A readout for electroluminescence TPCs based on avalanche photodiodes

Electroluminescence (EL) detectors show an excellence performance in respect of energy resolution making them interesting for various applications as dark matter (DM) and double beta (DB) experiments, Compton and 'Y cameras and Xray fluorescence detectors. While the energy resolution of EL detectors is well studied, the knowledge about their tracking capabilities on larger scale is limited. In this paper the first results of a EL readout based on 25 avalanche photodiode (APD) is presented using a small high pressure time projection chamber (TPC) filled with xenon.