Tetraphenyl-butadiene (TPB) is an organic fluorescent chemical compound generally used as wavelength shifter thanks to its extremely high efficiency to convert ultra-violet photons into visible light. A common method to use TPB with detectors sensitive to visible light, such as photomultiplier tubes (PMTs), is to deposit thin layers on the device window. To obtain effective TPB layers, different procedures can be used. In this work a specific evaporation technique adopted to coat 8 in convex windows photomultiplier tubes is presented. It consists in evaporating TPB by means of a Knudsen cell, which allows to strictly control the process, and in a rotating sample support, which guarantees the uniformity of the deposition. Simulation results and experimental tests demonstrate the effectiveness of this evaporation technique from the point of view of deposition uniformity and light conversion efficiency.

Bonesini, M., Cervi, T., Falcone, A., Kose, U., Mazza, R., Menegolli, A., et al. (2018). An innovative technique for TPB deposition on convex window photomultiplier tubes. JOURNAL OF INSTRUMENTATION, 13(12) [10.1088/1748-0221/13/12/P12020].

An innovative technique for TPB deposition on convex window photomultiplier tubes

Bonesini M.;Falcone A.;Spanu M.
;
Torti M.;
2018

Abstract

Tetraphenyl-butadiene (TPB) is an organic fluorescent chemical compound generally used as wavelength shifter thanks to its extremely high efficiency to convert ultra-violet photons into visible light. A common method to use TPB with detectors sensitive to visible light, such as photomultiplier tubes (PMTs), is to deposit thin layers on the device window. To obtain effective TPB layers, different procedures can be used. In this work a specific evaporation technique adopted to coat 8 in convex windows photomultiplier tubes is presented. It consists in evaporating TPB by means of a Knudsen cell, which allows to strictly control the process, and in a rotating sample support, which guarantees the uniformity of the deposition. Simulation results and experimental tests demonstrate the effectiveness of this evaporation technique from the point of view of deposition uniformity and light conversion efficiency.
Articolo in rivista - Articolo scientifico
Monochromators; Noble liquid detectors (scintillation, ionization, double-phase); Photon detectors for UV, visible and IR photons (vacuum) (photomultipliers, HPDs, others);
Monochromators; Noble liquid detectors (scintillation, ionization, double-phase); Photon detectors for UV, visible and IR photons (vacuum) (photomultipliers, HPDs, others)
English
2018
13
12
P12020
none
Bonesini, M., Cervi, T., Falcone, A., Kose, U., Mazza, R., Menegolli, A., et al. (2018). An innovative technique for TPB deposition on convex window photomultiplier tubes. JOURNAL OF INSTRUMENTATION, 13(12) [10.1088/1748-0221/13/12/P12020].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/287582
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