Berlin 2001 – wissenschaftliches Programm
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P: Plasmaphysik
P 9: Dense Plasmas and Plasma Diagnostic (Poster Session)
P 9.8: Poster
Dienstag, 3. April 2001, 12:30–15:00, AT2
Simultaneous target heating and diagnostics by energetic heavy ion beams — •Dmitri Varentsov1, Peter Spiller2, Ulrich Funk1, Anna Kozyreva1, Naeem Tahir3, Joachim Jacoby2, Ulrich Neuner2, and Dieter H.H. Hoffmann1,2 — 1Technische Universität Darmstadt — 2Gesellschaft für Schwerionenforschung, Darmstadt — 3Universität Frankfurt
At the Gesellschaft für Schwerionenforschung (GSI) Darmstadt, intense beams of energetic heavy ions have been used to generate hot dense plasmas by impact on solid targets. Recently, we have measured time evolution of the energy loss of intense beams (109–1011 particles/pulse, ion energy 200–350 MeV/u) of 238U, 86Kr, 40Ar and 18O projectiles in cryogenic rare-gas crystals. For this purpose a new time-resolving energy-loss spectrometer has been set up, in which the bulk of fast scintillator is used as a detection medium. We observed continuous reduction in the energy loss due to hydrodynamic motion of the ion beam heated target matter. These are the first measurements of this kind.
Two-dimensional hydrodynamic simulations were also carried out using the beam and target parameters of the experiment. Good agreement has been found between the experimental results and the simulations.
This work was supported by the BMBF.