A DSP-Enhanced AC Susceptometer for Characterisation of Superconductors

被引：0

作者：

Babet, S. Sergio ^{[1
]}

Jarvis, A. L. Leigh ^{[1
]}

机构：

[1] Univ KwaZulu Natal, Sch Engn Elect Elect & Comp, Durban, South Africa

来源：

AFRICON, 2013 | 2013年

关键词：

superconductor; AC Susceptibility; critical temperature; critical current; lock-in amplifier;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper explains the design and implementation of a low-cost susceptometer. Much emphasis is laid on the implementation of a software-based lock-in amplifier as an alternative for an analogue based lock-in amplifier for the susceptomer's signal processing. The lock-in amplifier acts as a discriminating voltmeter measuring the inphase and the out-of-phase susceptibilities at a reference frequency, from a noisy environment, of high temperature superconducting samples. From susceptibility measurements, important parameters such as critical temperature and critical current were determined.

引用

页码：971 / 975

页数：5

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