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P: Plasmaphysik
P 9: Dense Plasmas and Plasma Diagnostic (Poster Session)
P 9.1: Poster
Tuesday, April 3, 2001, 12:30–15:00, AT2
Measurements of electrical conductivity changes induced in solid targets by high intensity heavy ion beams — •S. Udrea1, C. Constantin1, E. Dewald2, U.N. Funk1, J. Jacoby2, A. Kozyreva1, U. Neuner2, A. Shutov3, N.A. Tahir2, D. Varentsov1, and D.H.H. Hoffmann2 — 1Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt — 2Gesellschaft für Schwerionenforschung, Darmstadt — 3IPCP RAS, Chernogolovka, Russia
Strong heating of solid targets due to irradiation with high intensity heavy ions beams drives these into the state of a dense, non-ideal plasma. Experiments were performend to determine the electrical conductivity of such plasmas.
Pb, Cu and Ag were used as target materials. The intensity of the ion beams was 109-1011 particles in 0.7-1.0µs bunches; the ions had energies of 200 and 300 MeV/u. Pb targets were irradiated with Au and O beams, Cu and Ag targets were irradiated with Ar beams.
The measured signals show the evolution of the targets’ electrical resistance in time. To determine the electrical conductivity informations about the geometry, temperature and density of the target have to be obtained. The expansion of the target was monitored experimentally and the results where compared with hydro-code simulations. Temperature, density, pressure and current distributions were also simulated.
This work is funded by the BMBF.