Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 17: Neutrino Astronomy I

T 17.4: Vortrag

Montag, 15. März 2021, 16:50–17:05, Tq

The Pacific Ocean Neutrino Experiment: site qualification — •Immacolata Carmen Rea and Christian Fruck — TUM Physics Department, Munich, Germany

The Pacific Ocean Neutrino Experiment (P-ONE) is a collaboration of Ocean Networks Canada (ONC), the Technical University of Munich (TUM), Germany, and other US and Canadian universities, with the goal of building a large volume neutrino telescope at 2600 m depth in the Cascadia Basin site (a heavily sedimented abyssal plain region 300 km west from Vancouver Island in the northern Pacific Ocean). Two pathfinder experiments have already been deployed there: STRAW (STRings for Absorption length in Water) in 2018 and STRAW-b in 2020. The main purpose of both is the optical qualification of the site placing a special focus on the absorption and scattering length measure and on the light background, mainly caused by bioluminescence phenomena.

STRAW is composed by a two strings array equipped with pulsed light sources, 3 POCAMs (Precise Optical CAlibration Modules) that are also under development for IceCube upgrade, and with custom developed light sensors, 5 sDOMs (STRAW digital Optical Modules). With this setup the light attenuation has been probed on different baselines and background rates have been recorded in several sensors over almost 2 years. We present the preliminary results of this first pathfinder mission and discuss the implications for a future neutrino telescope at this site.