Speakers
Description
Electromagnetic calorimetry in high-radiation environments presents significant challenges, particularly in forward regions of lepton and hadron collider detectors. The conventional solution is to construct a sampling calorimeter using radiation-hard active media, though this often compromises energy resolution. To address this issue, we developed a novel approach: secondary emission calorimetry, which offers a radiation-hard, fast, robust, and cost-effective alternative. We built prototype secondary emission sensors and tested them in beam tests. In a secondary emission detector module, secondary emission electrons are produced from a cathode when charged hadrons or electromagnetic shower particles pass through the sampling module. These secondary emission electrons are then multiplied, much like photoelectrons in photomultiplier tubes. This report outlines the principles of secondary emission calorimetry, presents results from beam tests, and discusses Monte Carlo simulations with projections for large-scale secondary emission electromagnetic calorimeters.
