Global optimization for future gravitational wave detectors' sites

Hu, Y.-M., Raffai, P., Gondán, L., Heng, I. S. , Kelecsényi, N., Hendry, M., Márka, Z. and Márka, S. (2015) Global optimization for future gravitational wave detectors' sites. Classical and Quantum Gravity, 32(10), 105010. (doi:10.1088/0264-9381/32/10/105010)

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Abstract

We consider the optimal site selection of future generations of gravitational wave (GW) detectors. Previously, Raffai et al optimized a two-detector network with a combined figure of merit (FoM). This optimization was extended to networks with more than two detectors in a limited way by first fixing the parameters of all other component detectors. In this work we now present a more general optimization that allows the locations of all detectors to be simultaneously chosen. We follow the definition of Raffai et al on the metric that defines the suitability of a certain detector network. Given the locations of the component detectors in the network, we compute a measure of the network's ability to distinguish the polarization, constrain the sky localization and reconstruct the parameters of a GW source. We further define the 'flexibility index' for a possible site location, by counting the number of multi-detector networks with a sufficiently high FoM that include that site location. We confirm the conclusion of Raffai et al, that in terms of the flexibility index as defined in this work, Australia hosts the best candidate site to build a future generation GW detector. This conclusion is valid for either a three-detector network or a five-detector network. For a three-detector network, site locations in Northern Europe display a comparable flexibility index to sites in Australia. However, for a five-detector network, Australia is found to be a clearly better candidate than any other location.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Heng, Professor Ik Siong and Hu, Mr Yiming and Hendry, Professor Martin
Authors: Hu, Y.-M., Raffai, P., Gondán, L., Heng, I. S., Kelecsényi, N., Hendry, M., Márka, Z., and Márka, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:Institute of Physics
ISSN:0264-9381
ISSN (Online):1361-6382
Copyright Holders:Copyright © 2015 IOP Publishing Ltd
First Published:First published in Classical and Quantum Gravity 32(10):105010
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technologies Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY