Digitální spektrometrický systém jaderného zářeníSPEKTRUM Project

The SPEKTRUM project deals with design and implementation of a functional sample of a versatile digital spectrometric system. When operating in two-parameter mode, the system may work as a spectrometer for neutrons and gamma rays with organic scintillator stilbene or hydrogen-filled proportional counter. When the type of the detected particle needs not be determined, the system can be used with virtually any spectrometric detector in one-parameter mode.

Main Features of the SPEKTRUM System

  • High accuracy and speed of data processing.
  • Possibility to evaluate the measured data both on-line and off-line.
  • One- and two-parameter mode of operation.
  • Universal use with different spectrometric detectors.

The SPEKTRUM system evaluates the data immediately after they have been recorded. That enables faster calibration and setup of the measuring set. In this way we can achieve better results when measuring the spectrum of a mixed filed consisting of fast neutrons and gamma rays. The applications of the system in development include nuclear power engineering, research of fusion technologies or radiation protection.

Gamma and Neutrons Rays


Selected Publications and Results

  • COMBOI-ADC - a prototype of high-speed 4-channel A/D card for digitalization of analog output of spectrometric detectors.
  • Neutron and Gamma Spectrometry in the Research Reactor LR-0 (Animma 2009, ISBN 978-1-4244-5207-1).
  • Digital Processing of Output Signals from Radiation Sensors (ICMT'11, ISBN 978-80-7231-788-2).

The Research Team

The SPEKTRUM project started in 2011 with the support of the Technology Agency of the Czech Republic. The research team consists of groups from the Masaryk University, University of Defence, and VF, a.s. Lecturers and PhD students from MU and UD and members of Institute of Computer Science at MU participate in the project.


The SPEKTRUM system is based on combination of sufficiently fast and precise measuring card and data processing algorithms. For the two-parameter system for detection of neutrons and gamma rays with organic scintillators there is a need for discrimination of pulses coming from the detector. The discrimination is based on the time course of the pulse (or its part) that contains information about the type and energy of the detected particle.

The output signal from the detector is digitized by the COMBOI-ADC card. The card consists of A/D converters and is controlled by Virtex-6 FPGA. The solution is able to pre-process data directly on the measuring card.