[1] Physics Laboratory, University of Athens, Greece
[2] NCRC dEMOKRITOS, Greece
[3] University of Crete, Greece
[4] CERN, Switzerland
[5] University of Florence, Italy
[6] University of Kiel, Germany
[7] Institute for Nuclear Research, Russian Academy of Sciences, Russia
[8] Institute of Oceanology, Russian Academy of Sciences, Russia
[9] Experimental Design Bureau of Oceanological Equipment, Russian Academy of Sciences, Russia
[10] Ellinogermaniki Agogi S.A., Head of the Research and Development Dept., D. Plakentias Ave. 25, GR-15344 Chalandri, Greece