Dresden 2013 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 90: Neutrinoastronomie 5

T 90.5: Vortrag

Donnerstag, 7. März 2013, 17:45–18:00, HSZ-E03

HitSpooling - An Improvement to IceCube's Supernova DAQ System — •David Heereman and Kael Hanson — IIHE ULB-VUB Brussels

The IceCube Neutrino Observatory is situated at the geographic South Pole. A lattice of 5160 photomultiplier tubes monitors one cubic kilometer of deep Antarctic ice in order to detect neutrinos via the Cherenkov photons emitted by charged secondaries from their interactions in matter. IceCube was designed to detect energies greater than 100 GeV. Due to subfreezing ice temperatures, the photomultipliers' dark noise rates are particularly low. Therefore IceCube can also search for neutrinos from galactic supernovae by detecting bursts of MeV neutrinos emitted during the core collapse and for several seconds following. Observing a collective rise in all photomultiplier rates on top of the dark noise is the basic principle for the supernova data aquisition system of IceCube. A new feature to the standard DAQ, called HitSpooling, will be presented in this talk. By buffering the full raw data stream of the photomultipliers and reading out time windows around triggers generated by the online supernova trigger we will gain as much information as possible in case of a supernova. Furthermore, HitSpooling is a powerful data source for studying and understanding the noise behavior of the detector as well as background processes coming from atmospheric muons. We'll present the idea of HitSpooling, the developed interface between the two IceCube data streams and present first studies done with the HitSpool data.