Metrology of Acquisition Chains and Signal Processing of LMJ Experiments

Since the first experiment in 2014, more and more plasma diagnostics are being deployed on the Laser MegaJoule (LMJ) facility manufactured by C.E.A/D.A.M. These diagnostics aim at measuring radiations or particles emitted during laser experiments to study high-energy physics, especially inertial con...

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Autor principal:	Trauchessec Vincent
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	metrology lmj digitizer deconvolution Physics QC1-999
Acceso en línea:	https://doaj.org/article/f0110dcfccd64f7eb769d18f879c9689
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id	oai:doaj.org-article:f0110dcfccd64f7eb769d18f879c9689
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spelling	oai:doaj.org-article:f0110dcfccd64f7eb769d18f879c96892021-12-02T17:12:45ZMetrology of Acquisition Chains and Signal Processing of LMJ Experiments2100-014X10.1051/epjconf/202125303001https://doaj.org/article/f0110dcfccd64f7eb769d18f879c96892021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_03001.pdfhttps://doaj.org/toc/2100-014XSince the first experiment in 2014, more and more plasma diagnostics are being deployed on the Laser MegaJoule (LMJ) facility manufactured by C.E.A/D.A.M. These diagnostics aim at measuring radiations or particles emitted during laser experiments to study high-energy physics, especially inertial confinement fusion (ICF). Different types of sensors surround the LMJ target chamber and realize the conversion of the quantities of interest to an electric signal. The signal is then transmitted via coaxial cables, acquired by a broadband oscilloscope, and digitally post-processed. Each step of this typical acquisition chain adds measurement errors and increases the global uncertainty. First, a numerical model of the digitizer alongside a specific hardware system designed to perform its metrology in situ will be presented. It computes errors sources such as offset, gain and skew, and provides a measurement of the effective number of bits (ENOB) of the digitizer. The experimental characterization of the electrical chain via its transfer function measurement will also be detailed. Finally, the numerical methods deployed to handle the inverse problem, based on deconvolution processes, will be introduced, including future developments exploiting Bayesian inferences and statistical approaches.Trauchessec VincentEDP SciencesarticlemetrologylmjdigitizerdeconvolutionPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 03001 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	metrology lmj digitizer deconvolution Physics QC1-999
spellingShingle	metrology lmj digitizer deconvolution Physics QC1-999 Trauchessec Vincent Metrology of Acquisition Chains and Signal Processing of LMJ Experiments
description	Since the first experiment in 2014, more and more plasma diagnostics are being deployed on the Laser MegaJoule (LMJ) facility manufactured by C.E.A/D.A.M. These diagnostics aim at measuring radiations or particles emitted during laser experiments to study high-energy physics, especially inertial confinement fusion (ICF). Different types of sensors surround the LMJ target chamber and realize the conversion of the quantities of interest to an electric signal. The signal is then transmitted via coaxial cables, acquired by a broadband oscilloscope, and digitally post-processed. Each step of this typical acquisition chain adds measurement errors and increases the global uncertainty. First, a numerical model of the digitizer alongside a specific hardware system designed to perform its metrology in situ will be presented. It computes errors sources such as offset, gain and skew, and provides a measurement of the effective number of bits (ENOB) of the digitizer. The experimental characterization of the electrical chain via its transfer function measurement will also be detailed. Finally, the numerical methods deployed to handle the inverse problem, based on deconvolution processes, will be introduced, including future developments exploiting Bayesian inferences and statistical approaches.
format	article
author	Trauchessec Vincent
author_facet	Trauchessec Vincent
author_sort	Trauchessec Vincent
title	Metrology of Acquisition Chains and Signal Processing of LMJ Experiments
title_short	Metrology of Acquisition Chains and Signal Processing of LMJ Experiments
title_full	Metrology of Acquisition Chains and Signal Processing of LMJ Experiments
title_fullStr	Metrology of Acquisition Chains and Signal Processing of LMJ Experiments
title_full_unstemmed	Metrology of Acquisition Chains and Signal Processing of LMJ Experiments
title_sort	metrology of acquisition chains and signal processing of lmj experiments
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/f0110dcfccd64f7eb769d18f879c9689
work_keys_str_mv	AT trauchessecvincent metrologyofacquisitionchainsandsignalprocessingoflmjexperiments
_version_	1718381413758140416

Metrology of Acquisition Chains and Signal Processing of LMJ Experiments

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