Hostname: page-component-848d4c4894-tn8tq Total loading time: 0 Render date: 2024-07-02T19:02:53.587Z Has data issue: false hasContentIssue false
  • English
  • Français

Optical ionization and heating of gases by intense picosecond KrF laser radiation

Published online by Cambridge University Press:  09 March 2009

A.A. Offenberger ,
W. Blyth ,
S.G. Preston ,
J.S. Wark ,
M.H. Key ,
A.E. Dangor ,
A. Modena ,
Z. Najmudin ,
A. Djaoui  and
M.H. Key
A.A. Offenberger
Affiliation:
Department of Electrical Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G7 Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
W. Blyth
Affiliation:
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
S.G. Preston
Affiliation:
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
J.S. Wark
Affiliation:
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
M.H. Key
Affiliation:
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
A.E. Dangor
Affiliation:
Department of Physics, Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BZ, United Kingdom
A. Modena
Affiliation:
Department of Physics, Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BZ, United Kingdom
Z. Najmudin
Affiliation:
Department of Physics, Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BZ, United Kingdom
A. Djaoui
Affiliation:
Rutherford Appleton Laboratory, Chilton Didcot, Oxon OX11 OQX, United Kingdom
M.H. Key
Affiliation:
Rutherford Appleton Laboratory, Chilton Didcot, Oxon OX11 OQX, United Kingdom
Get access Rights & Permissions [Opens in a new window]

Abstract

We report on multiphoton ionization experiments using picosecond (ps) and sub-ps UV-laser radiation at focused intensities up to 1018 W/cm2. The experiments are concerned with determining the electron temperature of optically ionized gases produced by intense KrF lasers. Thomson scattering, stimulated Raman scattering (SRS), and X-ray emission measurements have been made and compared with modeling calculations of heating. A particular objective is to identify the respective roles of above-threshold ionization, nonlinear inverse bremsstrahlung absorption, and SRS in determining the temperature of the electrons. Results for 350-fs pulses are compared with previous measurements for 12-ps pulses (for which strikingly different behavior is observed). The importance of using subps, short-wavelength lasers to minimize electron temperature is confirmed.

Type
Research Article
Information
Laser and Particle Beams , Volume 13 , Issue 1 , March 1995 , pp. 19 - 31
Copyright
Copyright © Cambridge University Press 1995

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

Amendt, P. et al. 1991 Phys. Rev. Lett. 66, 2589.CrossRefGoogle Scholar
Burnett, N.H. & Corkum, P.B. 1989 J. Opt. Soc. Am. B6, 1195.Google Scholar
Burnett, N.H. & Enright, G.D. 1990 IEEE J. Quant. Elect. 26, 1797.CrossRefGoogle Scholar
Eder, D.C. et al. 1994 Phys. Plasmas 1, 1744.CrossRefGoogle Scholar
Forslund, D.W. et al. 1975 Phys. Fluids 18, 1002.Google Scholar
Jones, R.D. & Lee, K. 1982 Phys. Fluids 25, 2307.Google Scholar
Leemans, W.P. et al. 1992 Phys. Rev. A46, 1091.CrossRefGoogle Scholar
Li, Y. & Fedosejevs, R. 1994 Meas. Sci. Tech. 5, 1197.CrossRefGoogle Scholar
Mohideen, U. et al. 1993 Phys. Rev. Lett. 71, 509.CrossRefGoogle Scholar
Offenberger, A.A. et al. 1993 Phys. Rev. Lett. 71, 3983.Google Scholar
Penetrante, B.M.& Bardsley, J.N. 1991 Phys. Rev. A43, 3100.Google Scholar
Ross, I.N. et al. 1993 In SPIE Proc. 182, 10.Google Scholar
Shaw, M.J. et al. 1993 Opt. Lett. 18, 1320.CrossRefGoogle Scholar
Sullivan, A. et al. 1993 In SPIE Proc. Ultrashort-Wavelength Lasers II, San Diego, CA (SPIE,Bellingham, WA), Vol. 2012.Google Scholar