@article{297d058636f247a9847d7d6c55c6bf8c,
title = "Direct comparison of PEN and TPB wavelength shifters in a liquid argon detector",
abstract = "A large number of particle detectors employ liquid argon as their target material owing to its high scintillation yield and its ability to drift ionization charge over large distances. Scintillation light from argon is peaked at 128 nm and a wavelength shifter is required for its efficient detection. In this work, we directly compare the light yield achieved in two identical liquid argon chambers, one of which is equipped with polyethylene naphthalate (PEN) and the other with tetraphenyl butadiene (TPB) wavelength shifter. Both chambers are lined with enhanced specular reflectors and instrumented with SiPMs with a coverage fraction of approximately 1%, which represents a geometry comparable to the future large scale detectors. We measured the light yield of the PEN chamber to be 39.4±0.4(stat)±1.9(syst)% of the yield of the TPB chamber. Using a Monte Carlo simulation this result is used to extract the wavelength shifting efficiency of PEN relative to TPB equal to 47.2±5.7%. This result paves the way for the use of easily available PEN foils as a wavelength shifter, which can substantially simplify the construction of future liquid argon detectors.",
author = "Boulay, {M. G.} and V. Camillo and N. Canci and S. Choudhary and L. Consiglio and A. Flammini and C. Galbiati and C. Ghiano and A. Gola and S. Horikawa and P. Kachru and I. Kochanek and K. Kondo and G. Korga and M. Ku{\'z}niak and M. Ku{\'z}wa and A. Leonhardt and T. {\L}{\c e}cki and A. Mazzi and A. Moharana and G. Nieradka and G. Paternoster and Pollmann, {T. R.} and A. Razeto and D. Sablone and T. Sworobowicz and Szelc, {A. M.} and C. T{\"u}rkoğlu and H. Wang",
note = "Funding Information: This work was supported from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under grant agreement No 962480 (DarkWave project). The 2PAC detector construction was carried out with the use of CEZAMAT (Warsaw) cleanroom infrastructures financed by the European Regional Development Fund; we are grateful to Maciej Trzaskowski of CEZAMAT for support. We are grateful to Prof. Magdalena Skompska for access to the spectrophotometer, which was purchased by CNBCh (University of Warsaw) from the project co-financed by EU from the European Regional Development Fund. We acknowledge support from the Istituto Nazionale di Fisica Nucleare (Italy) and Laboratori Nazionali del Gran Sasso (Italy) of INFN, from NSF (US, Grant PHY-1314507 for Princeton University), from the Royal Society UK and the Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation, and from the International Research Agenda Programme AstroCeNT (MAB/2018/7) funded by the Foundation for Polish Science (FNP) from the European Regional Development Fund. Fruitful discussions with Gemma Testera are gratefully acknowledged. Publisher Copyright: {\textcopyright} 2021, The Author(s).",
year = "2021",
month = dec,
doi = "10.1140/epjc/s10052-021-09870-7",
language = "English (US)",
volume = "81",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer New York",
number = "12",
}