Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement
| Autor: | B. Heiss, D. González, Rainer Timm, G. Rondeau, Håkan T Johansson, P. Cabanelas, Pavel Golubev, R. Gernhäuser, Andreas Martin Heinz, Ángel Perea, Enrique Casarejos, P. Díaz Fernández, T. Kröll, M. Feijoo, E. Galiana, Z. Ren, H. Alvarez-Pol, Olof Tengblad, L. Ponnath, H. B. Rhee, P. Teubig, A.-L. Hartig, Joakim Cederkäll, P. Klenze, Daniel Galaviz, J. Benlliure, A. Knyazev, J. L. Rodriguez-Sanchez, L. Causeret, Ivan G. Scheblykin, D. Cortina-Gil, Joochun Park |
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| Přispěvatelé: | Swedish Research Council, Federal Ministry of Education and Research (Germany), Technische Universität Darmstadt, Helmholtz International Center for FAIR, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Xunta de Galicia |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Photon 3313 Tecnología E Ingeniería Mecánicas Physics::Optics Scintillator 01 natural sciences 030218 nuclear medicine & medical imaging Surface topography Crystal 03 medical and health sciences Calorimeters 0302 clinical medicine Optics 0103 physical sciences Specular reflection Instrumentation Physics Scintillation 2209.11 Luz Interaction point 010308 nuclear & particles physics business.industry Scattering Attenuation length 3312 Tecnología de Materiales ddc Scintillators Absorption length business Simulation of light transport |
| Zdroj: | Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 10 pags., 9 figs., 2 tabs. Simulation results for light transport in long tapered CsI(Tl) crystals using look-up tables (LUTs) are presented. The LUTs were derived from the topography of a polished and a lapped surface of a CsI(Tl) crystal measured with atomic force microscopy. Simulations with different combinations of polished and lapped surfaces were performed, to extract the non-uniformity of light collection depending on the interaction point, and compared to experimental results. The simulations reproduce the general trend given by the measurements, and show that more homogeneous light collection is attained when all lateral sides of the crystal are lapped. For the lapped crystal the simulation model is most sensitive to the reflectivity of the enhanced specular reflector (ESR) foil surrounding the crystal, which is one of several properties influencing the light transport examined in this study. The sensitivity of the light-output non-uniformity to variations in the absorption length observed in a batch of CsI(Tl) crystals in a previous study is also discussed. Residual differences between the simulation and the measurements can potentially be attributed to the scattering of scintillation photons inside the materials used. Additional measurements to further advance the construction of the simulation model are suggested. This work was supported by the Swedish research council (VR) grants 2017-03986, 2014-06644, 2013-04178, 2012-04550, BMBF contracts 05P15WOFNA, 05P19WOFN1, 05P15RDFN1, 05P19RDFN1, the TU Darmstadt – GSI cooperation contract HIC for FAIR, by the Spanish research council grants FPA02015-64969-P (MINDECO/FEDER/EU), FPA2015-69640-C2-1-P, PGC2018-099746-B-C21, MDM-2016.0692 (MINECO/FEDER/EU) and by ED431C-2017/54 and EDB481-2017/002 (Xunta de Galicia/FEDER/EU). |
| Databáze: | OpenAIRE |
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