The novel XYU-GEM to resolve ambiguities

Removing ambiguities within a single stage becomes crucial when one can not use multipledetectors behind each other to resolve them which naturally is the case for neutral radiation. Anexample would be RICH detectors. Commonly, pixilated readout is choosen for thispurpose. However, this causes a remarkable increase in quantity of channels. Thus, the overallcosts of the detector would increase. Therefore, the XYU-GEM was proposed as a three coordinatestrip-readout which is combined with a triple GEM detector. The readout complements a common XYreadout with an additional projection which is tilted by 45°. The overdetermination due to threeprojections can be used to resovle ambiguities. Following the detector design will be explained,first measurements discussed to understand the response of the detector and a way to change thecharge sharing without changing the manufacturing parameters of the readout.