The ARIANNA Hexagonal Radio Array - performance and prospects

• Published in: EPJ Web of Conferences
• Main Authors: Hallgren, Allan, ARIANNA Collaboration, The
• Format: Conference Object
• Language: English
• Published: Uppsala universitet, Högenergifysik 2016
• Subjects: Astronomy; Astrophysics and Cosmology; Astronomi; astrofysik och kosmologi; Ross Ice Shelf; Ice Shelf
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-311099; https://doi.org/10.1051/epjconf/201611603003

The origin of the highest energy cosmic rays at similar to 10(20) eV is still unknown. Ultra-high energy neutrinos from the GZK process should provide information on the sources and their properties. A promising and cost effective method for observing GZK-neutrinos is based on detection of Askaryan radio pulses with antennas installed in ice. The ARIANNA project aims at instrumenting a 36*36 km(2) large area on the Ross Ice Shelf with an array of radio detection stations. The deployment of a test system for ARIANNA, the Hexagonal Radio Array (HRA), was completed in December 2014. The three first stations were installed in 2012. Solar panels are used to drive the < 10W stations. The system hibernated at sunset in April and all stations returned to operation in September. The site is essentially free of anthropogenic noise. Simple cuts eliminate background and provides for efficient selection of neutrino events. Prospects for the sensitivity of the full ARIANNA array to the flux of GZK neutrinos are shown.