July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Measurement of PTFE Reflectance for Xenon Scintillation Light

Jul 31, 2017, 6:15 PM
Reception Area (Fermi National Accelerator Laboratory)

Reception Area

Fermi National Accelerator Laboratory

Poster Dark Matter Poster Session and Reception


Yuhan Wang (University of Michigan)


The LUX-ZEPLIN (LZ) experiment is a next-generation direct detection experiment under construction to search for dark matter. The detector contains a dual-phase liquid xenon (LXe) time projection chamber with a total active mass of 7 tons and is located at the Sanford Underground Research Facility (SURF) in South Dakota. LZ takes advantage of the high VUV reflectivity of PTFE to achieve high light collection efficiency. Previous work has shown that thinner PTFE layers may reduce radiological backgrounds, and thus these are preferred so long as no significant loss in reflectance results. In this presentation, experimental results of the reflectance near wavelengths of 178 nm of thin PTFE, Kapton, and PEEK sheets immersed in LXe, conducted with the Michigan Xenon Detector (MiX), will be discussed.  It is further planned to compare those measurements with light propagation simulations to estimate the absolute reflectance of these materials.

Primary author

Yuhan Wang (University of Michigan)


Prof. Wolfgang Lorenzon (University of Michigan)

Presentation materials