Use of poly(ethylene naphthalate) as a self-vetoing structural material

Efremenko, Y. V.; Fajt, L.; Febbraro, M.; Fischer, F.; Hayward, Chris; Hodák, R.; Kraetzschmar, T. M. G.; Majorovits, B.; Muenstermann, D.; Öz, E.; Pjatkan, R.; Pohl, M.; Radford, D. C.; Rouhana, R.; Sala, Elena; Schulz, O.; Štekl, I.; Stommel, Markus

doi:10.1088/1748-0221/14/07/p07006

Cited by 31 publications

(38 citation statements)

References 13 publications

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“…7). The attenuation length varies about 1 cm near the peak region (425-475 nm), as reported for injection moulded PEN tiles [22]; for the cross-check a constant 1 cm value was set in the simulation. Both results agree to 1%, and varying the absorption length by 1 cm changes the result approximately by the size of the overall systematic uncertainty.…”

Section: Simulationmentioning

confidence: 99%

Direct comparison of PEN and TPB wavelength shifters in a liquid argon detector

et al. 2021

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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$$\,\pm \,$$ ± 0.4(stat)$$\,\pm \,$$ ± 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$$\,\pm \,$$ ± 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.

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Section: Simulationmentioning

confidence: 99%

Direct comparison of PEN and TPB wavelength shifters in a liquid argon detector

et al. 2021

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“…Usage of PEN as self-vetoing structural material in the LEGEND experiment also has wavelength shifting properties with an efficiency of around 50% of commonly used TPB [3]. Recently it has been identified as a potential self-vetoing structural material in low background physics experiments [2,4].…”

Section: Pos(eps-hep2021)738mentioning

confidence: 99%

Usage of PEN as self-vetoing structural material in the LEGEND experiment

Velez¹

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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PEN is an industrial polyester plastic interesting for the physics community as a new type of wavelength shifting plastic scintillator. Recently, PEN structures with good radio-purity and attenuation length have been successfully produced using the injection molding technology. This opens the possibility for usage of PEN as optically active structural components in low-background experiments such as the LEGEND-200 experiment. In this contribution the ongoing R&D on PEN is outlined with focus on the evaluation of the optical properties of PEN.

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“…For the PEN base material, two visible light absorption lengths are considered, 1 cm and 5 cm, with the resulting central value and systematic uncertainty given for ε vis . The figure of merit, f , defined later in text, is also shown (central value only) plates has been recently established [30], using it as the bulk material for the amplification structure represents a natural choice. Therefore, several PEN-based tiles have been manufactured to optimize the design and decouple possible light production mechanisms, as shown in Table 1.…”

Section: Concept and Possible Configurationsmentioning

confidence: 99%

Development of very-thick transparent GEMs with wavelength-shifting capability for noble element TPCs

et al. 2021

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A new concept for the simultaneous detection of primary and secondary scintillation in time projection chambers is proposed. Its core element is a type of very-thick GEM structure supplied with transparent electrodes and machined from a polyethylene naphthalate plate, a natural wavelength shifter. Such a device has good prospects for scalability and, by virtue of its genuine optical properties, it can improve on the light collection efficiency, energy threshold and resolution of conventional micropattern gas detectors. This, together with the intrinsic radiopurity of its constituting elements, offers advantages for noble gas and liquid based time projection chambers, used for dark matter searches and neutrino experiments. Production, optical and electrical characterization, and first measurements performed with the new device are reported.

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Use of poly(ethylene naphthalate) as a self-vetoing structural material

Abstract: Contents 1 Introduction 2 Availability and radiopurity of PEN 3 Molding of PEN 4 Emission spectrum 5 Vacuum-UV (VUV) response for 126.8 nm LAr scintillation light detection 6 Light output comparison with mono-energetic electrons 7 Pulse-shape discrimination 8 Conclusions & outlook

Cited by 31 publications

References 13 publications

Direct comparison of PEN and TPB wavelength shifters in a liquid argon detector

Direct comparison of PEN and TPB wavelength shifters in a liquid argon detector

Usage of PEN as self-vetoing structural material in the LEGEND experiment

Development of very-thick transparent GEMs with wavelength-shifting capability for noble element TPCs

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