Abstract
The IceCube detector, located at the Amundsen-Scott South Pole station, is the largest neutrino detector ever constructed. It currently consists of 40 of the planned 80 strings -each instrumented with 60 optical modules between 1500 and 2500 metres depth in the clear Antarctic ice. One of the key searches is for a diffuse flux of high energy extraterrestrial neutrinos, in excess of that observed from cosmic-ray induced atmospheric neutrinos. To date, the best constraints on a diffuse flux come from IceCube's predecessor, AMANDA (Antarctic Muon And Neutrino Detector Array). The current focus is on analysis of the 2007 IceCube 22 string data, which will exceed the sensitivity of the integrated AMANDA exposure. Here we review the methodology and discuss the progress and status of the 22 string analysis.
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