Proceedings of the 27th International Symposium Nuclear Electronics and Computing (NEC’2019) Budva, Becici, Montenegro, September 30 – October 4, 2019 THE SOFTWARE AND SOLUTIONS FOR EXPRESS PROCESSING OF THE RAW LIST MODE DATA MEASURED ON THE NEUTRON SPECTROMETERS OF THE IBR-2 REACTOR USING A DELAY LINE POSITION-SENSITIVE DETECTOR AS DESIGNED TO BE INTEGRATED INTO THE EXPERIMENT CONTROL SYSTEM E.I. Litvinenko 1,a , A.A. Bogdzel 1 , V.I. Bodnarchuk 1 , A.V. Churakov 1 , I.V. Gapon 1,2 , V.A. Drozdov 1 , S.A. Kulikov 1 , S.M. Murashkevich 1 , A.V. Nagornyi 1,3 1 Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia 2 Institute for Safety Problems of Nuclear Power Plants, NAS Ukraine, Chornobil, Ukraine 3 Kyiv Taras Shevchenko National University, Kyiv, Ukraine E-mail: a litvin@nf.jinr.ru Recently we have performed a comparative study of the characteristics of the data acquisition systems for the position-sensitive detectors with a delay line operating on the neutron instruments of the IBR-2 reactor. As a result, to have an optimal version of electronics we have chosen two directions of further development: the DeLiDAQ-2 system for high-flux measurements and the CAEN N6730 digitizer- based system for high-precision experiments. The study has also revealed an urgent need to integrate list mode measurements into the experiment control system on some of the neutron spectrometers. So far, the experiment control system SONIX operating on most of the IBR-2 spectrometers has received and displayed the data measured in the histogram mode. The report, besides the results of the comparative study, describes the software that is developed to solve the task of formation of events from raw data, their sorting, selecting by appropriate criteria, and histogramming as well as to be appropriate for integration into the SONIX. The proposed solutions are not limited to any specific types of electronics for PSD. Keywords: time-of-flight, position-sensitive delay line detector, FPGA Elena Litvinenko, Viktor Bodnarchuk, Andrey Bogdzel, Andrey Churakov, Vladimir Drozdov, Igor Gapon, Sergey Kulikov, Svetlana Murashkevich, Anatolii Nagornyi Copyright © 2019 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0). 165