Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement
Artikel i vetenskaplig tidskrift, 2021
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.
Absorption length
Scintillators
Simulation of light transport
Calorimeters
Surface topography
Författare
A. Knyazev
Lunds universitet
J. Park
Lunds universitet
Institute for Basic Science - Korea (IBS)
P. Golubev
Lunds universitet
J. Cederkall
Lunds universitet
H. Alvarez-Pol
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
P. Cabanelas
Universidade de Santiagode Compostela
E. Casarejos
Universidad de Vigo
L. Causeret
Lunds universitet
D. Cortina-Gil
Universidade de Santiagode Compostela
Paloma Diaz Fernandez
Chalmers, Fysik, Subatomär fysik och plasmafysik
M. Feijoo
Universidade de Santiagode Compostela
D. Galaviz
Laboratório de Instrumentação e Física Experimental de Partículas
E. Galiana
Laboratório de Instrumentação e Física Experimental de Partículas
R. Gernhaeuser
Technische Universität München
D. Gonzalez
Universidade de Santiagode Compostela
A. -L. Hartig
Technische Universität Darmstadt
Andreas Martin Heinz
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
B. Heiss
Technische Universität München
Håkan T Johansson
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
P. Klenze
Technische Universität München
T. Kroell
Technische Universität Darmstadt
A. Perea
Consejo Superior de Investigaciones Científicas (CSIC)
L. Ponnath
Technische Universität München
Z. Ren
Lunds universitet
H. -B. Rhee
Technische Universität Darmstadt
J. L. Rodriguez-Sanchez
Universidade de Santiagode Compostela
G. Rondeau
Lunds universitet
O. Tengblad
Consejo Superior de Investigaciones Científicas (CSIC)
I. G. Scheblykin
Lunds universitet
P. Teubig
Laboratório de Instrumentação e Física Experimental de Partículas
R. Timm
Lunds universitet
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
0168-9002 (ISSN)
Vol. 1003 165302Uppbyggnad av experiment vid FAIR-NUSTAR
Vetenskapsrådet (VR) (2014-06644), 2016-01-01 -- 2018-12-31.
Ämneskategorier
Fysikalisk kemi
Atom- och molekylfysik och optik
Annan fysik
DOI
10.1016/j.nima.2021.165302