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 165302

Uppbyggnad 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

Mer information

Senast uppdaterat

2021-06-10