Time Calibration of the ANTARES Neutrino Telescope

Details Time Calibration of the ANTARES Neutrino Telescope Time Calibration of the ANTARES Neutrino Telescope

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....3.1537h&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

The ANTARES collab oration is deploying a neutrino telescope under the Mediterranean Sea [2]. A 3D array of photomultipliers (PMTs) will detect the Cherenkov light emitted by the muons produced in neutrino interactions. Since the reconstruction efficiency and pointing accuracy of the detector will depend on the correct determination of the arrival times of the Cherenkov light to the PMTs, the time calibration of the detector is a key issue. Intrinsic time fluctuations in the detector components indicate that an accuracy of σ ˜ 0.5 ns in the relative time calibration among PMTs is an adequate goal. On the other hand, physics considerations indicate that an absolute time calibration of σ ˜ 1ms is enough for all practical purposes. In this presentation the different sources of time uncertainties in the detector are briefly reviewed. The methods to reach the desired level of accuracy in the time calibration are shortly described emphasising the system based on optical beacons, i.e. well-controlled pulsed light sources.

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