STRAW (STRings for Absorption length in Water): pathfinder for a neutrino telescope in the deep Pacific Ocean

Understand

We report about the design and the initial performances of the pathfinder mission for a possible large scale neutrino telescope named "STRings for Absorption length in Water" (STRAW).

• In June 2018 STRAW has been deployed at the Cascadia Basin site operated by Ocean Network Canada and has been collecting data since then.
• At a depth of about 2600 meters, the two STRAW 120 meters tall mooring lines are instrumented by three "Precision Optical Calibration Modules" (POCAM) and five Digital Optical Sensors (sDOM).
• We describe the instrumentation deployed and first light in the Pacific Ocean.