TY - JOUR
T1 - Noise properties of highly balanced YBa2Cu3Oy directly coupled gradiometers and MCG measurement in magnetically unshielded environment
AU - Tsukamoto, A.
AU - Yokosawa, K.
AU - Fukazawa, T.
AU - Suzuki, D.
AU - Tsukada, K.
AU - Miyashita, T.
AU - Kandori, A.
AU - Takagi, K.
PY - 2002/3/1
Y1 - 2002/3/1
N2 - We have fabricated a first-order, directly coupled gradiometer with a gradiometric balance below 0.1% without balance adjustment by selecting the coupling direction of the pickup coil and the superconducting quantum interference device. The noise of the gradiometers with various balances measured in an unshielded environment decreased in proportion to the improvement in balance. However, the noise of the gradiometer with a balance of 0.03% was limited by the gradient field component of the environmental noise. Magnetocardiogram measurement with this gradiometer in an unshielded environment was also demonstrated.
AB - We have fabricated a first-order, directly coupled gradiometer with a gradiometric balance below 0.1% without balance adjustment by selecting the coupling direction of the pickup coil and the superconducting quantum interference device. The noise of the gradiometers with various balances measured in an unshielded environment decreased in proportion to the improvement in balance. However, the noise of the gradiometer with a balance of 0.03% was limited by the gradient field component of the environmental noise. Magnetocardiogram measurement with this gradiometer in an unshielded environment was also demonstrated.
KW - Gradiometer
KW - SQUID
KW - YBaCuO
UR - http://www.scopus.com/inward/record.url?scp=0036498260&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036498260&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)01137-6
DO - 10.1016/S0921-4534(01)01137-6
M3 - Article
AN - SCOPUS:0036498260
SN - 0921-4534
VL - 368
SP - 41
EP - 44
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 1-4
ER -