Performance recovery of long CsI(Tl) scintillator crystals with APD-based readout

被引：2

作者：

Cabanelas, P. ^{[1
,2
]}

Gonzalez, D. ^{[1
,2
]}

Alvarez-Pol, H. ^{[1
,2
]}

Boillos, J. M. ^{[1
,2
]}

Casarejos, E. ^{[3
]}

Cederkall, J. ^{[7
]}

Cortina, D. ^{[1
,2
]}

Feijoo, M. ^{[1
,2
]}

Galaviz, D. ^{[5
,6
]}

Galiana, E. ^{[1
]}

Gernhaeuser, R. ^{[8
]}

Golubev, P. ^{[7
]}

Hartig, A. -L. ^{[4
]}

Klenze, P. ^{[8
]}

Knyazev, A. ^{[7
]}

Kroell, T. ^{[4
]}

Nacher, E. ^{[10
]}

Park, J. ^{[7
]}

Perea, A. ^{[9
]}

Pietras, B. ^{[1
,2
]}

Ponnath, L. ^{[8
]}

Rhee, H. -B. ^{[4
]}

Rodriguez-Sanchez, J. L. ^{[1
,2
]}

Suerder, C. ^{[4
]}

Tengblad, O. ^{[9
]}

Teubig, P. ^{[5
,6
]}

机构：

[1] Univ Santiago Compostela, Inst Galego Fis Altas Enerxias, E-15782 Santiago De Compostela, Spain

[2] Univ Santiago Compostela, Particle Phys Dept, E-15782 Santiago De Compostela, Spain

[3] Univ Vigo, E-36310 Vigo, Spain

[4] Tech Univ Darmstadt, Inst Kernphys, Fachbereich Phys, D-64289 Darmstadt, Germany

[5] LIP, Lab Instrumentat & Expt Particle Phys, P-1649003 Lisbon, Portugal

[6] Univ Lisbon, Fac Ciencias, Dept Fis, P-1749016 Lisbon, Portugal

[7] Lund Univ, Dept Phys, SE-22100 Lund, Sweden

[8] Tech Univ Munich, Phys Dept, D-85748 Garching, Germany

[9] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[10] Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Valencia, Spain

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2020年 / 965卷

基金：

欧盟地平线“2020”;

关键词：

CsI(Tl) scintillator crystals; Energy resolution; Non-uniformity light output; Optical Coupling; Avalanche Photo-Diodes; CALIFA; DETECTOR; CALORIMETER;

D O I：

10.1016/j.nima.2020.163845

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

CALIFA is the high efficiency and energy resolution calorimeter for the (RB)-B-3 experiment at FAIR, intended for detecting high energy light charged particles and gamma rays in scattering experiments, and is being commissioned during the Phase-0 experiments at FAIR, between 2018 and 2020. It surrounds the reaction target in a segmented configuration with 2432 detection units made of long CsI(Tl) finger-shaped scintillator crystals. CALIFA has a 10 year intended operational lifetime as the (RB)-B-3 calorimeter, necessitating measures to be taken to ensure enduring performance. In this paper we present a systematic study of two groups of 6 different detection units of the CALIFA detector after more than four years of operation. The energy resolution and light output yield are evaluated under different conditions. Tests cover the aging of the first detector units assembled and investigates recovery procedures for degraded detection units. A possible reason for the observed degradation is given, pointing to the crystal-APD coupling.

引用

页数：6

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