Papers › STRAW-b (STRings for Absorption length in Water-b): the second pathfinder mission for...
STRAW-b (STRings for Absorption length in Water-b): the second pathfinder mission for the Pacific Ocean Neutrino Experiment
Kilian Holzapfel, Christian Spannfellner, Omid Aghaei, Andrew Baron, Jeanette Bedard, Michael Böhmer, Jeff Bosma, Nathan Deis, Christopher Fink, Christian Fruck, Andreas Gärtner, Roman Gernhäuser, Felix Henningsen, Ryan Hotte, Reyna Jenkyns, Martina Karl, Natasha Khera, Nikhita Khera, Ian Kulin, Alex Lam, Tim Lavallee, Klaus Leismüller, Laszlo Papp, Benoit Pirenne, Emily Price, Tom Qiu, Immacolata Carmen Rea, Elisa Resconi, Adrian Round, Carsten Rott, Albert Ruskey, Li Ruohan, Keita Sasaki, Matt Tradewell, Michael Traxler, Daniele Vivolo, Seann Wagner, Eva Laura Winter, Martin Wolf
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Since 2018, the potential for a high-energy neutrino telescope, named the Pacific Ocean Neutrino Experiment (P-ONE), has been thoroughly examined by two pathfinder missions, STRAW and STRAW-b, short for short for Strings for Absorption Length in Water. The P-ONE project seeks to install a neutrino detector with a one cubic kilometer volume in the Cascadia Basin's deep marine surroundings, situated near the western shores of Vancouver Island, Canada. To assess the environmental conditions and feasibility of constructing a neutrino detector of that scale, the pathfinder missions, STRAW and STRAW-b, have been deployed at a depth of 2.7 km within the designated site for P-ONE and were connected to the NEPTUNE observatory, operated by Ocean Networks Canada (ONC). While STRAW focused on analyzing the optical properties of water in the Cascadia Basin, \ac{strawb} employed cameras and spectrometers to investigate the characteristics of bioluminescence in the deep-sea environment. This report introduces the STRAW-b concept, covering its scientific objectives and the instrumentation used. Furthermore, it discusses the design considerations implemented to guarantee a secure and dependable deployment process of STRAW-b. Additionally, it showcases the data collected by battery-powered loggers, which monitored the mechanical stress on the equipment throughout the deployment. The report also offers an overview of STRAW-b's operation, with a specific emphasis on the notable advancements achieved in the data acquisition (DAQ) system and its successful integration with the server infrastructure of ONC.
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