Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Instrumentation

HK 23.5: Vortrag

Montag, 4. März 2013, 18:00–18:15, WIL-A221

Current status of the new LaBr₃:Ce detector array GALATEA* — •Christopher Walz¹, Ronan Lefol², Peter von Neumann-Cosel¹, Philipp Ries¹, Norbert Pietralla¹, Heiko Scheit¹, and Linda Schnorrenberger¹ — ¹Institut für Kernphysik ,TU Darmstadt, Germany — ²University of Saskatchewan, Canada

In contrast to common scintillation materials like NaI and BaF₂ the recently developed LaBr₃:Ce detectors allow measurements with excellent time resolution and high efficiency while retaining a good energy resolution. To perform successful (e,e^′γ) and (γ,γ^′γ) coincidence experiments at the linear electron accelerator S-DALINAC all three features are of utmost importance. We present the current status of the new LaBr₃:Ce detector array GALATEA (GAmma LAnthanum bromide Top Efficiency Array) consisting of 18 large 3"x3" LaBr₃:Ce detectors. One focus is on the completely digital DAQ based on flash ADCs and newly developed pulse shape analysis methods for timing and particle identification. The performance of GALATEA is discussed regarding energy resolution, time resolution, linearity and efficiency. The results are compared to GEANT4 simulations.
*Supported by DFG (SFB 634)