Newtonian noise cancellation in tensor gravitational wave detector

11th Edoardo Amaldi Conference on Gravitational Waves

Paik, Ho Jung^1 ; Harms, Jan^2

Department of Physics, University of Maryland, College Park

MD

20742, United States^1

Universita degli Studi di Urbino Carlo Bo, INFN Sezione di Firenze, Sesto Fiorentino

I-50019, Italy^2

关键词: Directional search;    Environmental sensor;    Gravitational wave detectors;    High sensitivity;    New approaches;    Noise cancellation;    Noise suppression;    Orders of magnitude;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/716/1/012025/pdf
DOI  :  10.1088/1742-6596/716/1/012025

来源: IOP

【 摘 要 】

Terrestrial gravity noise produced by ambient seismic and infrasound fields poses one of the main sensitivity limitations in low-frequency ground-based gravitational-wave (GW) detectors. This noise needs to be suppressed by 3-5 orders of magnitude in the frequency band 10 mHz to 1 Hz, which is extremely challenging. We present a new approach that greatly facilitates cancellation of gravity noise in full-tensor GW detectors. It makes explicit use of the direction of propagation of a GW, and can therefore either be implemented in directional searches for GWs or in observations of known sources. We show that suppression of the Newtonian-noise foreground is greatly facilitated using the extra strain channels in full-tensor GW detectors. Only a modest number of auxiliary, high-sensitivity environmental sensors is required to achieve noise suppression by a few orders of magnitude.