New technique to measure the mechanical quality factor of metals using spherical samples

被引：4

作者：

de Waard, A

Frossati, G

Zendri, JP

Coccia, E

Fafone, V

机构：

[1] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands

[2] Univ Trent, Dipartimento Fis, I-38050 Trent, Italy

[3] Ist Nazl Fis Nucl, Grp Collegato, Sez Padova, I-38050 Trent, Italy

[4] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[5] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00173 Rome, Italy

来源：

PHYSICA B | 2000年 / 280卷 / 1-4期

关键词：

mechanical quality factor; internal friction; gravitational wave detectors;

D O I：

10.1016/S0921-4526(99)01854-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We developed a new technique for measuring the mechanical quality factor of metals from room temperature down to 10 mK. Spherical resonators with a diameter of 150 mm were suspended from the center with a copper rod. Since a sphere has a large number of resonant modes it is always possible to find some which are practically unaffected by the suspension and it can be assumed they are representative of the 'intrinsic' values. With this method we measured a Q-factor of 120 million in A15056, the highest published value for a metal. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：535 / 536

页数：2