Affiliation: | (1) Troitsk Institute of Innovative and Thermonuclear Research (TRINITI), Troitsk 142092, Moscow Province, Russia (E-mail: apn@triniti.ru), RU;(2) Laser Centre Vrije Universiteit, Department of Physics and Astronomy, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, NL;(3) University of Twente, Faculty of Applied Physics, Quantum Electronics Group, P.O. Box 217, 7500 AE Enschede, The Netherlands, NL |