J. Phys. IV France 11 (2001) Pr2-547-Pr2-550
Enhanced Balmer-[MATH] emission in interpenetrating plasmasL. Aschke1, Yu.V. Ralchenko2, E.A. Solov'ev3 and H.-J. Kunze4
1 Institute for Experimental Physics V, Ruhr- University, 44780 Bochum, Germany
2 Department of Particle Physics, Weizmann lnstitute of Science, Rehovot 76100, Israel
3 Macedonian Academy of Sciences and Arts, Research Center for Energy and Informatics, P.O. Box 428, 91000 Skopje, Macedonia
4 lnstitute for Experimental Physics V, Ruhr- University, 44780 Bochum, Germany
The interpenetration of laser produced plasmas can be detected by the occurrence of charge exchange reactions. Such reactions only occur if highly charged ions collide with ions of a significantly lower charge in suitable energy levels. This leads to selective population of a specific level of the highly charged ion resulting in an enhancement of particular lines in the region of the interaction. In case of interpenetrating carbon plasmas these reactions lead to enhanced line emission at 18.2 nm (H[MATH] line of C VI). We present spatially and temporally resolved investigations of the interaction region of colliding plasmas ; we show results of calculations of the cross sections for charge exchange obtained with a semi-classical model and compare measured spectra with calculated ones obtained from a collisional radiative model.
© EDP Sciences 2001