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Publication Citation: Cross-validation of microfabricated atomic magnetometers with SQUIDs for biomagnetic applications

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Author(s): Svenja A. Knappe; Tillman H. Sander; Olaf Kosch; Frank Wiekhorst; John E. Kitching; Lutz Trahms;
Title: Cross-validation of microfabricated atomic magnetometers with SQUIDs for biomagnetic applications
Published: September 28, 2010
Abstract: A chip-scale atomic magnetometer (CSAM) is compared with a superconducting quantum interference devices (SQUID) sensor in two biomedical applications. CSAMs are magnetic field sensors that operate at room temperature and are based on spectroscopy of alkali atoms in vapor cells with volumes of a few cubic millimeters. Magnetocardiograms (MCGs) of healthy subjects were measured simultaneously by a CSAM and a multichannel SQUID sensor in a magnetically shielded room. The typical features of MCGs are resolved. Furthermore, magnetorelaxometry (MRX) signals of iron nanoparticles were successfully obtained with both sensors.
Citation: Applied Physics Letters
Volume: 97
Pages: pp. 133703-1 - 133703-3
Keywords: atomic magnetometer;CSAM;magnetocardiogram;MCG;magnetorelaxometry;MRX;SQUID
Research Areas: Physics, Atomic Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (260KB)