Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement
Journal article, 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
Author
A. Knyazev
Lund University
J. Park
Lund University
Institute for Basic Science - Korea (IBS)
P. Golubev
Lund University
J. Cederkall
Lund University
H. Alvarez-Pol
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
P. Cabanelas
Universidade de Santiagode Compostela
E. Casarejos
University of Vigo
L. Causeret
Lund University
D. Cortina-Gil
Universidade de Santiagode Compostela
Paloma Diaz Fernandez
Chalmers, Physics, Subatomic and Plasma Physics
M. Feijoo
Universidade de Santiagode Compostela
D. Galaviz
Laboratory of Instrumentation and Experimental Particle Physics
E. Galiana
Laboratory of Instrumentation and Experimental Particle Physics
R. Gernhaeuser
Technical University of Munich
D. Gonzalez
Universidade de Santiagode Compostela
A. -L. Hartig
Technische Universität Darmstadt
Andreas Martin Heinz
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
B. Heiss
Technical University of Munich
Håkan T Johansson
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
P. Klenze
Technical University of Munich
T. Kroell
Technische Universität Darmstadt
A. Perea
Spanish National Research Council (CSIC)
L. Ponnath
Technical University of Munich
Z. Ren
Lund University
H. -B. Rhee
Technische Universität Darmstadt
J. L. Rodriguez-Sanchez
Universidade de Santiagode Compostela
G. Rondeau
Lund University
O. Tengblad
Spanish National Research Council (CSIC)
I. G. Scheblykin
Lund University
P. Teubig
Laboratory of Instrumentation and Experimental Particle Physics
R. Timm
Lund University
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
0168-9002 (ISSN)
Vol. 1003 165302Construction of FAIR-NUSTAR experiments
Swedish Research Council (VR) (2014-06644), 2016-01-01 -- 2018-12-31.
Subject Categories
Physical Chemistry
Atom and Molecular Physics and Optics
Other Physics Topics
DOI
10.1016/j.nima.2021.165302