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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:10 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
Radio technique for investigating high energy cosmic neutrinos
Authors:
Alina Mihaela Badescu (1), Alexandra Saftoiu (2), Octavian Fratu (1), Iliana Brancus (2), Bogdan Mitrica (2), Octavian Sima (3), Simona Viorica Halunga (1), Gabriel Toma (2), Ionel Lazanu (3)
Affiliation:
(1) Universitatea Politehnica Bucuresti
(2) Institutul de Fizica si Inginerie Nucleara-Horia Hulubei
(3) Universitatea Bucuresti
E-mail
badescuam@yahoo.com
Keywords:
Cherenkov, radio detection , high energy neutrino
Abstract:
As stable neutral particles, UHE cosmic neutrinos can reach ground level detectors directly from their source, (undeflected by intervening magnetic fields), providing information about stars and galaxies. LAGUNA FP7 project is investigating the possibility to build large-scale neutrino telescope for detecting UHE cosmic neutrinos, which on their propagation to the earth are interacting with interstellar gas, and extragalactic neutrinos. We consider an alternative detection strategy based on coherent radio Cherenkov emission from neutrino-induced electromagnetic showers. The radio power emitted coherently scales inversely with the radiation length of the medium squared and goes like the primary shower energy squared. Electromagnetic cascade evolution produces a coherent Cherenkov pulse at radio frequencies. This pulse is a ring-shaped structure that propagates along the surface of a cone defined by the Cherenkov angle for the medium. We investigate the performances of a radio Cherenkov neutrino detector in natural salt. We present the basic structure of the detector and we analyze the characteristics of the radio signal on its propagation from the site of the shower to a point where it intersects the antenna. We also study how the pulse couples to a realistic receiver. The behavior of the key instrument -radio antenna- is characterized and signal-to-noise ratio limiting situations are also presented.
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