Speaker
Description
Hadronic showers develop an electromagnetic (from neutral mesons such as π 0 and η 0 ) and a non-electromagnetic component that are sampled with very different sensitivities (“non compensation”) in traditional calorimeters. The large fluctuations among the relative weight of the two components largely dominate the detector response resolution. Dual-readout calorimetry is a technique able to overcome this problem through the detection of two, independent, scintillation and Cherenkov light signals. The former is correlated with the whole energy deposition in the calorimeter while the latter provides a signal almost exclusively related to the electromagnetic component. The combination of the two allows to estimate, event by event, the electromagnetic fraction and correctly reconstruct the primary-hadron energy. The expected energy resolution for single hadron detection, estimated to be better than ~40%/√E, together with the excellent particle identification capability, makes a dual-readout fibre-sampling calorimeter one of the most promising options for future leptonic colliders. A first module, with Silicon PhotoMultipliers (SiPM) single-fibre readout, was designed, constructed and tested with beams. Thanks to their high photon-detection efficiency, high granularity and compactness, SiPMs represent the most promising solution to exploit this technique for future collider experiments. On the other hand, much attention is needed in order to minimize the optical crosstalk between the two types of fibers, which are located very close to each other and carry light signals that differ in intensity by about 2 orders of magnitude.
In this talk, the most significant testbeam results (about crosstalk, linearity response and particle separation capability) will be presented. We will discuss as well the R&D program that is planned in order to move towards a successful exploitation of a dual-readout fibre-sampling calorimeter at future e+e- colliders.
Secondary topics
Silicon PhotoMultipliers application for dual-readout fibre calorimetry light detection
| Applications | Design concepts for future calorimeter at the energy frontier |
|---|---|
| Primary topic | Dual-readout |
