title: Performance of a fast digital integrator in on-field magnetic measurements for particle accelerators.
abstract: The fast digital integrator has been conceived to face most demanding magnet test requirements with a resolution of 10 ppm, a signal-to-noise ratio of 105 dB at 20 kHz, a time resolution of 50 ns, an offset of 10 ppm, and on-line processing. In this paper, the on-field achievements of the fast digital integrator are assessed by a specific measurement campaign at the European Organization for Nuclear Research (CERN). At first, the architecture and the metrological specifications of the instrument are reported. Then, the recent on-field achievements of (i) ±10 ppm of uncertainty in the measurement of the main field for superconducting magnets characterization, (ii) ±0.02 % of field uncertainty in quality assessment of small-aperture permanent magnets, and (iii) ±0.15 % of drift, in an excitation current measurement of 600 s under cryogenic conditions, are presented and discussed.
authors.affiliation: Engineering Department, University of Sannio, 82100 Benevento, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Arpaia
authors.forename: L
authors.initials: L
authors.lastname: Bottura
authors.forename: L
authors.initials: L
authors.lastname: Fiscarelli
authors.forename: L
authors.initials: L
authors.lastname: Walckiers