Wednesday 5 March 2008 Speaker: Amy Connolly (UCL) Title: Closing in on Ultra-High Energy Neutrinos with the Radio Detection Abstract: No diffuse cosmic neutrino flux has yet been observed, but the highest energy cosmic rays imply an associated flux of neutrinos. These neutrinos, with energies that exceed 10^18 eV, will point back to their source, are nearly unattenuated over cosmic distances, and in any detection medium, will induce interactions at center-of-mass energies beyond those seen at any accelerator on earth. I will describe current and future experiments that seek ultra-high energy cosmic neutrinos, which are so evasive they require detection volumes beyond 100's of km^3. Volumes of such size are achievable using the radio Cerenkov technique, and I will discuss current and future projects that utilize this detection method, including the ANITA balloon experiment which just completed its first full physics flight this year.