Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 112: Experimentelle Techniken der Astroteilchenphysik II

T 112.9: Vortrag

Dienstag, 16. März 2010, 18:50–19:05, HG ÜR 1

Study of laser induced thermo-acoustic signals in a large ice volume — •Martin Bissok, Karim Laihem, Thomas Meures, Larissa Paul, Christopher Wiebusch, and Simon Zierke — III. Physikalisches Institut, RWTH Aachen, D-52056 Aachen

A goal for next generation neutrino-telescopes is the exploration of the extremely high energy region (EeV). Expected neutrino event rates in this energy range are low (<1 event/km3/year) and therefore a detector volume which is increased by more than one order of magnitude compared to IceCube is desireable. A possible approach to achieve such an increase in a cost-effective way is the acoustic detection of neutrinos, based on the principle of thermoacoustic signal generation in neutrino-induced hadronic cascades.

The Aachen Acoustic Laboratory (AAL) provides the means to study the thermoacoustic effect in a controlled environment. It consists of a large water-filled tank inside a cooling container. The freezing process is controlled and a large volume of bubble-free clear ice(∼ 3m3) is produced. Thermoacoustic signals are generated by a pulsed Nd:YAG laser with an energy of up to 55mJ/pulse. The acoustic signals are recorded by an array of 19 piezo-based sensors embedded in the ice. In this talk we give a description of this test experiment and present results from an initial freezing period.

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