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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Poster

HK 72.57: Poster

Thursday, March 14, 2024, 17:15–18:45, HBR 14: Foyer

βPlast, a plastic scintillator for fast timing and decay spectroscopy — •Carole Chatel for the DESPEC collaboration — IKP, TU Darmstadt, Darmstadt, Germany — GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — HFHF

Decay SPECtroscopy (DESPEC) setup investigates the properties of exotic nuclei at the FRagment Separator (FRS) at GSI and in the future at the Super-FRS at FAIR. It is composed of state-of-the-art detectors allowing fast-timing, high-precision or high-efficiency measurements. The core of the DESPEC setup comprises a stack of implantation detectors within a "snout", wherein exotic ions are implanted. It typically comprises one or more highly-segmented AIDA double-sided silicon strip detectors sandwiched by two β-plastique scintillators.

The βPlast detectors are of primary importance to provide excellent timing resolution for β particles emitted by the exotic ions of interest to enable gamma-gamma timing-measurements. They comprise rectangular monolithic plastic sheets with 1-dimensional arrays of Silicon PhotoMultipliers optically-coupled to the edges. The fast-timing characteristics of the detectors are exploited thanks to the use of TAMEX multi-channel TDCs developed in-house at GSI. The βPlast detectors have been operated during FAIR Phase-0 experiments in recent years in several configurations. This contribution provides information regarding technical details and detector characterisation, as well as recent work to improve detector performance and an outlook for future development work.

Keywords: DESPEC; β-plastique scintillators; Spectroscopy; FRS