Author:
Steiger H.Th.J.,Theisen E.,Oberauer L.,Pilarczyk O.,Wurm M.
Abstract
Abstract
Neutrino experiments often use large volumes of water, organic scintillators or noble
liquids as active detection material. Due to the large hydrostatic and buoyancy forces involved,
precise knowledge of the liquid levels inside the detector tank are mandatory. Here we present the
main characteristics of the TruSense S310 Laser Range System. Level measurements can be performed
without direct contact to the liquid and through a gas-proof acrylic window, thus preserving the
strict radiopurity and chemical requirements of the target liquid. We report the results of a suit
of laboratory experiments for short-term precision tests (±5 mm) and long-term stability
studies. Moreover, we demonstrate that the infrared laser can be used while standard bi-alkali
PMTs are operational. We discuss the mechanical layout and integration of the system in the OSIRIS
pre-detector that will monitor the radiopurity of the liquid scintillator for the large-volume
neutrino experiment JUNO.
Subject
Mathematical Physics,Instrumentation