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Open AccessArticle

Accurate Magnetic Sensor System Integrated Design

1
Consorzio RFX, Corso Stati Uniti 4, 35127 Padova, Italy
2
Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(10), 2929; https://doi.org/10.3390/s20102929
Received: 27 April 2020 / Revised: 9 May 2020 / Accepted: 19 May 2020 / Published: 21 May 2020
(This article belongs to the Section Physical Sensors)
Inductive measurement of magnetic fields is a diagnostic technique widely used in several scientific fields, such as magnetically confined fusion, plasma thrusters and particle accelerators, where real time control and detailed characterization of physics phenomena are required. The accuracy of the measured data strongly influences the machine controllability and the scientific results. In the framework of the assembly modifications of the RFX-mod experiment, a complete renew and improvement of the magnetic diagnostic system, from the probes moved inside the vacuum vessel to the integrator modules, has been carried out. In this paper, the whole system making up the magnetic diagnostics is described, following the acquisition chain from the probe to the streamed data and illustrating the requirements and conflicting limitations which affect the different components, in order to provide a comprehensive overview useful for an integrated design of any new systems. The characterization of a prototypical implementation of the whole acquisition chain is presented, focusing on the flexible ADC architecture adopted for providing a purely numerical signal integration, highlighting the advantages that this technology offers in terms of flexibility, compactness and cost effectiveness, along with the limitations found in existing implementation in terms of ADC noise characteristics and their possible solutions. View Full-Text
Keywords: magnetic measurements; magnetic sensor; inductive probe; integrator drift; noise; plasma; nuclear fusion magnetic measurements; magnetic sensor; inductive probe; integrator drift; noise; plasma; nuclear fusion
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MDPI and ACS Style

Marconato, N.; Cavazzana, R.; Bettini, P.; Rigoni, A. Accurate Magnetic Sensor System Integrated Design. Sensors 2020, 20, 2929.

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