Affiliation: | (1) Atomic Physics Laboratory, Physics Department, Banaras Hindu University, 221 005 Varanasi, India;(2) Institute for Plasma Research, Near Indira Bridge, 382 428 Bhat, Gandhinagar, India;(3) Fachbereich Physik, Universitaet Greifswald, Domstrasse 10a, 17487 Greifswald, Germany;(4) Technology Information, Forecasting and Assessment Council (TIFAC), DST, 110 016 New Delhi, India |