Tootfinder

I wasn't feeling well last night and I'm broke af, so I missed #AEWRevolution. I avoided Mastodon last night because spoilers. Time to try to find a cheap way to watch the VOD. :tpb: 🏴‍☠️😬
#ProWrestling

This https://arxiv.org/abs/2311.15901 has been replaced.
initial toot: https://mastoxiv.page/@ar…

A novel cryogenic VUV spectrofluorometer for the characterization of wavelength shifters
We present a novel cryogenic VUV spectrofluorometer designed for the characterization of wavelength shifters (WLS) crucial for experiments based on liquid argon (LAr) scintillation light detection. Wavelength shifters like 1,1,4,4-tetraphenyl-1,3-butadiene (TPB) or polyethylene naphthalate (PEN) are used in these experiments to shift the VUV scintillation light to the visible region. Precise knowledge of the optical properties of the WLS at liquid argon's temperature (87 K) and LAr scintillatio…

Development of wavelength-shifting PEN foils for next generation experiments
M. Ku\'zniak, S. Paw{\l}owski, A. Abramowicz, A. F. V. Cortez, M. Kumosi\'nski, T. {\L}\k{e}cki, G. Nieradka
https://arxiv.org/abs/2403.19350

Development of wavelength-shifting PEN foils for next generation experiments
Polyethylene naphthalate (PEN) foils have been demonstrated as a wavelength shifter suitable for operation in liquid argon. At the same time, wavelength shifting efficiency of technical grades of PEN, commercially available on the market, is lower than that of tetraphenyl butadiene (TPB). This paper reports on an R&D program focused on exploring the intrinsic limitations of PEN and optimizing it for the highest achievable wavelength shifting efficiency.