smith, J. W. G. Tisch, and M. H. R. Hutchinson, Phys. Rev. Lett. 78, 3121 (1997).
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[c1] J. F. Luciani, P. Mora, and J. Virmont, Phys. Rev. Lett. 51, 1664 (1983).

[c2] P. A. Holstein, J. Delettrez, S. Skupsky, and J. P. Matte, J. Appl. Phys. 60, 2296 (1986).

[c3] A. Bendib, J. F. Luciani, and J. P. Matte, Phys. Fluids 31, 711 (1988).

[c4] P. Mora and J. F. Luciani, Laser Part. Beams 12, 387 (1994).

[c5] P. Alaterre et al., Phys. Rev. A 32, 324 (1985).

[c6] T. J. Goldsack et al., Phys. Fluids 25, 1634 (1982).

[c7] B. T. Vu, A. Szöke, and O. L. Landen, Phys. Rev. Lett. 72, 3823 (1994).

[c8] T. Ditmire, E. T. Gumbrell, R. A. Smith, L. Mountford, and M. H. R. Hutchinson, Phys. Rev. Lett. 77, 498 (1996).

[c9] A. McPherson et al., Nature (London) 370, 631 (1994).

[c10] T. Ditmire, T. Donnelly, R. W. Falcone, and M. D. Perry, Phys. Rev. Lett. 75, 3122 (1995).

[c11] T. Ditmire, R. A. Smith, J. W. G. Tisch, and M. H. R. Hutchinson, Phys. Rev. Lett. 78, 3121 (1997).

[c12] M. Dunne et al., Phys. Rev. Lett. 72, 1024 (1994).

[c13] L. Spitzer and R. Härm, Phys. Rev. 89, 977 (1953).

[c14] W. L. Kruer, The Physics of Laser Plasma Interactions (Addison-Wesley, Redwood City,1988).

[c15] Y. L. Shao et al., Phys. Rev. Lett. 77, 3343 (1996).

[c16] T. Ditmire et al., Nature (London) 386, 54 (1997).

[c17] A. Djaoui, Rutherford Appleton Laboratory Internal Report No. RAL-TR-96-099, 1996.

[c18] A. Djaoui and A. A. Offenberger, Phys. Rev. E 50, 4961 (1994).

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Time-Resolved Study of Nonlocal Electron Heat Transport in High Temperature Plasmas

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