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Cryogenic resonant-cylinder gravity wave detectors – the search for higher dimensions
Gravity waves are feeble in our three dimensional spatial environment. The same are prominent in higher dimensions. The detection of gravity waves in our environment manifests the existence of higher dimensions right around us.
The International Gravitational Event Collaboration (IGEC) is the first ever network of cryogenic resonant-cylinder gravity wave detectors. It consists of five widely spaced detectors: one in the US (Baton Rouge), two in Italy (Legnaro and Frascati), one in Switzerland (at CERN), and one in Australia (Perth).
Searching for passing gravity waves is a delicate art since it involves sensing deformations much smaller than the size of an atomic nucleus in huge detectors meters or kilometers in size. In the resonant detector approach this means watching for longitudinal vibrations in chilled automobile-sized metal cylinders.
IGEC demonstrated that a network of many simultaneously operating detectors can achieve a negligible false alarm rate, an indication of how well the detector network can it is discriminate against spurious signals when looking for rare events. The false alarm rate is already as good as 10-6 per year of observation with 4 detectors, a figure of merit thought to be satisfactory by most astronomers and those working with neutrino detectors.
Gravity wave detectors are real and is taking the investigation of higher dimensions to the higher level.
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