ULTRAHIGH Q PENDULUM SUSPENSIONS FOR GRAVITATIONAL-WAVE DETECTORS

被引：30

作者：

BLAIR, DG

JU, L

NOTCUTT, M

机构：

[1] Department of Physics, University of Western Australia, Nedlands

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1993年 / 64卷 / 07期

关键词：

D O I：

10.1063/1.1143974

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Pendulum suspensions for laser interferometer gravitational wave detectors need to have an extremely high Q factor to minimize Brownian motion noise. In this paper we analyze the limits to the Q factor of the compound pendulum. We show that the observed acoustic loss of niobium can allow pendulum Q factors of 10(10) to be achieved. This should enable a 3 km terrestrial laser interferometer detector to achieve strain sensitivity of 10(-22)/square-root Hz at frequencies as low as 10 Hz. At cryogenic temperatures Q factors up to 10(12) should be achievable.

引用

页码：1899 / 1904

页数：6