Dortmund 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 72: Experimental techniques in astroparticle physics III
T 72.5: Vortrag
Mittwoch, 17. März 2021, 17:00–17:15, Tv
Transmission of VUV light through PTFE — •Lutz Althueser1, Sebastian Lindemann2, Michael Murra1, Marc Schumann2, Christian Wittweg1, and Christian Weinheimer1 — 1Institut für Kernphysik, WWU Münster, Germany — 2Physikalisches Institut, Universität Freiburg, Germany
Polytetrafluoroethylene (PTFE, Teflon™) is commonly used in liquid xenon (LXe) based detectors to optimize the xenon scintillation light collection and to reduce the radioactive background rate from detector materials. The active LXe volume of such detectors is encapsulated in PTFE due to its high reflectance for VUV LXe scintillation light with peak emission at 178 nm. The thickness of these PTFE detector components specifies the reflectance, transmission and material radioactivity introduced into the detector.
The talk will present VUV transmission measurements for PTFE samples of various thicknesses in vacuum as well as in gaseous xenon using collimated light at a wavelength of 178 nm [1]. The Kubelka and Munk model will be introduced and applied to describe the light transmission over the full range of PTFE thicknesses.
The work of the author is supported by DFG through the Research Training Group "GRK 2149: Strong and Weak Interactions - from Hadrons to Dark Matter", by BMBF under contract 05A20PM1 and by ERC grant No. 724320 (ULTIMATE).
[1] L. Althueser et al., JINST 15 (2020) P12021