TY - JOUR
T1 - High-temperature superconducting gradiometer coupled with large pickup coil made of GdBCO coated conductor
AU - Tsukamoto, Akira
AU - Adachi, Seiji
AU - Oshikubo, Yasuo
AU - Hato, Tsunehiro
AU - Tanabe, Keiichi
AU - Enpuku, Keiji
N1 - Funding Information:
Manuscript received August 01, 2010; accepted December 06, 2010. Date of publication January 20, 2011; date of current version May 27, 2011. This work was a part of mineral exploration renovating program conducted by Japan Oil, Gas and Metals National Corporation (JOGMEC) and was supported by Ministry of Economy, Trade and Industry, Japan.
PY - 2011/6
Y1 - 2011/6
N2 - We have fabricated a large high-temperature superconducting gradiometer for geophysical application such as a Transient Electro-Magnetic (TEM) method. The seamless gradiometric pickup coil was made of a commercially available GdBCO coated conductor formed on a Hastelloy tape. Two pickup loops with a diameter of 100 mm and an integrated input coil on a SQUID chip were connected with low resistance contacts. The input coil was magnetically coupled with a directly-coupled gradiometer which was made by a RE123-based multi-layer process including two superconducting layers with crossover, contact structure and ramp edge Josephson junctions. The baseline length defined as the distance of two pickup loops is about 130 mm. The performances of the gradiometer such as flux noise, gradiometer balance and frequency dependence of sensitivity were investigated.
AB - We have fabricated a large high-temperature superconducting gradiometer for geophysical application such as a Transient Electro-Magnetic (TEM) method. The seamless gradiometric pickup coil was made of a commercially available GdBCO coated conductor formed on a Hastelloy tape. Two pickup loops with a diameter of 100 mm and an integrated input coil on a SQUID chip were connected with low resistance contacts. The input coil was magnetically coupled with a directly-coupled gradiometer which was made by a RE123-based multi-layer process including two superconducting layers with crossover, contact structure and ramp edge Josephson junctions. The baseline length defined as the distance of two pickup loops is about 130 mm. The performances of the gradiometer such as flux noise, gradiometer balance and frequency dependence of sensitivity were investigated.
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U2 - 10.1109/TASC.2010.2099638
DO - 10.1109/TASC.2010.2099638
M3 - Article
AN - SCOPUS:79957933716
SN - 1051-8223
VL - 21
SP - 358
EP - 362
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3 PART 1
M1 - 5696781
ER -