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Diagnosis of laser produced plasmas using fusion reaction products

Published online by Cambridge University Press:  09 March 2009

P. M. Evans
Affiliation:
H H Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K.
A. P. Fews
Affiliation:
H H Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K.
W. T. Toner
Affiliation:
Laser Division, Rutherford Appleton Lab, Chilton, Didcot, Oxon. U.K.

Abstract

Experiments have been performed at the Central Laser Facility, Rutherford Appleton Lab., UK. using novel techniques in which laser produced plasmas have been diagnosed by measurements of the charged thermonuclear reaction products. Two types of experiment are being reported here. Firstly, thermonuclear alpha particles from an exploding pusher target have been used to determine the growth of the Rayleigh–Taylor instability in a separate laser driven planar foil. The resulting alpha particle range loss distributions provide a direct measurement of the foil thickness distribution and hence the instability. The R–T instability has been observed in a number of foils with range losses varying between almost zero to over lOμm. Secondly, a thermonuclear particle backlighting technique has been used in the measurement of the stopping power of hot plasma for different materials. The ratio of plasma stopping power to that of the cold material is measured and compared to a value obtained from theoretical modelling. The solid state nuclear track detector CR–39 has been used as a diagnostic for these experiments. A sophisticated image analysis system has been developed to enhance and improve data recovery.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1988

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References

Cole, A. J. et al. 1982 Nature, 299, 329331.CrossRefGoogle Scholar
Fews, A. P. & Henshaw, D. L. 1982, Nucl. Instr. Meth., 197, 517529.CrossRefGoogle Scholar
Fews, A. P. 1984 Annual Report to the Laser Facility Committee, Rutherford Appleton Lab, UK, Report No. RAL-84–049, A6.6–A6.31.Google Scholar
Fews, A. P. 1987a “A generalized method for analyzing alpha particle and proton etched tracks in CR–39 plastic,” in preparation.CrossRefGoogle Scholar
Fews, A. P. 1987b “Fully automated image analysis of alpha particle and proton etched tracks in CR–39 plastic,” in preparation.Google Scholar
Rose, S. J. 1987 Rutherford Appleton Lab, UK, private communication.Google Scholar