Micro-pulling-down growth of long YAG- and LuAG-based garnet fibres: advances and bottlenecks - Archive ouverte HAL Access content directly
Journal Articles CrystEngComm Year : 2021

Micro-pulling-down growth of long YAG- and LuAG-based garnet fibres: advances and bottlenecks

Abstract

A technological advance in shaped μ-PD crystal growth provided us with high-quality single crystalline fibres of rare-earth garnets with the good longitudinal transparency and light attenuation length of up to 1 m. New high-energy experiments in colliders have increased the demand for cheap and radiation-hard detector materials that can be mass produced. The concepts of a new generation of high-energy physics experiments include combined electromagnetic and hadron calorimeters for the simultaneous detection of scintillation and Cherenkov emission using undoped and lanthanide-doped crystalline fibres. The micro-pulling-down (μ-PD) method provides the growth of long single crystalline fibres in a ready-to-use shape without the need for further cutting and polishing. In this highlights paper, recent achievements relating to the μ-PD growth of long Y3Al5O12 (YAG)- and Lu3Al5O12 (LuAG)-based fibres from the Institute of Light and Matter are reviewed. Optimization of the Ce concentration, pulling rate, and crystallizer configuration resulted in the formation of highly transparent LuAG:Ce fibres with a light attenuation length of up to 1 m. Meanwhile, such excellent transparency has not been reproduced in YAG:Ce fibers. The main differences in the crystallization processes of YAG- and LuAG-based fibres are discussed in connection with their physical properties. The paper also addresses the codoping of garnet fibres with Mg2+ ions and growth from non-stoichiometric melts to adjust fiber transmission and scintillation performance.
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Dates and versions

hal-03227689 , version 1 (08-11-2021)

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O. Sidletskiy, K. Lebbou, D. Kofanov. Micro-pulling-down growth of long YAG- and LuAG-based garnet fibres: advances and bottlenecks. CrystEngComm, 2021, 23 (14), pp.2633-2643. ⟨10.1039/D1CE00091H⟩. ⟨hal-03227689⟩
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