Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement

Fission chambers are widely used in nuclear reactors, either occasionally to probe the neutron flux maps in nuclear power plants or as part of the nuclear instrumentation used in research reactors to characterize neutron flux levels in irradiation locations. Wide dynamic range acquisition systems ar...

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Autores principales:	Bisiach Danilo, Barbot Loïc, De Izarra Grégoire, Destouches Christophe, Cargnelutti Manuel, Zorzut Sebastjan
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	miniature fission chamber neutron flux measurement transimpedance amplifier low current measurement Physics QC1-999
Acceso en línea:	https://doaj.org/article/428d7128f6964c3785f3ea5781a90d60
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id	oai:doaj.org-article:428d7128f6964c3785f3ea5781a90d60
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spelling	oai:doaj.org-article:428d7128f6964c3785f3ea5781a90d602021-12-02T17:12:46ZDevelopment of a Wideband Current Amplifier dedicated to Fission Chamber Measurement2100-014X10.1051/epjconf/202125304015https://doaj.org/article/428d7128f6964c3785f3ea5781a90d602021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_04015.pdfhttps://doaj.org/toc/2100-014XFission chambers are widely used in nuclear reactors, either occasionally to probe the neutron flux maps in nuclear power plants or as part of the nuclear instrumentation used in research reactors to characterize neutron flux levels in irradiation locations. Wide dynamic range acquisition systems are very limited in the nuclear instrumentation market. Thus, since 2012, CEA is developing the MONACO system, which allows measurement in pulse, fluctuation, and current mode running simultaneously on the same channel. The simultaneous use of three measurement modes places high requirements on the amplification stage. Indeed, the current mode exploits a bandwidth between 0 and a few kHz, while the fluctuation mode is based on the frequency range of 100 kHz 1MHz. Finally, for the pulse mode, it is necessary to identify current pulses of a few uA in amplitude and with a duration of about ten nanoseconds, which implies a bandwidth that extends up to 10 or 20 MHz. In the frame of the industrialization of the MONACO system, a new preamplifier was designed to meet those requirements. With a first prototype, LDCI and I-TECH performed very promising bench tests in October 2020. Tests with synthetic signals corresponding to pulse and fluctuation mode showed very good performance of the electronics. The positive and negative current pulses are correctly amplified and the measurement noise was estimated at 0.1 µApp thanks to proper electronic shielding. The DC measurement is also satisfactory in the tested range with an accuracy of less than nA and a bandwidth of 1kHz. Preamplifier qualifications are planned within realistic experiments using a fission chamber placed in a neutron field.Bisiach DaniloBarbot LoïcDe Izarra GrégoireDestouches ChristopheCargnelutti ManuelZorzut SebastjanEDP Sciencesarticleminiature fission chamberneutron flux measurementtransimpedance amplifierlow current measurementPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 04015 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	miniature fission chamber neutron flux measurement transimpedance amplifier low current measurement Physics QC1-999
spellingShingle	miniature fission chamber neutron flux measurement transimpedance amplifier low current measurement Physics QC1-999 Bisiach Danilo Barbot Loïc De Izarra Grégoire Destouches Christophe Cargnelutti Manuel Zorzut Sebastjan Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement
description	Fission chambers are widely used in nuclear reactors, either occasionally to probe the neutron flux maps in nuclear power plants or as part of the nuclear instrumentation used in research reactors to characterize neutron flux levels in irradiation locations. Wide dynamic range acquisition systems are very limited in the nuclear instrumentation market. Thus, since 2012, CEA is developing the MONACO system, which allows measurement in pulse, fluctuation, and current mode running simultaneously on the same channel. The simultaneous use of three measurement modes places high requirements on the amplification stage. Indeed, the current mode exploits a bandwidth between 0 and a few kHz, while the fluctuation mode is based on the frequency range of 100 kHz 1MHz. Finally, for the pulse mode, it is necessary to identify current pulses of a few uA in amplitude and with a duration of about ten nanoseconds, which implies a bandwidth that extends up to 10 or 20 MHz. In the frame of the industrialization of the MONACO system, a new preamplifier was designed to meet those requirements. With a first prototype, LDCI and I-TECH performed very promising bench tests in October 2020. Tests with synthetic signals corresponding to pulse and fluctuation mode showed very good performance of the electronics. The positive and negative current pulses are correctly amplified and the measurement noise was estimated at 0.1 µApp thanks to proper electronic shielding. The DC measurement is also satisfactory in the tested range with an accuracy of less than nA and a bandwidth of 1kHz. Preamplifier qualifications are planned within realistic experiments using a fission chamber placed in a neutron field.
format	article
author	Bisiach Danilo Barbot Loïc De Izarra Grégoire Destouches Christophe Cargnelutti Manuel Zorzut Sebastjan
author_facet	Bisiach Danilo Barbot Loïc De Izarra Grégoire Destouches Christophe Cargnelutti Manuel Zorzut Sebastjan
author_sort	Bisiach Danilo
title	Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement
title_short	Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement
title_full	Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement
title_fullStr	Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement
title_full_unstemmed	Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement
title_sort	development of a wideband current amplifier dedicated to fission chamber measurement
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/428d7128f6964c3785f3ea5781a90d60
work_keys_str_mv	AT bisiachdanilo developmentofawidebandcurrentamplifierdedicatedtofissionchambermeasurement AT barbotloic developmentofawidebandcurrentamplifierdedicatedtofissionchambermeasurement AT deizarragregoire developmentofawidebandcurrentamplifierdedicatedtofissionchambermeasurement AT destoucheschristophe developmentofawidebandcurrentamplifierdedicatedtofissionchambermeasurement AT cargneluttimanuel developmentofawidebandcurrentamplifierdedicatedtofissionchambermeasurement AT zorzutsebastjan developmentofawidebandcurrentamplifierdedicatedtofissionchambermeasurement
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Development of a Wideband Current Amplifier dedicated to Fission Chamber Measurement

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