Title :
SQUID gradiometer measurement system for magnetorelaxometry in a disturbed environment
Author :
Schambach, J. ; Warzemann, L. ; Weber, P. ; Kotitz, R. ; Weitschies, W.
Author_Institution :
Friedrich-Schiller-Univ., Jena, Germany
fDate :
6/1/1999 12:00:00 AM
Abstract :
A SQUID measurement system for magneto-relaxometry (MRX) in disturbed environment is presented. It was developed for the determination of the distribution of magnetic nanoparticles in large objects like animals. The system is based on a thin film LTS SQUID gradiometer with a baseline of 5 mm and a field gradient sensitivity of about 30 fT/cmHz/sup 1/2/. The entire system is PC-controlled and includes a nonmagnetic x-y stage. A Helmholtz coil of 80 cm diameter allows the magnetization of the samples with fields up to 7 mT. First measurements in a disturbed environment are presented.
Keywords :
SQUID magnetometers; magnetic particles; magnetic relaxation; nanostructured materials; 7 mT; Helmholtz coil; PC control; animal; disturbed environment; magnetic nanoparticle; magnetization; magnetorelaxometry; measurement system; thin film LTS SQUID gradiometer; Coils; Immune system; Magnetic domains; Magnetic field measurement; Magnetic flux; Magnetic separation; Magnetic shielding; Magnetization; Nanoparticles; SQUIDs;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
