Title :
A high performance static magnetic shielded room for detecting biomagnetic nanoparticles
Author :
Wang, Qingmeng ; Song, Tao ; Wang, Ming ; Zhang, Guanghao
Author_Institution :
Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing, China
Abstract :
A three-layer magnetic shielded room (MSR) has been built to house biomagnetic nanoparticles detecting system based on a low temperature Superconducting Quantum Interference Device (SQUID). The MSR with an open type door was designed to match the noise levels of SQUID coupled with one-order gradiometers while minimizing the overall facility cost. The room measures 2 × 2 × 2 m3 internally and consists of three-layer silicon-steel plate shell instead of the permalloy. The static shielding factor in the room is 25000 at which point the eminent magnetization is 2 nT. This valve matches the measurement of isothermal remanent magnetizations (IRM). We conclude that using cheap materials of silicon-steel plate with relative low permeability can also produce a high performance MSR.
Keywords :
SQUID magnetometers; biomagnetism; magnetic particles; magnetic variables measurement; nanoparticles; remanence; silicon; steel; SQUID noise level; Si-FeCJkJk; biomagnetic nanoparticle detecting system; biomagnetic nanoparticle detection; eminent magnetization; isothermal remanent magnetizations; low temperature SQUID; one order gradiometers; silicon-steel plate shell; size 2 m; static magnetic shielded room; superconducting quantum interference device; three layer magnetic shielded room; Biomagnetics; Magnetic devices; Magnetic shielding; Magnetization; Nanoparticles; SQUIDs; Superconducting device noise; Superconducting devices; Superconducting magnets; Temperature;
Conference_Titel :
Electromagnetic Compatibility (APEMC), 2010 Asia-Pacific Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-5621-5
DOI :
10.1109/APEMC.2010.5475568
