Integration Issues of Graphoepitaxial High-Tc SQUIDs Into Multichannel MEG Systems

被引：6

作者：

Faley, M. I. ^{[1
]}

Gerasimov, I. A. ^{[2
]}

Faley, O. M. ^{[3
]}

Chocholacs, H. ^{[1
]}

Dammers, J. ^{[1
]}

Eich, E. ^{[1
]}

Boers, F. ^{[1
]}

Shah, N. J. ^{[1
]}

Sobolev, A. S. ^{[2
,4
]}

Slobodchikov, V. Yu. ^{[4
]}

Maslennikov, Yu. V. ^{[4
]}

Koshelets, V. P. ^{[4
]}

Dunin-Borkowski, R. E. ^{[1
]}

机构：

[1] Forschungszentrum Julich, D-52428 Julich, Germany

[2] Moscow Inst Phys & Technol, Moscow 141700, Russia

[3] Rhein Westfal TH Aachen, D-52062 Aachen, Germany

[4] Kotelnikov Inst Radio Engn & Elect RAS, Moscow 125009, Russia

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2015年 / 25卷 / 03期

关键词：

Josephson junctions; magnetoencephalography; magnetometers; SQUIDs;

D O I：

10.1109/TASC.2014.2365098

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We have analyzed the possibility to construct multichannel magnetoencephalography (MEG) systems based on high-Tc direct current superconducting quantum interference devices (DC SQUIDs) with graphoepitaxial step edge Josephson junctions. A new layout of multilayer high-Tc superconducting flux transformers was tested and a new type of high-Tc DC SQUID magnetometer intended for MEG systems was realized. These magnetometers have a vacuum-tight capsule of outer diameter 24 mm and a magnetic field resolution of similar to 4 fT/root Hz at 77 K. Crosstalk between adjacent sensors was estimated and measured for in-plane and axial configurations. The vibration-free cooling of sensors, minimization of the sensor-to-object distance and optimization of the sensor positions as well as the gantry design are discussed. Our findings may have implications for the next generation of non-invasive imaging techniques that will be used to understand human brain function.

引用

页数：5

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