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Properties of the CsI(Tl) detector elements of the CALIFA detector

Knyazev, Alexander LU ; Park, Joochun LU ; Golubev, Pavel LU ; Cederkäll, Joakim LU ; Alvarez-Pol, H; Cabanelas, P.; Casarejos, Enrique; Causeret, L.; Cortina-Gil, D and Diaz Fernandez, P., et al. (2019) In Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment 940. p.393-404
Abstract
In the RB experiment at FAIR, charged particles with energies up to 600 MeV and forward boosted -rays with energies up to 20 MeV need to be detected in scattering experiments. Calorimeters for nuclear physics experiments of this kind, using relativistic radioactive ion beams, require high energy resolution and high efficiency for simultaneous detection of strongly Doppler shifted -rays and high-energy charged particles. A calorimeter design that can meet these requirements, using CsI(Tl) scintillators, results in detector elements that may exhibit light output variations with crystal depth, which can limit the attainable resolution. In this paper we present results from a systematic study of 478 detector modules of CALIFA, the RB... (More)
In the RB experiment at FAIR, charged particles with energies up to 600 MeV and forward boosted -rays with energies up to 20 MeV need to be detected in scattering experiments. Calorimeters for nuclear physics experiments of this kind, using relativistic radioactive ion beams, require high energy resolution and high efficiency for simultaneous detection of strongly Doppler shifted -rays and high-energy charged particles. A calorimeter design that can meet these requirements, using CsI(Tl) scintillators, results in detector elements that may exhibit light output variations with crystal depth, which can limit the attainable resolution. In this paper we present results from a systematic study of 478 detector modules of CALIFA, the RB calorimeter, in order to determine and minimize such variations. To facilitate further systematic studies we also present results for the total absorption length of the scintillation light, using spectrophotometry, light crosstalk between adjacent detector modules, and surface topography of the CsI(Tl) crystals from atomic force microscopy. (Less)
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Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
volume
940
pages
393 - 404
publisher
Elsevier
external identifiers
  • scopus:85067984424
ISSN
0168-9002
DOI
10.1016/j.nima.2019.06.045
language
English
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yes
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e1c638fa-f65a-4fed-b45b-6284c8632156
date added to LUP
2019-06-28 16:50:35
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2019-08-23 13:02:40
@article{e1c638fa-f65a-4fed-b45b-6284c8632156,
  abstract     = {In the RB experiment at FAIR, charged particles with energies up to 600 MeV and forward boosted -rays with energies up to 20 MeV need to be detected in scattering experiments. Calorimeters for nuclear physics experiments of this kind, using relativistic radioactive ion beams, require high energy resolution and high efficiency for simultaneous detection of strongly Doppler shifted -rays and high-energy charged particles. A calorimeter design that can meet these requirements, using CsI(Tl) scintillators, results in detector elements that may exhibit light output variations with crystal depth, which can limit the attainable resolution. In this paper we present results from a systematic study of 478 detector modules of CALIFA, the RB calorimeter, in order to determine and minimize such variations. To facilitate further systematic studies we also present results for the total absorption length of the scintillation light, using spectrophotometry, light crosstalk between adjacent detector modules, and surface topography of the CsI(Tl) crystals from atomic force microscopy.},
  author       = {Knyazev, Alexander and Park, Joochun and Golubev, Pavel and Cederkäll, Joakim and Alvarez-Pol, H and Cabanelas, P. and Casarejos, Enrique and Causeret, L. and Cortina-Gil, D and Diaz Fernandez, P. and Feijoo, M. and Galaviz, D. and Galiana, E. and Gernhäuser, R. and Hartig, A. and Heinz, A and Heiss, B. and Ignatov, A. and Johansson, H. T. and Klenze, P. and Kröll, T. and Nilsson, T and Perea, A. and Rhee, H. B. and Tengblad, O and Teubig, P.},
  issn         = {0168-9002},
  language     = {eng},
  pages        = {393--404},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment},
  title        = {Properties of the CsI(Tl) detector elements of the CALIFA detector},
  url          = {http://dx.doi.org/10.1016/j.nima.2019.06.045},
  volume       = {940},
  year         = {2019},
}