Sensitivity and performance of the Advanced LIGO detectors in the third observing run
Duty cycle
DOI:
10.1103/physrevd.102.062003
Publication Date:
2020-09-11T15:04:19Z
AUTHORS (198)
ABSTRACT
On April 1st, 2019, the Advanced Laser Interferometer Gravitational-Wave Observatory (aLIGO), joined by Virgo detector, began third observing run, a year-long dedicated search for gravitational radiation. The LIGO detectors have achieved higher duty cycle and greater sensitivity to waves than ever before, with Hanford achieving angle-averaged binary neutron star coalescences distance of 111 Mpc, Livingston 134 Mpc factors 74.6% 77.0% respectively. improvement in stability is result several upgrades detectors, including doubled intracavity power, addition an in-vacuum optical parametric oscillator squeezed-light injection, replacement core optics end reaction masses, installation acoustic mode dampers. This paper explores purposes behind these upgrades, explains best our knowledge noise currently limiting each detector.
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