Discussion on 'Peculiarities of SQUID magnetometer application in TEM' (G. Panaitov, M. Bick, Y. Zhang and H.‐J Krause, GEOPHYSICS, 67, 739‐745)

Autor:	Brian R. Spies
Rok vydání:	2004
Předmět:	Physics Frequency response Electromagnetics High-temperature superconductivity Condensed matter physics Magnetometer Highly selective law.invention SQUID Geophysics Nuclear magnetic resonance Geochemistry and Petrology law Waveform Sign (mathematics)
Zdroj:	GEOPHYSICS. 69:624-625
ISSN:	1942-2156 0016-8033
DOI:	10.1190/1.1736824
Popis:	Panaitov et al. (2001) describe certain peculiarities in measurements of time-domain electromagnetics (TEM) using superconducting quantum interference device (SQUID) sensors. In particular, they propose an explanation for sign reversals observed with the in-loop configuration in terms of remnant responses from earlier transmitted pulses of the repetitive transmitter waveform, and show several examples to demonstrate this effect. However, it appears that the data presented in their article are highly selective, and if realistic waveforms are used, sign reversals cannot be caused by the mechanism proposed.
Databáze:	OpenAIRE
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