Caiafa, Gianni (2018) Induction-coil transducers for measuring transversal field harmonics in accelerator magnets. [Tesi di dottorato]


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Item Type: Tesi di dottorato
Resource language: English
Title: Induction-coil transducers for measuring transversal field harmonics in accelerator magnets
Date: 11 December 2018
Number of Pages: 141
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Elettrica e delle Tecnologie dell'Informazione
Dottorato: Information technology and electrical engineering
Ciclo di dottorato: 31
Coordinatore del Corso di dottorato:
Arpaia, PasqualeUNSPECIFIED
Date: 11 December 2018
Number of Pages: 141
Keywords: Magnetic Measurement, Induction-Coil Sensors, Pseudo-Multipoles, Local Field Distribution, Flexible Circuit Board, Iso-Perimetric Coil
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-INF/07 - Misure elettriche e elettroniche
Date Deposited: 22 Jan 2019 22:05
Last Modified: 17 Jun 2020 07:40

Collection description

The following thesis deals with the mathematical development, the numerical validation, the design, and the metrological characterization of an innovative sensor for magnetic measurements based on rotating coils. The developed mathematical model, linking experimental data and the field description in the aperture of magnets for accelerator, was numerically validated using simulated data. The validation results made it possible to check the correlation between measurements and the mathematical model itself. Furthermore, the numerical validation allowed to satisfy the constraints for the design and manufacturing tolerances of the sensor. The sensor that is required to perform local field distribution measurements along the magnet axis, must be not sensitive to the $z$-field component (namely to the field in the direction of beam travelling in the particle accelerator magnet). For this reason, the coil design is based on a certain number of loops placed on the same radius. This particular geometry has been called "Iso-perimetric". The sensor production, the transducer design, an innovative methodology for the sensitivity coefficients calculations and for the calibration procedure were carried out. Finally, the experimental results of the proof of principle of the first prototype, the design of the second prototype, and the measurements results are reported.


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