Bulletin of the American Physical Society
2007 APS April Meeting
Volume 52, Number 3
Saturday–Tuesday, April 14–17, 2007; Jacksonville, Florida
Session E6: GGR Prize Session |
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Sponsoring Units: GGR Chair: Richard Isaacson, NSF (formerly) Room: Hyatt Regency Jacksonville Riverfront Grand 7 |
Saturday, April 14, 2007 3:30PM - 4:06PM |
E6.00001: Gravity Wave Detection - Some Past Efforts and Ideas for the Future. Invited Speaker: Most of the early attempts to detect gravitational waves were stimulated by the experiments of Joseph Weber, and many of them involved techniques using suspended bars with adequate sensitivity to check Weber's claimed findings, but usually hardly capable of detecting likely gravity-wave signals of the strength expected from astrophysical phenomena. Major advances in sensitivity are desirable, and a wide variety of ideas to achieve this have been explored. These have included use of optical interferometer sensing with multiple mirrors, Herriott delay lines, White cell optics with mechanical levers, and long high-finesse optical cavities. Ideas for improved test mass suspensions have included special magnetic levitation techniques and the coupling of suspension systems together. Some of these and other ideas, and experiences with them, will be reviewed, as well as future possibilities for ground-based gravitational wave experiments in general. Advantages and difficulties of similar observations in space will also be briefly discussed. [Preview Abstract] |
Saturday, April 14, 2007 4:06PM - 4:42PM |
E6.00002: Current State of the LIGO Detectors Invited Speaker: The basic physics of the detector will be described: how the the interferometer interacts with a gravitational wave and the noise sources that limit the measurements. The actual performance of the detectors, the result of a great deal of hard work and elegant diagnostics by members of the LIGO collaboration, will be presented. The talk will end with some ideas for incremental improvements in the initial detectors. The major improvements in the detectors, associated with the Advanced LIGO detector project, will be described in a presentation by David Reitze at this meeting. The data analysis and results of science runs made with the initial LIGO and GEO detectors are discussed by Gabriela Gonzalez. [Preview Abstract] |
Saturday, April 14, 2007 4:42PM - 5:18PM |
E6.00003: Searches for gravitational waves from astrophysical sources Invited Speaker: Interferometric gravitational wave detectors have achieved unprecedented sensitivity to gravitational waves, expected from astrophysical sources of different kinds: brief transients from violent events like supernova explosions and collisions of neutron stars and black holes, coalescence of binary compact systems, continuous waves from rotating systems, and and a possible stochastic background of gravitational waves. I will describe the astrophysical sources generating gravitational waves in the frequency band of Earth based detectors, and the methods used to search for their signals. I will present some of the results obtained in data collected with the LIGO and GEO detectors, as well as describe the prospects for the present and future detectors. [Preview Abstract] |
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