MgB2 SYSTEM SUPERCONDUCTIVITY WIRE FOR LIQUID HYDROGEN LIQUID LEVEL SENSOR, LIQUID HYDROGEN LIQUID LEVEL SENSOR, AND LEVEL METER FOR LIQUID HYDROGEN

PROBLEM TO BE SOLVED: To provide an MgBsystem superconductivity wire for liquid hydrogen liquid level sensor capable of maintaining that a non-immersion portion is not a superconductive state even if the non-immersion portion of the MgBsystem superconductivity wire for liquid hydrogen liquid level s...

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Bibliographische Detailangaben
Hauptverfasser:	YAMADA HIROYOSHI, MOCHIZUKI KAZUNARI, KOSHIZUKA NAOKI, SHIMURA SATOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRICITY MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an MgBsystem superconductivity wire for liquid hydrogen liquid level sensor capable of maintaining that a non-immersion portion is not a superconductive state even if the non-immersion portion of the MgBsystem superconductivity wire for liquid hydrogen liquid level sensors is not heated.SOLUTION: A wire for liquid hydrogen liquid level sensors made of MgBsystem superconductivity material containing Mg, B and Al is used. When electric resistance is substantially zero, critical temperature is 20 to 25K. A transition width which is a difference between a temperature when electric resistance starts to fall for zero and the critical temperature is 5K or less.