Advanced LIGO
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Résumé
The Advanced LIGO gravitational wave detectors are second-generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA, USA. The two instruments are identical in design, and are specialized versions of a Michelson interferometer with 4 km long arms. As in Initial LIGO, Fabry–Perot cavities are used in the arms to increase the interaction time with a gravitational wave, and power recycling is used to increase the effective laser power. Signal recycling has been added in Advanced LIGO to improve the frequency response. In the most sensitive frequency region around 100 Hz, the design strain sensitivity is a factor of 10 better than Initial LIGO. In addition, the low frequency end of the sensitivity band is moved from 40 Hz down to 10 Hz. All interferometer components have been replaced with improved technologies to achieve this sensitivity gain. Much better seismic isolation and test mass suspensions are responsible for the gains at lower frequencies. Higher laser power, larger test masses and improved mirror coatings lead to the improved sensitivity at mid and high frequencies. Data collecting runs with these new instruments are planned to begin in mid-2015.
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La notice
- Revue
- Classical and Quantum Gravity
- Thématique
- Pulsars and Gravitational Waves Research
- Domaine
- Physics and Astronomy
- Établissements canadiens
- Canadian Institute for Theoretical AstrophysicsUniversity of Toronto
- Organismes subventionnaires
- Govern de les Illes BalearsIstituto Nazionale di Fisica NucleareMinistero dello Sviluppo EconomicoNational Research Foundation of KoreaLeverhulme TrustHungarian Scientific Research FundIndustry CanadaNational Aeronautics and Space AdministrationScottish Funding CouncilScottish Universities Physics AllianceCouncil of Scientific and Industrial Research, IndiaScience and Technology Facilities CouncilNational Research FoundationAlfred P. Sloan FoundationMinisterio de Economía y CompetitividadNational Science Foundation
- Mots-clés
- LIGOPhysicsInterferometryGravitational waveSensitivity (control systems)Michelson interferometerOpticsGravitational-wave observatoryLaserDetectorFrequency bandAstrophysicsElectronic engineeringTelecommunicationsComputer scienceBandwidth (computing)Engineering
- Résumé présent dans OpenAlex
- oui