Quartz Tuning Fork Pressure Gauge for High-Pressure Liquid Helium

被引：1

作者：

Botimer, J. ^{[1
]}

Velasco, A. ^{[1
]}

Taborek, P. ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2017年 / 186卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

Tuning fork; Hydrodynamics; Liquid helium; Superfluid; HE-II; VISCOSITY; DISSIPATION; TRANSITION; CIRCUIT;

D O I：

10.1007/s10909-016-1652-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured the quality factor Q and the frequency f of a 32-kHz quartz tuning fork immersed in liquid He-4 between 0.9 and 3.0 K, over pressures ranging from the saturated vapor pressure to approximate to 25 atm. At constant pressure, as a function of temperature, the quality factor and frequency have strong features related to the temperature dependence of the superfluid fraction. At constant temperature, Q depends on the superfluid fraction, while the frequency is a smooth function of pressure. The behavior is explained using a simple hydrodynamic model. The liquid helium viscosity is obtained from measured values of Q, and together with tabulated values of the helium density as a function of pressure and temperature, the frequency shift can be parameterized as a function of temperature and pressure. The observed sensitivity is approximate to 7.8 Hz/atm. The quartz tuning fork provides a compact low power method of measuring the pressure in the bulk liquid.

引用

页码：93 / 105

页数：13

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