Two fully assembled sensor planes of the forward calorimeter prototypes for Future Linear Colliders were studied in an electron test beam in 2010-2011 at DESY. GaAs:Cr and Si sensors with pad structures were firstly characterized in the laboratory and then equipped with dedicated front-end electronics. The leakage current measured as a function of the bias voltage and temperature, and charge collection efficiency as a function of the bias voltage. In the beam multichannel readout was demonstrated to match the expected performance. A signal-to-noise ratio was measured of better than or equal to 20 for minimum ionising particles. The response as a function of the position on and between the pads was studied in detail.
|Journal||Proceedings of Science|
|State||Published - 2012|
|Event||36th International Conference on High Energy Physics, ICHEP 2012 - Melbourne, Australia|
Duration: 4 Jul 2012 → 11 Jul 2012