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A diagnosis method for properties of superconducting magnet using fast current discharge

The authors studied a diagnosis method to investigate the properties of superconducting magnets throughout their life. The magnet current, initially held constant, is damped with a short time constant. One can evaluate the properties of the magnet using the normal voltage, which may appear during th...

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Published in:	IEEE transactions on applied superconductivity 2001-03, Vol.11 (1), p.2595-2598
Main Authors:	Takeuchi, K., Asano, K., Hayashi, H.
Format:	Article
Language:	English
Subjects:	Applied sciences Bridge circuits Computer simulation Damping Diagnosis Electric potential Electrical engineering. Electrical power engineering Electromagnets Exact sciences and technology Magnetic flux Magnetic properties Mathematical models Numerical simulation Phase measurement Resistors Superconducting magnets Telephony Various equipment and components Voltage Voltage measurement Waveforms
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description	The authors studied a diagnosis method to investigate the properties of superconducting magnets throughout their life. The magnet current, initially held constant, is damped with a short time constant. One can evaluate the properties of the magnet using the normal voltage, which may appear during the damping phase. A bridge circuit, which can adjust both amplitude and phase with over five orders of accuracy, was developed to measure unbalance voltages. Experiments were carried out using a small solenoidal NbTi magnet. By adjusting bridge parameters and numerically processing the voltage waveform, the authors measured the normal transition voltage with the S/N ratio of over 10/sup -4/ in the damping phase. The applicability of the diagnosis method was studied in both numerical simulations and experiments.
doi_str_mv	10.1109/77.920399
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source	IEEE Xplore (Online service)
subjects	Applied sciences Bridge circuits Computer simulation Damping Diagnosis Electric potential Electrical engineering. Electrical power engineering Electromagnets Exact sciences and technology Magnetic flux Magnetic properties Mathematical models Numerical simulation Phase measurement Resistors Superconducting magnets Telephony Various equipment and components Voltage Voltage measurement Waveforms
title	A diagnosis method for properties of superconducting magnet using fast current discharge
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