PANDA ECAL

AG Brinkmann is involved in the planning, testing and construction of the electromagnetic calorimeter (EMC) of the PANDA detector. The EMC is a central component of the PANDA detector, which is being built in Darmstadt. The EMC will be used to measure photons and electrons. Due to a high count rate and the desired compact design of the target spectrometer, fast scintillators with a short radiation length are required for the EMC. The material lead tungstate (PbWO4) as an inorganic scintillator has a high density and a good energy resolution for photons and electrons and is therefore very well suited for these requirements. Furthermore, the decay time of less than 20 ns is very short and the beam hardness is relatively good. A total of 15552 lead tungstate crystals are required for the calorimeter. This allows a solid angle of almost 4π to be filled.

The Brinkmann working group measured the properties of the crystals and built and tested prototypes for the EMC. The first slice of the EMC is currently being set up in Giessen and work is underway to optimize the selection process.

More information can be found in the Technical Design Report.