As part of the JST project, we have been developing advanced high-temperature superconducting quantum interference devices (HTS SQUIDs) for biomedical diagnosis and nondestructive testing. In this paper, we show the recent progress of our research. First, we show a highly sensitive and reliable HTS SQUID sensor. Using HTS SQUIDs, we have developed advanced magnetic-sensing systems. We show the results of biosensing systems, such as magnetocardiogram measurement of small animals, magnetic immunoassay and low field MRI. We also show the results of nondestructive testing systems, such as evaluation of solar-cell panels, rapid and quantitative detection of water, and detection of small magnetic contamination. We demonstrate the promising results of these magnetic-sensing techniques.
This project aims to establish key hard technologies for large-scale high-temperature superconducting (HTS) rotating machines for a ship propulsion system. Using HTS technology, compact, right weighted and highly efficient ship propulsion motors can be realized. The objectives of the project are R&D of robust and reliable HTS field coils with low loss,and compact cooling systems integrated to a rotor and design technology for a 20 MW-class ship propulsion motor. This project is now in the first year of the stage III; stage II was completed in the last Japanese fiscal year. This report reviews the R&D results in stage II and the plans in stage III.