Abstract
LYSO scintillation crystals, due to their significant characteristics such as high light yield, fast decay time, small Moliére radius, and good radiation hardness, are proposed to be used for the electromagnetic calorimeter section of the Turkish Accelerator Center Particle Factory (TAC-PF) detector. In this work, the center of gravity technique was used to determine the impact coordinates of an electron initiating an electromagnetic shower in a LYSO array, in a calorimeter module containing nine crystals, each 25 mm × 25 mm in cross-section and 200 mm in length. The response of the calorimeter module has been studied with electrons having energies in the range 0.1 GeV-2 GeV. By using the Monte Carlo simulation based on Geant4, the two-dimensional position resolution of the module is obtained as σ R mm = 3.95 ± 0.08 / E ⊕ 1.91 ± 0.11 at the center of the crystal.
Highlights
Cerium-doped silicate-based heavy scintillation crystals were initially developed for medical applications
Due to all of the above-mentioned properties, this crystal has attracted the attention of experimental high energy physics research groups working to improve the performance of electromagnetic calorimeters, such as the proposed SuperB forward parts of the endcap calorimeter [7], the KLOE experiment [8], the COMET experiment at J-PARC [9], and the Muon-to-Electron (Mu2e) experiment [10]
In addition to lead tungstate (PWO) and Thallium-activated Cesium Iodide (CsI(Tl)) crystals, LYSO scintillation crystals may be studied for the electromagnetic calorimeter (ECAL) section of the proposed Turkish Accelerator
Summary
Cerium-doped silicate-based heavy scintillation crystals were initially developed for medical applications. LYSO crystals have high stopping power (>7 g/cm3), fast decay time (40 ns) and high light yield (200 times of PWO), and superior radiation hardness against gamma rays, neutrons, and protons [4,5,6]. Due to all of the above-mentioned properties, this crystal has attracted the attention of experimental high energy physics research groups working to improve the performance of electromagnetic calorimeters, such as the proposed SuperB forward parts of the endcap calorimeter [7], the KLOE experiment [8], the COMET experiment at J-PARC [9], and the Muon-to-Electron (Mu2e) experiment [10]. This paper reports the results of a simulation study carried out with Geant to evaluate the position resolution of LYSO scintillation crystals for incident electrons at an energy range from 0.1 GeV to 2 GeV
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