Bulletin of the American Physical Society
APS April Meeting 2013
Volume 58, Number 4
Saturday–Tuesday, April 13–16, 2013; Denver, Colorado
Session G5: Invited Session: Instrumentation for Current and Future Gravitational Wave Detectors |
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Sponsoring Units: GGR Chair: Michael Landry, LIGO Hanford Observatory Room: Governor's Square 14 |
Sunday, April 14, 2013 8:30AM - 9:06AM |
G5.00001: Status of Large Scale Gravitational Wave Detectors Invited Speaker: Brian O'Reilly In the next few years a worldwide network of gravitational wave detectors which are significant upgrades of existing facilities or new sites will commence operation at unprecedented sensitivity. Expectations are high that these detectors will make routine observations of gravitational waves from astrophysical sources such as coalescing binary systems and thereby bring a new set of observational tools to bear on the universe. The progress of upgrades and construction of these detectors will be discussed as will the timeline for them becoming operational at high sensitivities. [Preview Abstract] |
Sunday, April 14, 2013 9:06AM - 9:42AM |
G5.00002: Beyond Advanced Gravitational Wave Detectors: Beating the Quantum Limit with Squeezed States of Light Invited Speaker: Lisa Barsotti After two decades of technology development, the first direct observation of gravitational waves appears to be imminent. Ground-based interferometric gravitational wave detectors world-wide are about to come back on-line after a major upgrade aimed to significantly improve their sensitivity. As these advanced detectors become a reality, the gravitational wave community is looking at new ways of further expanding their astrophysical reach. The quantum nature of light imposes a fundamental limit to the sensitivity that gravitational wave detectors can achieve, due to statistical fluctuations in the arrival time of photons at the interferometer output (shot noise) and the recoil of the mirrors due to radiation pressure noise. In this talk I will show how mature technology can be used to push interferometric precision measurement beyond the standard quantum limit by means of squeezed states of light, and current ideas on how to integrate this technology into the Advanced detectors of the Laser Interferometer Gravitational wave Observatory (LIGO). [Preview Abstract] |
Sunday, April 14, 2013 9:42AM - 10:18AM |
G5.00003: Strategies for Thermal Noise Reduction in Future Gravitational Wave Detectors Invited Speaker: Nicolas Smith-Lefebvre Strategies for thermal noise reduction in future gravitational wave detectors. Interferometric gravitational wave detectors utilize kilometer-scale Michelson interferometers as a means of measuring minute length changes caused by gravitational waves from astrophysical sources. Thermal noise refers to the thermal vibrations of the mirror surface, substrate, and suspension system which tend to mask the desired gravitational wave signal. These effects are expected to be the limiting source of noise in much of the sensitive frequency range of the Advanced gravitational wave interferometers that are currently under construction. Development of new technologies will be required to further reduce thermal noise in the future. This talk will explore several possible avenues currently being investigated. These include the use of novel optical coatings based on crystalline materials, new materials for the mirror substrate and suspension system, and the use of cryogenics. [Preview Abstract] |
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