Terrestrial detector for low-frequency gravitational waves based on full tensor measurement

11th Edoardo Amaldi Conference on Gravitational Waves

Paik, H.J.^1 ; Moody, M.V.^1 ; Griggs, C.E.^1 ; Lee, H.M.^2 ; Majorana, E.^3

Department of Physics, University of Maryland, College Park

MD

20742, United States^1

Department of Physics and Astronomy, Seoul National University, Seoul

151-747, Korea, Republic of^2

INFN Sezione di Roma, Universita Sapienza, Roma

I-00185, Italy^3

关键词: Gravitational wave detectors;    Low-frequency;    Low-frequency signals;    Measurement techniques;    New detectors;    Orthogonal axes;    Three degrees of freedom;    Two-dimensional detectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/716/1/012001/pdf
DOI  :  10.1088/1742-6596/716/1/012001

来源: IOP

【 摘 要 】

Two serious obstacles in constructing terrestrial gravitational wave (GW) detectors that can resolve low-frequency signals (≤ 10 Hz) are seismic and Newtonian noises. Here we describe a new detector concept by adopting new measurement techniques and configurations to overcome the present low-frequency barrier due to these noises. Six magnetically levitated superconducting test masses, widely separated along three orthogonal axes, each with three degrees of freedom, constitute a tensor GW detector. The tensor outputs could be combined to better reject the Newtonian noise. Unlike current two-dimensional detectors, a single tensor detector is able to determine the polarization of GWs and the direction to sources on its own.