| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8173563 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2015 | 8 Pages |
Abstract
Wavelength-shifting (WLS) films were applied on UV-extended front windows of multianode photomultiplier tubes (MAPMTs) in order to increase the sensitivity of the MAPMTs at shorter wavelengths. The WLS material contained p-Terphenyl as photoactive component, which absorbs shorter wavelength photons (<300nm) and re-emits fluorescence photons around 350 nm, i.e., at the maximum of the PMTs׳ sensitivity. The films were applied by means of dip-coating and the film performance was studied with respect to quantum efficiency, film homogeneity, and crosstalk on the MAPMTs. Using WLS-film-covered MAPMTs in a gaseous Ring Imaging Cherenkov detector, the number of detected photoelectrons per ring increased by up to 21% in an in-beam test.
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Authors
J. Adamczewski-Musch, K.-H. Becker, S. Belogurov, N. Boldyreva, A. Chernogorov, C. Deveaux, V. Dobyrn, M. Dürr, J. Eom, J. Eschke, C. Höhne, K.-H. Kampert, V. Kleipa, L. Kochenda, B. Kolb, J. Kopfer, P. Kravtsov, S. Lebedev, I.-K. Yoo,