An electromagnetic method for measuring AC losses in HTS tapes without lock-in amplifier

Autor:	Gaetano Pasini, Fabio Filicori, Marco Breschi, Andrea Musso
Přispěvatelé:	Breschi M., Filicori F., Musso A., Pasini G.
Rok vydání:	2020
Předmět:	HTS Tapes YBCO Superconductivity AC losses Lock-in amplifier AC loss measurement Transport current losses Superconductivity History Materials science business.industry Lock-in amplifier Optoelectronics business Computer Science Applications Education
Zdroj:	Journal of Physics: Conference Series. 1559:012066
ISSN:	1742-6596 1742-6588
Popis:	The measurement of AC losses in high temperature superconducting tapes is a complex task due to the small magnitude of the quantities to detect, and to the difficulty to separate the inductive and resistive parts of the measured voltage. This work describes a different approach to the electrical measurement of AC losses, not requiring lock-in amplifiers for the signal processing. The system is based on the acquisition of the voltage and current signals from the sample and their projection on a reference signal, performing a Hilbert transform based treatment procedure. This method allows one to retrieve the harmonic components of the signals with a significant noise reduction, thus improving the quality of the results. The experimental set-up is applied to measure AC losses in different HTS tapes, using sinusoidal currents of different amplitude and frequency. The results are compared with those obtained on the same tapes at other laboratories.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74ec84a9ed7be8ce77a9d679efbcfd23 https://doi.org/10.1088/1742-6596/1559/1/012066 Zobrazit plný text záznamu