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 165302

Construction 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

More information

Latest update

6/10/2021