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Tetraphenyl Butadiene Emanation and Bulk Fluorescence from Wavelength Shifting Coatings in Liquid Argon

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arxiv 1804.00011 v3 pith:TKNQIPT7 submitted 2018-03-30 physics.ins-det

Tetraphenyl Butadiene Emanation and Bulk Fluorescence from Wavelength Shifting Coatings in Liquid Argon

J. Asaadi , B.J.P Jones , A. Tripathi , I. Parmaksiz , H. Sullivan , Z. G. R. Williams This is my paper
classification physics.ins-det
keywords argoncoatingsliquidbulkemanationfluorescenceshiftingtime
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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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