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

Universidad de 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. 940 393-404

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Swedish Research Council (VR), 2016-01-01 -- 2018-12-31.

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Swedish Research Council (VR), 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

More information

Latest update

5/11/2020