A thin film of Tetraphenyl-butadiene (TPB) deposited onto the surface delimiting the active volume of the detector and/or onto the photosensor’s optical window is the most common solution to down convert argon VUV scintillation light in current and planned liquid argon based experiments for dark matter searches and neutrino physics. Characterization of the main features of TPB coatings on different, commonly used substrates is reported, as a result of measurements at the specialized optical metrology labs of ENEA and University of Tor Vergata. Measured features include TPB emission spectra with lineshape and relative intensity variation recorded as a function of the film thickness and for the first time down to LAr temperature, as well as optical reflectance and transmittance spectra of the TPB coated substrates in the wavelength range of the TPB emission.

Francini, R., Montereali, R., Nichelatti, E., Vincenti, M., Canci, N., Segreto, E., et al. (2013). Tetraphenyl-butadiene films: VUV-Vis optical characterization from room to liquid argon temperature. ??????? it.cilea.surplus.oa.citation.tipologie.CitationProceedings.prensentedAt ??????? LIDINE [10.1088/1748-0221/8/09/C09010].

Tetraphenyl-butadiene films: VUV-Vis optical characterization from room to liquid argon temperature

FRANCINI, ROBERTO;
2013-09-23

Abstract

A thin film of Tetraphenyl-butadiene (TPB) deposited onto the surface delimiting the active volume of the detector and/or onto the photosensor’s optical window is the most common solution to down convert argon VUV scintillation light in current and planned liquid argon based experiments for dark matter searches and neutrino physics. Characterization of the main features of TPB coatings on different, commonly used substrates is reported, as a result of measurements at the specialized optical metrology labs of ENEA and University of Tor Vergata. Measured features include TPB emission spectra with lineshape and relative intensity variation recorded as a function of the film thickness and for the first time down to LAr temperature, as well as optical reflectance and transmittance spectra of the TPB coated substrates in the wavelength range of the TPB emission.
LIDINE
Rilevanza internazionale
contributo
Settore FIS/03 - Fisica della Materia
English
Spectral responses; Noble liquid detectors (scintillation, ionization, double-phase); Photoemission; Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
http://dx.medra.org/10.1088/1748-0221/8/09/C09010
Intervento a convegno
Francini, R., Montereali, R., Nichelatti, E., Vincenti, M., Canci, N., Segreto, E., et al. (2013). Tetraphenyl-butadiene films: VUV-Vis optical characterization from room to liquid argon temperature. ??????? it.cilea.surplus.oa.citation.tipologie.CitationProceedings.prensentedAt ??????? LIDINE [10.1088/1748-0221/8/09/C09010].
Francini, R; Montereali, R; Nichelatti, E; Vincenti, M; Canci, N; Segreto, E; Cavanna, F; Di Pompeo, F; Carbonara, F; Fiorillo, G; Perfetto, F
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/129627
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