Evidence for compensation in a Si hadron calorimeter

In a hadron sampling calorimeter with silicon readout, a combination of plates of low-Z (Fe) and high-Z (Pb) materials used as absorbers makes possible the reduction of the calorimeter response to the electromagnetic component of the incoming hadronic showers. This reduction is produced by a filtering effect. As a result, a ratio, varying from e/ pi >1 to e/ pi <1, is obtained as a function of the low-Z material thickness, demonstrating the possibility of achieving the compensation condition (e/ pi =1).<
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