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P: Plasmaphysik

P 9: Plasma Physics

P 9.4: Vortrag

Dienstag, 18. März 2003, 16:30–16:50, FO4

Collisionless Shock Formation in Magnetic Fields using Exploding Foils — •c. Courtois¹, A. D Ash¹, D. Chambers¹, R.O. Dendy², R.A.D. Grundy¹, R. Heathcote³, P. Helander², B. Lings⁴, K.G. McClements², M.M. Notley³, K. Rosolankova⁴, M. Tolley³, and N.C. Woolsey¹ — ¹Departement of Physics, University of York, Heslington, York, YO10 5DD, United Kingdom — ²UKAEA, Culham Science Centre, Abingdon, OX14 3DB, United Kingdom — ³CLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom — ⁴Department of Physics, University of Oxford, Parks Road, Oxford, OX4 1PP, United Kingdom

Here we present results of an experiment designed to address key aspects of magnetized collisionless shocks by colliding two laser-produced plasmas.

Results show that counter-propagating collisionless plasmas mainly interpenetrate when no magnetic field is present.

In contrast, experimental results obtained in the presence of a 7 T magnetic field suggest the formation of shock-like structures.

This may result from an increase in the effective collisionality as the ion gyro-radius becomes shorter than the system size.

Finally, these results indicate that experimental dimensionless parameters (plasma beta...) can match those of a 100 year old supernova remnant, and that scaled laser plasma experiments of collisionless shocks are relevant to supernova remnant studies.