VEŠKRNA, Martin, Zdeněk MATĚJ, Filip MRAVEC, Václav PŘENOSIL, František CVACHOVEC and Michal KOŠŤÁL. Digitalized two parametric system for gamma/neutron spectrometry. In 18th Topical Meeting of the Radiation Protection and Shielding Division (RPSD 2014). Knoxville, USA: American Nuclear Society, 2014. p. 1-4. ISBN 978-0-89448-714-9.
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Basic information
Original name Digitalized two parametric system for gamma/neutron spectrometry
Name in Czech Digitalizovaný dvouparametrický systém pro gamma/neutron spektrometrii
Authors VEŠKRNA, Martin (203 Czech Republic, guarantor, belonging to the institution), Zdeněk MATĚJ (203 Czech Republic), Filip MRAVEC (203 Czech Republic), Václav PŘENOSIL (203 Czech Republic), František CVACHOVEC (203 Czech Republic) and Michal KOŠŤÁL (203 Czech Republic).
Edition Knoxville, USA, 18th Topical Meeting of the Radiation Protection and Shielding Division (RPSD 2014), p. 1-4, 4 pp. 2014.
Publisher American Nuclear Society
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 20206 Computer hardware and architecture
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
Publication form electronic version available online
RIV identification code RIV/00216224:14330/14:00073299
Organization unit Faculty of Informatics
ISBN 978-0-89448-714-9
Keywords (in Czech) gama/neutronová spektrometrie, diskriminace; PSD; spektrometrie; dvouparametrický spektrometr; neutronová spektrometrie
Keywords in English gamma/neutron spectrometry; discrimination; spectrometry; PSD; two-parameter spectrometer; neutron spectrometry
Tags International impact, Reviewed
Changed by Changed by: prof. Ing. Václav Přenosil, CSc., učo 169249. Changed: 16. 4. 2015 09:31.
Abstract
Many types of detectors like stilbene, NE-213 etc. in conjunction with photomultiplier loaded with low working resistance produce pulses of approximately 100 ns length and contain information about deposited particle in the trailing edge. Using fast analog to digital converters (ADC) and field-programmable gate array (FPGA) it is possible to create a spectrometric system working in mixed gamma and neutron fields which is not loaded dead time. The count rate of processed pulses can reach more than one million per second. Such a high count rate of processed pulses can be achieved due to the pulse processing is implemented in FPGA. The output of this pulse processing is amplitude which describes the energy of deposited particle and discrimination parameter whereby it is possible to discriminate photons and neutrons. To increase the dynamic range of energy of detectable particle the signal from photomultiplier is separated into two branches with different amplification. Each branch is digitalized by separate ADC. Components from which the system is composed are so light that the spectrometer can be easily transported. Its weight is less than 3 kilograms. Spectrometer was tested in the research reactor LR-0 in Rez near Prague (Czech Republic). The measured data was processed using deconvolution into a neutron flux density and compared with nowadays used analog spectrometer and simulation result. Measured neutron spectrum of Cf-252 is included.
Abstract (in Czech)
Článek popisuje spektrometr pro měření ve směsných polích gama/neutrony. Analogový signál z detektoru je vzorkován AD převodníky pracujícími na frekvenci 1 GHz. Předzpracování signálu probíhá v FPGA a tím je zajištěna vysoká propustnost systému bez mrtvé doby. Spektrometr byl testován v Centru výzkumu Řež na reaktoru LR-0.
Links
TA01011383, research and development projectName: Digitální spektrometrický systém jaderného záření
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  • a concrete person prof. RNDr. František Cvachovec, CSc., učo 132932
  • a concrete person prof. Ing. Václav Přenosil, CSc., učo 169249
  • a concrete person RNDr. Filip Mravec, Ph.D., učo 208395
  • a concrete person Ing. Michal Košťál, Ph.D., učo 234669
  • a concrete person RNDr. Martin Veškrna, učo 256569
  • a concrete person RNDr. Pavel Šmerk, Ph.D., učo 3880
  • a concrete person RNDr. Zdeněk Matěj, Ph.D., učo 72963
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