Gamma-Ray Induced Radiation Damage in Large Size LSO and LYSO Crystal Samples

Chen, Jianming; Mao, Rihua; Zhang, Liyuan; Zhu, R. Y.

doi:10.1109/tns.2007.902370

Cited by 46 publications

(26 citation statements)

References 11 publications

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“…Their excellent radiation hardness against gamma rays [15,20], neutrons [17] and charged hadrons [10] also makes them a preferred material for calorimeters to be operated in a severe radiation environment, such as the HL-LHC. The top plot of Fig.…”

Section: Radiation Hard Lyso/lso Crystalsmentioning

confidence: 99%

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The next generation of crystal detectors

Zhu

2017

Radiat Detect Technol Methods

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Background In high-energy and nuclear physics experiments, total absorption electromagnetic calorimeters made of inorganic crystals are known for their superb energy resolution and detection efficiency for photon and electron measurements. A crystal calorimeter is thus the choice for those experiments where precision measurements of photons and electrons are crucial for their physics missions. It is also known that the existing crystal detectors are neither bright nor fast enough nor radiation hard enough to survive severe radiation environment expected in future HEP experiments. Crystal detectors have also been proposed to build a homogeneous hadron calorimeter to achieve unprecedented jet mass resolution by duel readout of both Cherenkov and scintillation light, where the development of cost-effective crystal detectors is a crucial issue because of the 100 cubic meters crystal volume required. Purpose To develop novel inorganic crystal scintillatorbased detector concepts for future HEP experiments at the energy and intensity frontiers. Methods Optical and scintillation properties of novel inorganic crystal scintillators, such as excitation, emission and transmittance spectra, light output and decay time, are characterized before and after irradiation by ionization dose and hadrons. Their performance and radiation hardness are compared to the requirements, and feedback is given to the crystal manufacturers for quality improvement. Results As a result of this investigation, several inorganic crystal scintillator-based detector concepts are established for future HEP experiments, such as an LSO/LYSO crystalbased total absorption and/or sampling calorimeter concept, a barium fluoride crystal-based very fast crystal calorimeter concept, and a cost-effective inorganic scintillator-based homogeneous hadron calorimeter concept. Conclusion Bright, fast and radiation hard LYSO/LSO crystals may be used for a total absorption ECAL. An LYSO/W Shashlik sampling calorimeter will survive the harsh radiation environment expected at the HL-LHC. With sub-ns decay time of its fast scintillation component and excellent radiation hardness, barium fluoride crystals would provide more than ten times faster rate and timing capability, provided that their slow scintillation component is effectively suppressed to avoid pileup. PbF2, PbFCl and BSO crystals may provide a foundation for a homogeneous hadron calorimeter with dual readout for both Cherenkov and scintillation light to achieve unprecedented jet mass resolution for future lepton colliders.

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Section: Radiation Hard Lyso/lso Crystalsmentioning

confidence: 99%

“…The top plot of Fig. 5 shows the photoluminescence spectra of a LYSO crystal measured before (blue) and after (red) 1 Mrad γ -ray irradiation [20]. To facilitate a comparison, these spectra were normalized to the area between 380 and 460 nm under the spectra.…”

Section: Radiation Hard Lyso/lso Crystalsmentioning

confidence: 99%

The next generation of crystal detectors

Zhu

2017

Radiat Detect Technol Methods

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“…In the last years, LYSO crystals have been also proposed as a candidate material for crystal calorimeters, such as those at SuperB factory [1], Mu2e [2] and the COMET experiment [3]. LYSO crystals have a large stopping power, a fast decay time, a large light yield and a good radiation hardness against gamma rays, neutrons and protons, as seen from Table I [4][5][6][7]. Figure 1 shows the emission and the transmittance spectra of the LYSO crystal.…”

Section: Introductionmentioning

confidence: 99%

Simulation of LYSO Crystal for the TAC-PF Electromagnetic Calorimeter

Kocak

Tapan

2017

Acta Phys. Pol. A

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In addition to PWO and CsI(Tl) crystals, cerium doped LYSO crystal is considered for the electromagnetic calorimeter part of the Turkish Accelerator Center Particle Factory (TAC-PF) detector, because of its high light yield, fast decay time and good radiation hardness. In this work, LYSO crystals arranged in 3×3 and 5×5 matrices have been simulated against photons in the energy range between 50 MeV and 2 GeV, using Geant4 simulation code. Energy resolutions have been estimated considering the contribution of photoelectron statistics coming from the avalanche and PIN photodiodes.

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“…The camera presented in this work is composed of a Hamamatsu H8500 Flat Panel PS-PMT (Hamamatsu Photonics, 2007), a LYSO scintillator (Chen, 2007), a resistive chain, a data acquisition system and a hardware architecture for image reconstruction. Fig.…”

Section: Methodsmentioning

confidence: 99%