NEUROMAGNETIC SQUID MEASUREMENTS IN A HELMET-TYPE SUPERCONDUCTING MAGNETIC SHIELD OF BSCCO

被引：19

作者：

Ohta, H. ^{[1
]}

Koike, A. ^{[2
]}

Hoshino, K. ^{[2
]}

Kotaka, H. ^{[2
]}

Sudoh, E. ^{[2
]}

Kato, K. ^{[2
]}

Takahara, H. ^{[2
]}

Uchikawa, Y. ^{[3
]}

Shinada, K. ^{[4
]}

Takahata, M. ^{[4
]}

Yamada, Y. ^{[4
]}

Matsui, T. ^{[5
]}

机构：

[1] RIKEN, Inst Phys & Chem Res, Hirosawa 2-1, Wako, Saitama 35101, Japan

[2] Mitsui Min & Smelting Co Ltd, Corp R&D Ctr, Haraichi 1333-2, Ageo, Saitama 362, Japan

[3] Tokyo Denki Univ, Hatoyama, Saitama 35003, Japan

[4] Shimadzu Corp, Keihanna Res Lab, Seika, Kyoto 61902, Japan

[5] Minist Posts & Telecommun, Commun Res Lab, Nukuikitamachi 4-2-1, Koganei, Tokyo 184, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期

关键词：

D O I：

10.1109/77.233577

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：

A SQUID magnetometer has successfully detected magnetic fields emitted from a human brain in a helmet-size superconducting magnetic shield of high-T-c superconductor Bi-Sr-Ca-Cu-O-x. The sensitivities of the rf-SQUID and the dc-SQUID of Quasi-Planar Josephson junctions - superconducting weak links are 20 fT/root Hz and 4.8 fT/root Hz respectively. The magnetic shield can reduce a magnetic field to - 120 dB or 10(-6) even at as low a frequency as 0.2 Hz. We have detected somatosensory evoked magnetic fields stimulating the tibial nerves of the patient by current pulses.

引用

页码：1953 / 1956

页数：4

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