Software at mobile spectrometer with CZT-Detector

Abstract

The technology is based on a semiconductor CdZnTe-portable (almost the size of a mobile phone) gamma-ray spectrometer
with high resolution, which provides high efficiency of rapid identification of radionuclides and assessment of radiation dose from
low to moderately high levels. The CdZnTe gamma-ray spectrometer is a highly efficient device based on the use of CdZnTe (CZT)
semiconductor detectors operating at room temperature with very low power consumption, a digital multichannel analyzer, and a
microcomputer. CdZnTe-portable spectrometer is a self-contained device and consists of three modules - a detector module, a
multichannel analyzer, and a microcomputer. The detector module contains a high-quality CdZnTe detector, a preamplifier, and a
high voltage power supply for the detector. There are detector modules with different volumes of the CZT detector from 5 mm3
to

1600 mm3
. It is possible to use a multi-detector system. The analyzer module contains an amplifier, a digital signal processor, a low
voltage power supply, and a computer interface. The microcomputer software interacts with the multichannel analyzer, analyzes
gamma spectra, and provides the accumulation of time profiles of the dose of gamma radiation, communication with other
information systems. Spectrometric measurements in real-time make it possible to use "electronic collimation" technologies to build
a map of the radiation field and localize sources of ionizing radiation, with the subsequent certification of identified sources, creation
of an effective radiation monitoring system with the functions of certification of ionizing sources radiation. The corresponding
software allows you to solve the following tasks – building a three-dimensional map of the fields of ionizing radiation of various
degrees of spatial detailing, taking into account the radiation energy, localization, and certification of gamma radiation sources. The
special laboratory kit is based on μSPEC microspectrometers. A LattePanda single board computer is used to control the operation of
spectrometers, collect and analyze data. LattePanda – A Windows 10 Computer with integrated Arduino. This explains the choice of
LattePanda. Windows 10 application allows you to use the WinSPEC software to control the multichannel analyzer operation
supplied with the spectrometer. The built-in Arduino allows you to remote control the movement of the radiation source during
laboratory experiment. Both the traditional problems of calibrating spectrometers (energy calibration and efficiency curves),
including those for various source geometries, processing the measured spectra using standard programs, calculating the activity of
sources, and the problem of creating a spectra processing program and a spectrometer control program are considered. The values of
the minimum detectable activity are given.