Low-frequency terrestrial tensor gravitational-wave detector

被引：36

作者：

Paik, Ho Jung ^{[1
]}

Griggs, Cornelius E. ^{[1
]}

Moody, M. Vol ^{[1
]}

Venkateswara, Krishna ^{[2
]}

Lee, Hyung Mok ^{[3
]}

Nielsen, Alex B. ^{[4
]}

Majorana, Ettore ^{[5
,6
]}

Harms, Jan ^{[7
,8
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[2] Univ Washington, Ctr Expt Nucl Phys & Astrophys, Seattle, WA 98195 USA

[3] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[4] Max Planck Inst Gravitat Phys, Callinstr 38, D-30167 Hannover, Germany

[5] INFN Sez Roma, I-00185 Rome, Italy

[6] Univ Roma La Sapienza, I-00185 Rome, Italy

[7] Univ Urbino Carlo Bo, I-50019 Sesto Fiorentino, Italy

[8] INFN Sez Firenze, I-50019 Sesto Fiorentino, Italy

来源：

CLASSICAL AND QUANTUM GRAVITY | 2016年 / 33卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

low-frequency gravitational-wave detector; tensor gravitational-wave detector; SOGRO; Newtonian noise mitigation; SUPERCONDUCTING GRAVITY GRADIOMETER; BLACK-HOLES; NOISE; INTERMEDIATE; CLUSTERS;

D O I：

10.1088/0264-9381/33/7/075003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Terrestrial gravitational-wave (GW) detectors are mostly based on Michelson-type laser interferometers with arm lengths of a few km and signal bandwidths of tens of Hz to a few kHz. Many conceivable sources would emit GWs below 10 Hz. A low-frequency tensor GW detector can be constructed by combining six magnetically levitated superconducting test masses. Seismic noise and Newtonian gravity noise are serious obstacles in constructing terrestrial GW detectors at such low frequencies. By using the transverse nature of GWs, a full tensor detector, which can in principle distinguish GWs from near-field Newtonian gravity, can be constructed. Such a tensor detector is sensitive to GWs coming from any direction with any polarization; thus a single antenna is capable of resolving the source direction and polarization. We present a design concept of a tensor GW detector that could reach a strain sensitivity of 10(-19)-10(-20) Hz(-1/2) at 0.2-10 Hz, compute its intrinsic detector noise, and discuss procedures of mitigating the seismic and Newtonian noise.

引用

页数：19

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