Bonn 2000 – wissenschaftliches Programm
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P: Plasmaphysik
P 20: Entladungen (Poster)
P 20.18: Poster
Donnerstag, 6. April 2000, 17:00–19:30, Aula
Ion beam transport in laser-initiated high current discharge channels — •D. Penache1,2, C. Niemann1,2, A. Tauschwitz1,2, R. Presura2, M. Geissel1,2, C. Penache3, R. Knobloch1,2, U. Neuner2 und D.H.H. Hoffmann1,2 — 1Technische Universität Darmstadt — 2Gesellschaft für Schwerionenforschung, Darmstadt — 3J.W.Goethe Universität, Frankfurt/Main
The transport of space charge dominated ion beams is of interest for many application using high power particle beams. The most challenging demands are found in the field of ion beam driven inertial confinement fusion. Motivated by this application, focusing and transport of ion beams in gas discharge plasma which can provide both space charge and current neutralization is under investigation since a number of years. Ion optical properties of such a plasma channel have been studied for the first time using a heavy ion beam at GSI. In the experiments a carbon ion beam with an energy of 13.5MeV/amu from GSI-UNILAC liniar accelerator is used and measurements with heavier ions are planned for the future. The discharge is initiated in low pressure (10-20mbar) ammonia gas by the help of a CO2 laser and the current can be increased up to 40kA. A parallel ion beam of one centimeter diameter is injected into the discharge channel of 50cm length and diagnosed after passing through it with the help of a scintillator coupled with a fast camera. The results are in good agreement with the simulated trajectories for an ion beam transported in a plasma column.
This work is supported by BMBF