1. Faculty of Computer Science, Electronics and Telecommunications, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland
2. Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
3. Helmholtz Institute Mainz, Johannes Gutenberg University, 55099 Mainz, Germany
4. Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA
5. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA