Speaker
Prof.
Stephanie Wissel
(Cal Poly)
Description
In-ice radio arrays are optimized for detecting the highest energy, cosmogenic neutrinos, expected to be produced though cosmic ray interactions with background photons. However, there are two expected populations of high energy neutrinos: the astrophysical flux observed by IceCube (\~1 PeV) and the cosmogenic flux (\~10$^{18}$ eV or 1000 PeV). Typical radio arrays employ a noise-riding trigger, which limits their minimum energy threshold based on the background noise temperature of the ice. Phased radio arrays could lower the energy threshold by combining the signals from several channels before triggering, thereby improving the signal-to-noise at the trigger level. Reducing the energy threshold would allow radio experiments to more efficiently overlap with optical Cherenkov neutrino telescopes as well as more efficient searches for cosmogenic neutrinos. I will discuss the proposed technique and prototypical phased arrays deployed both at Greenland’s Summit Station and in an anechoic chamber.
Author
Prof.
Stephanie Wissel
(Cal Poly)
