Abstract
The Antarctic Impulsive Transient Antenna (ANITA) is an experiment which has completed two long-duration balloon flights above Antarctica. ANITA searches for impulsive radio-Cherenkov emission arising from the Askaryan charge excess which develops in ultra-high energy neutrino-induced particle cascades in the Antarctic ice. Analysis of data from the first ANITA flight, which took place in 2006–2007, resulted in zero neutrino candidate events remaining after all cuts had been performed. Limits on the ultra-high energy neutrino flux from this analysis are presented. The sensitivity of the second flight, 2008–2009, and possible future flights to both ultra-high energy neutrino and ultra-high energy cosmic ray air shower signals are discussed.
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