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T: Fachverband Teilchenphysik

T 11: Neutrino-Astronomie I

T 11.1: Vortrag

Montag, 25. März 2019, 16:00–16:15, S10

STRAW: strings for absorption length in water — •Andreas Gärtner for the STRAW collaboration — Technische Universität München

Neutrino astronomy uses large volume detectors to search for astrophysical neutrinos. Detectors such as IceCube at the Geographic South Pole and the Gigaton Volume Detector (GVD) at Lake Baikal instrument up to a cubic kilometer of water or ice for measuring Cherenkov radiation created in neutrino-matter interactions. In the past the utilization of the clear water of the deep sea as Cherenkov medium has had severe difficulties in deploying and maintaining the offshore infrastructure.

Ocean Networks Canada (ONC), an initiative of the University of Victoria, has been creating and maintaining a deep sea infrastructure for scientific instruments off the coast of Canada. One of their network nodes, located on the Pacific abyssal plain of Cascadia Basin, could be an ideal site for a future neutrino telescope.

The Strings for Absorption Length in Water (STRAW) were developed at the Technical University of Munich (TUM) in collaboration with ONC and the University of Alberta. Two strings with optical modules have been deployed at Cascadia Basin in order to measure the optical properties of the water and study the feasibility of a larger installation. We will give a brief overview of the STRAW setup and present first results on the absorption length and background radiation at Cascadia Basin.