Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement

A. Knyazev; J. Park; P. Golubev; J. Cederkäll; H. Alvarez-Pol; J. Benlliure; P. Cabanelas; E. Casarejos; L. Causeret; D. Cortina-Gil; P. Díaz Fernández; M. Feijoo; D. Galaviz; E. Galiana; R. Gernhäuser; D. Gonzalez; A.-L. Hartig; A. Heinz; B. Heiss; H.T. Johansson; P. Klenze; T. Kröll; A. Perea; L. Ponnath; Z. Ren; H.-B. Rhee; J.L. Rodríguez-Sánchez; G. Rondeau; O. Tengblad; I.G. Scheblykin; P. Teubig; R. Timm

doi:10.1016/j.nima.2021.165302

Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement

A. Knyazev, J. Park, P. Golubev, J. Cederkäll, H. Alvarez-Pol, J. Benlliure, P. Cabanelas, E. Casarejos, L. Causeret, D. Cortina-Gil, P. Díaz Fernández, M. Feijoo, D. Galaviz, E. Galiana, R. Gernhäuser, D. Gonzalez, A.-L. Hartig, A. Heinz, B. Heiss, H.T. JohanssonP. Klenze, T. Kröll, A. Perea, L. Ponnath, Z. Ren, H.-B. Rhee, J.L. Rodríguez-Sánchez, G. Rondeau, O. Tengblad, I.G. Scheblykin, P. Teubig, R. Timm

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	165302
Number of pages	10
Journal	Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Volume	1003
DOIs	https://doi.org/10.1016/j.nima.2021.165302
Publication status	Published - 2021 Apr 1

Subject classification (UKÄ)

Subatomic Physics

Free keywords

Calorimeters
Scintillators
Absorption length
Surface topography
Simulation of light transport

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10.1016/j.nima.2021.165302Licence: CC BY

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Knyazev, A., Park, J., Golubev, P., Cederkäll, J., Alvarez-Pol, H., Benlliure, J., Cabanelas, P., Casarejos, E., Causeret, L., Cortina-Gil, D., Díaz Fernández, P., Feijoo, M., Galaviz, D., Galiana, E., Gernhäuser, R., Gonzalez, D., Hartig, A.-L., Heinz, A., Heiss, B., ... Timm, R. (2021). Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement. Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 1003, Article 165302. https://doi.org/10.1016/j.nima.2021.165302

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title = "Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement",

abstract = "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.",

keywords = "Calorimeters, Scintillators, Absorption length, Surface topography, Simulation of light transport",

author = "A. Knyazev and J. Park and P. Golubev and J. Cederk{\"a}ll and H. Alvarez-Pol and J. Benlliure and P. Cabanelas and E. Casarejos and L. Causeret and D. Cortina-Gil and \{D{\'i}az Fern{\'a}ndez\}, P. and M. Feijoo and D. Galaviz and E. Galiana and R. Gernh{\"a}user and D. Gonzalez and A.-L. Hartig and A. Heinz and B. Heiss and H.T. Johansson and P. Klenze and T. Kr{\"o}ll and A. Perea and L. Ponnath and Z. Ren and H.-B. Rhee and J.L. Rodr{\'i}guez-S{\'a}nchez and G. Rondeau and O. Tengblad and I.G. Scheblykin and P. Teubig and R. Timm",

year = "2021",

month = apr,

day = "1",

doi = "10.1016/j.nima.2021.165302",

language = "English",

volume = "1003",

journal = "Nuclear Instruments \& Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",

issn = "0168-9002",

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Knyazev, A, Park, J, Golubev, P , Cederkäll, J, Alvarez-Pol, H, Benlliure, J, Cabanelas, P, Casarejos, E, Causeret, L, Cortina-Gil, D, Díaz Fernández, P, Feijoo, M, Galaviz, D, Galiana, E, Gernhäuser, R, Gonzalez, D, Hartig, A-L, Heinz, A, Heiss, B, Johansson, HT, Klenze, P, Kröll, T, Perea, A, Ponnath, L, Ren, Z, Rhee, H-B, Rodríguez-Sánchez, JL, Rondeau, G, Tengblad, O, Scheblykin, IG, Teubig, P & Timm, R 2021, 'Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement', Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, vol. 1003, 165302. https://doi.org/10.1016/j.nima.2021.165302

Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement. / Knyazev, A.; Park, J.; Golubev, P. et al.
In: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, Vol. 1003, 165302, 01.04.2021.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement

AU - Knyazev, A.

AU - Park, J.

AU - Golubev, P.

AU - Cederkäll, J.

AU - Alvarez-Pol, H.

AU - Benlliure, J.

AU - Cabanelas, P.

AU - Casarejos, E.

AU - Causeret, L.

AU - Cortina-Gil, D.

AU - Díaz Fernández, P.

AU - Feijoo, M.

AU - Galaviz, D.

AU - Galiana, E.

AU - Gernhäuser, R.

AU - Gonzalez, D.

AU - Hartig, A.-L.

AU - Heinz, A.

AU - Heiss, B.

AU - Johansson, H.T.

AU - Klenze, P.

AU - Kröll, T.

AU - Perea, A.

AU - Ponnath, L.

AU - Ren, Z.

AU - Rhee, H.-B.

AU - Rodríguez-Sánchez, J.L.

AU - Rondeau, G.

AU - Tengblad, O.

AU - Scheblykin, I.G.

AU - Teubig, P.

AU - Timm, R.

PY - 2021/4/1

Y1 - 2021/4/1

N2 - 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.

AB - 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.

KW - Calorimeters

KW - Scintillators

KW - Absorption length

KW - Surface topography

KW - Simulation of light transport

UR - https://www.scopus.com/pages/publications/85103973727

U2 - 10.1016/j.nima.2021.165302

DO - 10.1016/j.nima.2021.165302

M3 - Article

SN - 0168-9002

VL - 1003

JO - Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

JF - Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

M1 - 165302

ER -

Knyazev A, Park J, Golubev P , Cederkäll J, Alvarez-Pol H, Benlliure J et al. Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement. Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2021 Apr 1;1003:165302. doi: 10.1016/j.nima.2021.165302

Simulations of light collection in long tapered CsI(Tl) scintillators using real crystal surface data and comparisons to measurement

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Reactions with radioactive beams and development of scintillator-based detector systems

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