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Phys. Plasmas 16, 056707 (2009); http://dx.doi.org/10.1063/1.3133024 (5 pages)

Temperature profiles derived from transverse optical shadowgraphy in ultraintense laser plasma interactions at 6×1020 W cm−2 a

a Paper KI2 4, Bull. Am. Phys. Soc. 53, 157 (2008).
K. L. Lancaster1, J. Pasley1,2, J. S. Green1, D. Batani3, S. Baton4, R. G. Evans1,5, L. Gizzi6, R. Heathcote1, C. Hernandez Gomez1, M. Koenig4, P. Koester6, A. Morace3, I. Musgrave1, P. A. Norreys1,5, F. Perez4, J. N. Waugh2, and N. C. Woolsey2

1Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
2Department of Physics, University of York, Heslington YO10 5DD, United Kingdom
3Dipartimento di Fisica “G. Occialini,” Universita degli Studi di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy
4Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605, CNRS-CEA Universite Paris VI—Ecole Polytechnique, 91128 Palaiseau, France
5Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, United Kingdom
6ILIL, CNR-IPCF, Via G. Moruzzi, 1, 56124 Pisa, Italy

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(Received 8 December 2008; accepted 21 April 2009; published online 28 May 2009)

A variety of targets with different dimensions and materials was irradiated using the VULCAN PW laser [ C. N. Danson et al., Nucl. Fusion 44, S239 (2004) ]. Using transverse optical shadowgraphy in conjunction with a one-dimensional radiation hydrodynamics code it was possible to determine a longitudinal temperature gradient. It was demonstrated for thick targets with a low Z substrate and a thin higher Z tracer layer at the rear that the boundary between the two materials was Rayleigh–Taylor unstable. By including a simple bubble growth model into the calculations it was possible to correct for the associated behavior with regard to temperature. The resulting temperature gradient was in good agreement with the previously published data using two different methods of determining the temperature.

© 2009 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL METHOD
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

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KEYWORDS and PACS

PACS

  • 52.70.Kz

    Optical (ultraviolet, visible, infrared) measurements

  • 52.40.Mj

    Particle beam interactions in plasmas

  • 52.40.Hf

    Plasma-material interactions; boundary layer effects

  • 52.35.Py

    Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)

ARTICLE DATA

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

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