| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid helium feed unit, which can supply liquid helium continuously at constant flow rate without stopping the operation of the liquid helium feed unit in a liquid helium storage tank. SOLUTION: The liquid helium feed unit equipped with the liquid helium storage tank 1, a liquid helium vessel 4 and helium gas steel cylinder 6, whose configuration is characterized in that helium gas from the helium gas steel cylinder is cooled down by a heat exchanger 3 arranged in the liquid helium vessel and cooled liquid helium is supplied to the liquid helium storage tank 1.
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