Characterization and Applications of New High Quality LuAG:Ce and LYSO:Ce fibers

Stefan Diehl,Nicolas Aubry,Gabriel Ferro,Gabriel Ferro,Gabriel Ferro,Sara Faraj,The Hp3-Wp22 And The Crystal Clear Collaboration ,Rainer W Novotny

doi:10.1088/1742-6596/587/1/012067

Abstract

Inorganic scintillating fibers have a large potential as highly granular detector components in hadron and particle physics as well as in medical applications. With the micropulling-down-method a fast and cost efficient technique was developed over the last decades to grow such fibers from the melt. This paper will present the recent development of the quality of LuAG:Ce and LYSO:Ce fibers in terms of light output and light attenuation inside the fiber. For this purpose different steps in optimizing the fiber growth will be compared with the achieved fiber performance. In addition the response of the fibers to low energetic gamma rays will be studied and different readout concepts for the fibers will be discussed and compared.

Highlights

Inorganic scintillating fibers show significant advantages compared to organic fibers, like a higher light yield and a more effective interaction with electromagnetic probes due to the high Z elements contained in the fiber material
To produce highly granular detectors mechanical treatments like cutting and polishing impose a large workload. This can be avoided by producing crystals as fibers directly from the melt, like with the edge defined film-fed growth, the laser heated pedestal growth (LHPG) or the micro-pulling-down (μ-PD) method is needed
For a distance of 1 cm between γ-source and silicon photomultipliers (SiPMs), a light yield of 270 ± 25 ph/MeV has been determined with a 50 μm SiPM for 2 mm fiber wrapped with teflon

Summary

Introduction

Inorganic scintillating fibers show significant advantages compared to organic fibers, like a higher light yield and a more effective interaction with electromagnetic probes due to the high Z elements contained in the fiber material. In addition one expects a higher radiation resistance, which is especially important in highly radioactive environments like the inner or forward parts of high energy physics detectors. These advantages in combination with the high granularity of the fibers open up a wide field of applications. To produce highly granular detectors mechanical treatments like cutting and polishing impose a large workload This can be avoided by producing crystals as fibers directly from the melt, like with the edge defined film-fed growth, the laser heated pedestal growth (LHPG) or the micro-pulling-down (μ-PD) method is needed.

Response to alpha particles

The results do not indicate a

Conclusion and Outlook