Abstract

The performance of a silicon/tungsten sandwich calorimeter has been investigated for incoming electron energies between 4 and 49 GeV. The calorimeter has an energy response which is linear to better than 1%, and an energy resolution of σ(E) E = (17.6±0.3)% √ τ E , where τ is the number of radiation lengths of passive material interspaced between two active samplers. The longitudinal shower development has been fitted to a two exponential component fall-off beyond the shower maximum.

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