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

20.08.19
A recent article presented during the 2019 II Workshop on Metrology for Industry 4.0 and IoT describes the use of the PT2026 as a "novel kind of quasi-DC field marker"
M. Amodeo, P. Arpaia and M. Buzio, "A technique for the correction of long-term magnetic flux integrator drift," 2019 II Workshop on Metrology for Industry 4.0 and IoT (MetroInd4.0&IoT), Naples, Italy, 2019, pp. 143-147.
doi: 10.1109/METROI4.2019.8792916

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.
Date of Conference: 4-6 June 2019
Date Added to IEEE Xplore12 August 2019