Stability of tetraphenyl butadiene thin films in liquid xenon

Sanguino, P.; Balau, F.; Rego, A.M. Botelho do; Pereira, A.; Chepel, V.

doi:10.1016/j.tsf.2016.01.006

Cited by 11 publications

(11 citation statements)

References 19 publications

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“…It has been found that in liquid xenon after 20 h of immersion, the surface density of evaporated TPB films decreased by 1.6 µg/cm 2 , although without any morphologic or chemical surface changes detected with SEM micrographs or XPS. This can be interpreted as a slow dissolution process where the TPB molecules remain intact [94]. Recently, a similar phenomenon, although significantly slower than in xenon, has been observed in LAr [95].…”

Section: Tpbmentioning

confidence: 53%

Wavelength Shifters for Applications in Liquid Argon Detectors

Kuźniak

Szelc

2020

Instruments

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Wavelength shifters and their applications for liquid argon detectors have been a subject of extensive R&D procedures over the past decade. This work reviews the most recent results in this field. We compare the optical properties and usage details together with the associated challenges for various wavelength shifting solutions. We discuss the current status and potential future R&D directions for the main classes of wavelength shifters.

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Section: Tpbmentioning

confidence: 53%

Wavelength Shifters for Applications in Liquid Argon Detectors

Kuźniak

Szelc

2020

Instruments

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“…PEN could mitigate the TPB emanation in LAr[36] and find use in liquid Xe detectors, where TPB coatings dissolve[37]. 2 PEN laminated with inactive polymer (e.g.…”

mentioning

confidence: 99%

Polyethylene naphthalate film as a wavelength shifter in liquid argon detectors

et al. 2019

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Liquid argon-based scintillation detectors are important for dark matter searches and neutrino physics. Argon scintillation light is in the vacuum ultraviolet region, making it hard to be detected by conventional means. Polyethylene naphthalate (PEN), an optically transparent thermoplastic polyester commercially available as large area sheets or rolls, is proposed as an alternative wavelength shifter to the commonly-used tetraphenyl butadiene (TPB). By combining the existing literature data and spectrometer measurements relative to TPB, we conclude that the fluorescence yield and timing of both materials may be very close. The evidence collected suggests that PEN is a suitable replacement for TPB in liquid argon neutrino detectors, and is also a promising candidate for dark matter detectors. Advantages of PEN are discussed in the context of scaling-up existing technologies to the next generation of very large ktonne-scale detectors. Its simplicity has a potential to facilitate such scale-ups, revolutionizing the field.

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“…A primary goal is to establish whether TPB remains solidly affixed to coating surfaces, or rather may become dissolved or suspended in the argon bulk, for several commonly used types of coating in neutrino detectors. Previous work has established that TPB coatings are unstable, and perhaps partially soluble, in liquid xenon [19]. If this phenomenon were similarly exhibited in liquid argon, it could have significant implications for present and future neutrino and dark matter experiments.…”

Section: Tetraphenyl Butadiene Coatings In Liquid Argon Tpc Experimentsmentioning

confidence: 92%

Emanation and bulk fluorescence in liquid argon from tetraphenyl butadiene wavelength shifting coatings

et al. 2019

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A:We study the stability of three types of popularly employed TPB coatings under immersion in liquid argon. TPB emanation from each coating is quantified by fluorescence assay of molecular sieve filter material after a prolonged soak time. Two of the coatings are shown to emanate a detectable concentration of TPB into argon over a 24 hour period, which corresponds to tens of parts per billion in argon by mass. In an independent setup, the dissolved or suspended TPB is shown to produce a wavelength shifting effect in the argon bulk. Interpretations of these results and implications for present and future liquid argon time projection chamber experiments are discussed.

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Stability of tetraphenyl butadiene thin films in liquid xenon

Cited by 11 publications

References 19 publications

Wavelength Shifters for Applications in Liquid Argon Detectors

Wavelength Shifters for Applications in Liquid Argon Detectors

Polyethylene naphthalate film as a wavelength shifter in liquid argon detectors

Emanation and bulk fluorescence in liquid argon from tetraphenyl butadiene wavelength shifting coatings

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