THERMAL RESPONSE OF NORMAL AND SUPERFLUID-HELIUM TO AN AC HEAT-FLUX

被引：2

作者：

OLAFSEN, JS

BEHRINGER, RP

机构：

[1] Duke University Durham

来源：

PHYSICA B | 1994年 / 194卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4526(94)90627-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Measurements of the thermal response, DELTAT(w), across a layer of helium in its normal and superfluid phases have been made for an AC heat source, Q(t) = Q(o)exp(iwt). Previous DC measurements below T(lambda) have indicated a dependence on the layer thickness, d, for k(eff) at low concentrations, X, suggesting an intrinsic length scale within the fluid. A DELTAT(w) profile is ideally suited to reveal any internal length scales of the fluid. The apparatus also permits d to be varied continuoulsy and in situ from zero to 3mm.

引用

页码：595 / 596

页数：2