ARIANNA Experiment

{{Short description|Proposed detector for ultra-high energy astrophysical neutrinos}}

Antarctic Ross Ice-Shelf Antenna Neutrino Array (ARIANNA) is a proposed detector for ultra-high energy astrophysical neutrinos. It will detect coherent radio Cherenkov emissions from the particle showers produced by neutrinos with energies above about 10^17 eV. ARIANNA will be built on the Ross Ice Shelf just off the coast of Antarctica, where it will eventually cover about 900 km² in surface area. There, the ice-water interface below the shelf reflects radio waves, giving ARIANNA sensitivity to downward going neutrinos and improving its sensitivity to horizontally incident neutrinos. ARIANNA detector stations will each contain 4-8 antennas which search for brief pulses of 50 MHz to 1 GHz radio emission from neutrino interactions.{{Cite journal |arxiv = 1005.5193|last1 = Gerhardt|first1 = Lisa|title = A prototype station for ARIANNA: A detector for cosmic neutrinos|journal = Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|volume = 624|pages = 85–91|last2 = Klein|first2 = Spencer R|last3 = Stezelberger|first3 = Thorsten|last4 = Barwick|first4 = Steve|last5 = Dookayka|first5 = Kamlesh|last6 = Hanson|first6 = Jordan|last7 = Nichol|first7 = Ryan|year = 2010| issue=1 |doi = 10.1016/j.nima.2010.09.032|bibcode = 2010NIMPA.624...85G}}

As of 2016, a prototype array consisting of 7 stations had been deployed, and was taking data. An initial search for neutrinos was made; none were found, and an upper limit was generated.{{Cite journal |arxiv = 1410.7352|last1 = Gerhardt|first1 = Lisa|title = A First Search for Cosmogenic Neutrinos with the ARIANNA Hexagonal Radio Array |journal = Astroparticle Physics|volume = 70 |issue = 2015|pages = 12–26|last2 = Klein|first2 = Spencer R|last3 = Stezelberger|first3 = Thorsten|last4 = Barwick|first4 = Steve|last5 = Dookayka|first5 = Kamlesh|last6 = Hanson|first6 = Jordan|last7 = Nichol|first7 = Ryan|year = 2015|doi = 10.1016/j.astropartphys.2015.04.002|citeseerx = 10.1.1.743.4766|bibcode = 2015APh....70...12B}}