A New Device for Studying Low or Zero Frequency Mechanical Motion at Very Low Temperatures

被引：10
作者：
Bradley, D. I. [1 ]
Clovecko, M. [2 ]
Fear, M. J. [1 ]
Fisher, S. N. [1 ]
Guenault, A. M. [1 ]
Haley, R. P. [1 ]
Lawson, C. R. [1 ]
Pickett, G. R. [1 ]
Schanen, R. [1 ]
Tsepelin, V. [1 ]
Williams, P. [1 ]
机构：
[1] Univ Lancaster, Dept Phys, Lancaster, England
[2] Slovak Acad Sci, Inst Expt Phys, Ctr Low Temp Phys, Kosice 04001, Slovakia
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 2011年 / 165卷 / 3-4期
基金：
英国工程与自然科学研究理事会;
关键词：
Superfluid; Turbulence; Hydrodynamics; Mechanical oscillator; QUARTZ TUNING FORK; SUPERFLUID HE-3; GRID TURBULENCE; QUANTUM TURBULENCE; CRITICAL VELOCITY; LIQUID-HELIUM; TRANSITION; PHASE; GENERATION; CAVITATION;
D O I：
10.1007/s10909-011-0388-3
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have developed a new "floppy wire" device for studying the motion through quantum fluids and solids at very low temperatures. The device is particularly well suited for producing large amplitudes of motion, for measuring drag forces at low frequency, and for studying "zero" frequency dynamics by measuring transient behavior. The device is very versatile and allows motion to be studied over a broad range of velocities and amplitudes. It generates negligible heat leaks and so is ideally suited for ultra low temperature experiments. The device has many potential applications in quantum fluids and solids research, including the study of drag forces at low frequencies in both the laminar and turbulent flow regimes, and the investigation of motion in (super)solid He-4. We discuss the principles and modes of operation of the device and present some preliminary measurements in vacuum, in normal liquid He-3 and in superfluid He-4. We also present measurements of a "floppy grid" device, which could be used for generating large volumes of quantum turbulence in superfluids at low temperatures.
引用
收藏
页码：114 / 131
页数：18
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