A digital on-line implementation of a Pulse-Shape analysis algorithm for neutron-gamma discrimination in the NEDA detector

20th IEEE Real Time Conference, 5–10 Haz 2016, Padova, Italy -- F.J. Egea is with INFN Sezione di Padova, Padova, Italy. E-mail: javiegea@pd.infn.it. -- V. González and E. Sanchis are with Departament d’Enginyeria Electrònica. Universitat de València. Burjassot (Spain). -- C. Houarner, A. Boujrad, M. Tripon and G. de France are with Grand Accélératéur National d’Ions Lourds (GANIL), Caen, France. -- A. Gadea and T. Hüyük are with Institut de Física Corpuscular (IFIC), Paterna, Spain. -- J.J. Valiente-Dobón and G. Jaworski are with LNL (Laboratori Nazionali di Legnaro), Legnaro, Italy. -- J. Nyberg is with Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden. -- M. Moszyński is with National Centre for Nuclear Research, A. Soltana 7, PL 05-400 Otwock-Swierk, Poland. -- M.N. Enduran is with Faculty of Engineering and Natural Sciences, Istanbul Sabahattin Zaim University Istanbul, Turkey. -- S. Ertürk is with Nigde Universitesi, Fen-Edebiyat Falkultesi, Fizik Bölümü, Nigde, Turkey. -- M. Jastrząb is with the Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland. -- I. Lazarus is with STFC Daresbury Laboratory, Warrington, United Kingdom. -- P-A. Söderström is with RIKEN Nishina Center, Wako-shi, Japan. -- V. Modamio is with Universitet I Oslo, Oslo, Norway. -- X. L. Luo is with Department of Instrument Science and Technology, National University of Defense Technology, Changsha, China. -- M.Palacz are with the Heavy Ion Laboratory, University of Warsaw, Warszawa, Poland. -- R. Wadsworth is with Department of Physics, University of York, York, United Kingdom. The detection of rare events close to the proton dripline involve the utilization of high-efficient neutron detectors with excellent neutron-gamma discrimination (NGD) performance. Even though in the literature, several off-line algorithms focus on the maximization of the NGD accuracy, our aim is to look for an on-line efficient implementation capable to discard a majority of the gamma-rays, therefore allowing the system to work to counting rates up to 50 kHz, optimizing hence the overall electronics infrastructure in terms of data throughput. In this paper we analyze two of the most widespread techniques for NGD based on PSA, i.e. the charge-comparison method (CC) and the zero crossover (ZCO). Then, based on the NGD performance and FPGA resource utilization, we select one to be implemented in an FPGA. Finally we present the preliminary results obtained up to now.