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Time calibration and positioning for KM3NeT

AuthorsHernández Rey, Juan José ; Toscano, Simona ; Ardid Ramírez, M.; Circella, M.; Perkin, J.; Schuller, J-P.; Thompson, L. F.; Bou Cabo, Manuel
KeywordsNeutrino telescope
Time calibration
Acoustic positioning
Issue Date11-Apr-2009
CitationNuclearInstrumentsandMethodsinPhysicsResearch A: 602(2009)183–186
AbstractIn this contribution we review the concepts put forward for the time calibration and positioning systems of the future KM3NeT neutrino telescope in the Mediterranean Sea. Even though the final layout of the detector, its mechanical structures and the light detection technologies to be used are not yet defined, much progress has been made in clarifying the possible technologies available for calibration and positioning. Concerning time calibration, we review the different concepts proposed, namely optical beacons (LED and laser), fibres or copper cables, 40K, and a pre-deployment calibration. For positioning, the use of acoustic signals with lower frequency components in combination with cheaper hydrophones than in ANTARES is being investigated. The need and use of compasses and tiltmeters is strongly correlated to the mechanical structure chosen. For absolute positioning several methods are being considered. In the following, the solutions proposed in the KM3NeT Conceptual Design Report (CDR) [2001, available at: left angle brackethttp://www.km3net.org/CDR/right-pointing angle bracket] are discussed.
DescriptionNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume 602, Issue 1, 11 April 2009, Pages 183-186 Proceedings of the 3rd International Workshop on a Very Large Volume Neutrino Telescope for the Mediterranean Sea
Publisher version (URL)http://dx.doi.org/10.1016/j.nima.2008.12.069
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