Abstract
Abstract After we constructed the 200-meter superconducting DC power cable in spring of 2010, three experiments have been done until March, 2011. We changed and improved the experimental devices, especially to reduce the heat leak. We describe the experimental results and the data analysis for the pressure drop of liquid nitrogen circulation. We summarized the experimental results briefly, and estimate the pressure drop of the circulation for a longer cable system (∼2 km) depending on the experimental conditions. We also mentioned the performance of the system as compared with the copper cable.
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