【摘要】 本文介绍一种复现4He超流转变点 ( 2 1 768K)的密封瓶器件 ,复现方法简单 ,易于实现 ,可获得长达数小时的4He超流转变温坪。改变热流量 ,测出不同热流下对应的下压温坪值 ,外推到零热流 ,得到超流转变温度复现值。 3只密封瓶多次复现的标准偏差 (复现性 )为 0 0 4mK。更多还原

【Abstract】 This paper introduces a sealed cell using to realize the 4He superfluid transition temperature. The transition plateau could be kept as long as several hours. By changing the heat flow passed through the capillary of the sealed cell, a series of plateaus have been made. The superfluid transition temperature is determined by extrapolating to zero heat flow. The standard deviation of several realizations for three sealed cells is 0 04 mK.更多还原