Address for correspondence:
Leibniz Institute for Plasma Science and Technology
GD 2010
Felix-Hausdorff-Str. 2
17489 Greifswald
Germany
Tel.: +49 (0) 3834 554 439
Fax: +49 (0) 3834 554 301
E-Mail: gd2010@inp-greifswald.de
