Digitalized two parametric system for gamma/neutron
spectrometry

D 2014

Digitalized two parametric system for gamma/neutron spectrometry

VEŠKRNA, Martin, Zdeněk MATĚJ, Filip MRAVEC, Václav PŘENOSIL, František CVACHOVEC et. al.

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

Language

English

Type of outcome

Stať ve sborníku

Field of Study

20206 Computer hardware and architecture

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

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

Abstract

ORIG CZ

V originále

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.

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 project

Name: Digitální spektrometrický systém jaderného záření

Files attached

RPSD2014_-_Digitalized_two_parametric_system_for_gammaneutron_spectrometry.pdf

Find similar documents

Citovat

VEŠKRNA, Martin, Zdeněk MATĚJ, Filip MRAVEC, Václav PŘENOSIL, František CVACHOVEC and Michal KOŠŤÁL. Digitalized two parametric system for gamma/neutron spectrometry. Online. 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.

@inproceedings{1210637,
   author = {Veškrna, Martin and Matěj, Zdeněk and Mravec, Filip and Přenosil, Václav and Cvachovec, František and Košťál, Michal},
   address = {Knoxville, USA},
   booktitle = {18th Topical Meeting of the Radiation Protection and Shielding Division (RPSD 2014)},
   keywords = {gamma/neutron spectrometry; discrimination; spectrometry; PSD; two-parameter spectrometer; neutron spectrometry},
   howpublished = {elektronická verze "online"},
   language = {eng},
   location = {Knoxville, USA},
   isbn = {978-0-89448-714-9},
   pages = {1-4},
   publisher = {American Nuclear Society},
   title = {Digitalized two parametric system for gamma/neutron spectrometry},
   year = {2014}
}

TY  - JOUR
ID  - 1210637
AU  - Veškrna, Martin - Matěj, Zdeněk - Mravec, Filip - Přenosil, Václav - Cvachovec, František - Košťál, Michal
PY  - 2014
TI  - Digitalized two parametric system for gamma/neutron spectrometry
PB  - American Nuclear Society
CY  - Knoxville, USA
SN  - 9780894487149
KW  - gamma/neutron spectrometry
KW  - discrimination
KW  - spectrometry
KW  - PSD
KW  - two-parameter spectrometer
KW  - neutron spectrometry
N2  - 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.
ER  -

VEŠKRNA, Martin, Zdeněk MATĚJ, Filip MRAVEC, Václav PŘENOSIL, František CVACHOVEC and Michal KOŠŤÁL. Digitalized two parametric system for gamma/neutron spectrometry. Online. In \textit{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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