High Quality Tuning Forks in Superfluid 3He-B Below 200 μK

被引：0

作者：

Marcel Človečko

Emil Gažo

Martin Kupka

Maroš Skyba

Peter Skyba

机构：

[1] SAS and P.J. Šafárik University Košice,Centre of Low Temperature Physics, Institute of Experimental Physics

来源：

Journal of Low Temperature Physics | 2011年 / 162卷

关键词：

Mechanical resonators; Tuning forks; Superfluid ; He-B; Andreev reflection; Andreev bound states;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We have investigated the influence of the damping force acting on high quality tuning forks (Q∼106) of different sizes and geometries in superfluid 3He-B at temperatures below 200 μK and a pressure of 0.1 bar. The measurements show that at low velocities, the damping of the largest fork expressed in terms of its resonance characteristic width Δf2 rises up as its velocity increases. This is in contradiction to the damping of the fork due to Andreev reflection and it may be caused by the interaction of this fork with excitations trapped in the Andreev bond states. We present our preliminary experimental results.

引用

页码：669 / 677

页数：8

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