A scintillator‐based particle detector for CRYRING@ESR

Christoph Hahn,Esther Menz,Günter Weber,Philip Pfäfflein,Thomas Stöhlker

doi:10.1002/xrs.3112

Abstract

With the unprecedented range of ion species and energies offered by the newly commissioned CRYRING facility, the availability of single ion detectors is of significant importance as part of standard instrumentation as well as for novel experiments. A detector system was constructed on the basis of the YAP:Ce crystal scintillator, which is at once radiation‐hard, fast, and affordable. Results of a characterization experiment confirmed the feasibility of the setup for incident ion rates on the order of MHz and found a critical fluence of some 1013 cm−2 upon which the crystal is rendered locally blind to further ion irradiation. The device was first used in CRYRING commissioning runs in August and November 2018. Future efforts will complete the integration of the detector into the GSI control and data acquisition system MBS.

Highlights

The realization of the novel FAIR accelerator and storage ring complex achieved a major milestone with the commissioning of the CRYRING facility in late 2017
To fully exploit the multifaceted field of research made accessible, robust, and reliable ion detectors are of fundamental importance.[1]. These sensors will need to cope with MHz count rates of ions with energies ranging from sub‐MeV/ u to 15 MeV/u[2] and have to withstand the radiation damage imparted by the energetic ions
Among the considered approaches for such a detector system is a device that utilizes the YAP:Ce crystal scintillator as the primary stage of ion detection and a photomultiplier tube (PMT) to record the flash of light associated with each incident ion

Summary

Introduction

The realization of the novel FAIR accelerator and storage ring complex achieved a major milestone with the commissioning of the CRYRING facility in late 2017. Neither the energy of the impinging ions nor their charge state need to be resolved, the latter being defined through the beam trajectories that intersect the sensitive surface. Among the considered approaches for such a detector system is a device that utilizes the YAP:Ce crystal scintillator as the primary stage of ion detection and a photomultiplier tube (PMT) to record the flash of light associated with each incident ion.

Results

Conclusion