Properties of the CsI(Tl) detector elements of the CALIFA detector
Journal article, 2019
In the R3B experiment at FAIR, charged particles with energies up to 600 MeV and forward boosted γ-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 γ-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 R3B 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.
Absorption length
Surface topography
Nuclear reactions
CsI(Tl) energy resolution
APD
Cross talk
Calorimeters
Scintillators
Author
A. Knyazev
Lund University
J. Park
Lund University
P.I. Golubev
Lund University
J. Cederkall
Lund University
H. Alvarez-Pol
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
LIP - Lisboa
E. Galiana
LIP - Lisboa
R. Gernhäuser
Technical University of Munich
A. L. Hartig
Technische Universität Darmstadt
Andreas Martin Heinz
Chalmers, Physics, Subatomic and Plasma Physics
B. Heiss
Technical University of Munich
A. Ignatov
Technische Universität Darmstadt
Håkan T Johansson
Chalmers, Physics, Subatomic and Plasma Physics
P. Klenze
Technical University of Munich
T. Kröll
Technische Universität Darmstadt
Thomas Nilsson
Chalmers, Physics, Subatomic and Plasma Physics
A. Perea
CSIC - Instituto de Estructura de la Materia (IEM)
H. B. Rhee
Technische Universität Darmstadt
O. Tengblad
CSIC - Instituto de Estructura de la Materia (IEM)
P. Teubig
LIP - Lisboa
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
0168-9002 (ISSN)
Vol. 940 393-404Construction of FAIR-NUSTAR experiments
Swedish Research Council (VR) (2014-06644), 2016-01-01 -- 2018-12-31.
Exotiska nukleära system vid gränsen för existens - fysik i frontlinjen med perspektiv mot FAIR
Swedish Research Council (VR) (2017-03839), 2018-01-01 -- 2021-12-31.
Subject Categories
Accelerator Physics and Instrumentation
Subatomic Physics
Atom and Molecular Physics and Optics
Roots
Basic sciences
DOI
10.1016/j.nima.2019.06.045