In the framework of magnetic measurements in particle accelerators, the problem of the drift due to integration of a voltage offset causes a lack of stability, which is inadequate for long-term measurements. In this paper, a new approach for the modelling and correction of long-term drift in integrators is discussed. In particular, a feed-forward drift correction method has been developed analytically and tested using experimental data taken from an existing real-time magnetic measurement system. Among all the sensors, NMR was chosen for the integration constant due to its accuracy (10 −6 ) and the Metrolab PT2026 NMR teslameter has been tested successfully as a novel kind of quasi-DC field marker. The combination of feed-forward correction and PT2026 as a marker will allow the future real-time magnetic measurement systems to meet the very strict specification of 1 μT field stability over durations of the order of minutes. In certain cases, such as in ELENA, this method offers a way to reduce by three orders of magnitude the drift-induced field error with respect to the existing system.

A technique for the correction of long-term magnetic flux integrator drift / Amodeo, Maria; Pasquale, Arpaia; Marco, Buzio. - ELETTRONICO. - (2019), pp. 143-147. (Intervento presentato al convegno 2019 IEEE INTERNATIONAL WORKSHOP ON Metrology for Industry 4.0 and Internet of Things tenutosi a Napoli nel 04/06/2019 - 06/06/2019) [10.1109/METROI4.2019.8792916].

A technique for the correction of long-term magnetic flux integrator drift

AMODEO, MARIA;
2019

Abstract

In the framework of magnetic measurements in particle accelerators, the problem of the drift due to integration of a voltage offset causes a lack of stability, which is inadequate for long-term measurements. In this paper, a new approach for the modelling and correction of long-term drift in integrators is discussed. In particular, a feed-forward drift correction method has been developed analytically and tested using experimental data taken from an existing real-time magnetic measurement system. Among all the sensors, NMR was chosen for the integration constant due to its accuracy (10 −6 ) and the Metrolab PT2026 NMR teslameter has been tested successfully as a novel kind of quasi-DC field marker. The combination of feed-forward correction and PT2026 as a marker will allow the future real-time magnetic measurement systems to meet the very strict specification of 1 μT field stability over durations of the order of minutes. In certain cases, such as in ELENA, this method offers a way to reduce by three orders of magnitude the drift-induced field error with respect to the existing system.
2019
978-1-7281-0429-4
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2751357
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