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Sensor and method for indicating the presence of a low magnetic field using high critical temperature superconductor ceramic material to absorb electromagnetic energy
Sensor and method for indicating the presence of a low magnetic field using high critical temperature superconductor ceramic material to absorb electromagnetic energy
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机译:使用高临界温度超导体陶瓷材料吸收电磁能来指示低磁场存在的传感器和方法
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摘要
A sensor and method for indicating the presence of a low magnetic field using high critical temperature superconductor ceramic material is comprised of a sensing element consisting essentially of the high critical temperature superconductor ceramic material without the need for further processing. The sensing element is cooled to a temperature below the critical temperature of the superconductor material, whereby the sensing element becomes superconducting. Electromagnetic energy is applied to the sensing element, a first portion of the energy being absorbed by the sensing element. The amount of the energy absorbed by the sensing element is detected. The sensing element is modulated to provide a reference signal and is biased to a predetermined absorption reference value, whereby a magnetic field of about 10.sup.-10 tesla or less near the sensing element results in a change in the absorption of the magnetic energy by the sensing element, the change being detected to indicate the presence of the magnetic field.
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