SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 71: Exp. Methods AP, PMTs

T 71.5: Vortrag

Mittwoch, 22. März 2023, 16:50–17:05, POT/0081

Characterizing Light Attenuation inside the Wavelength-Shifting Optical Module from Timing Distributions — •Yuriy Popovych, John Rack-Helleis, Martin Rongen, and Sebastian Böser — Johannes Gutenberg-Universität Mainz

The Wavelength Shifting Optical Module (WOM) makes use of wavelength-shifting paint to absorb UV-photons and re-emit them as visible light. These photons are captured via Total Internal Reflection inside a quartz tube and propagate to Photomultipliers at both ends. Due to its design the timing resolution of the WOM does not result not from the sensors, but from the photon propagation inside the tube. Further, one can measure the timing distribution to differentiate between scattering and absorption processes in the light propagation. Characterizing the timing lets us explore new use cases for the WOM-technology.

This talk will describe the modeling and measurement of the timing characteristics of the WOM and a method to deduce absorption and scattering properties of the wavelength-shifter coated WOM tube from it.