A cryocooled helmet-shaped MEG measurement system

Authors
Sata, K Yoshida, T Fujimoto, S Miyahara, S Kang, YM
Citation
K. Sata et al., A cryocooled helmet-shaped MEG measurement system, SUPERCOND S, 12(11), 1999, pp. 959-962
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
ISSN journal
09532048 → ACNP
Volume
12
Issue
11
Year of publication
1999
Pages
959 - 962
Database
ISI
SICI code
0953-2048(199911)12:11<959:ACHMMS>2.0.ZU;2-A
Abstract
We developed a cryocooled helmet-shaped magnetoencephalographic measurement system. We determined the sources of white noise that contribute to the to tal white noise of this system and determined the source of cyclic noise ge nerated by the Gifford-McMahon-Joule-Thomson cryocooler. Design modificatio ns based on these results will reduce the white noise of our future cryocoo led systems to 5 fT Hz(-1/2) for cyclic noise to 1 pT.