Speaker
Description
ALLEGRO is a proposed FCC-ee general-purpose detector concept with a noble-liquid electromagnetic calorimeter (ECAL) as one of its central detectors. Noble-liquid calorimetry is a strong option for future particle physics experiments – for both, hadron and lepton colliders. Such an ECAL is composed of a sandwich of 1536 multi-layer read-out electrodes realized as PCBs and the same number of absorbers immersed in a liquified noble gas at cryogenic temperatures. The absorbers are made of metallic composites using lead as core and stainless-steel as skin. The different thermal contraction coefficients of these materials as well as the resin used to glue them together, cause residual stresses in the layers. A careful study of this composite is needed to characterise its thermo-mechanical behaviour and to avoid high stresses at operating conditions. Theoretical and numerical studies have been carried out, as well as strength and contraction tests, with the aim to extract an equivalent Young’s Modulus and the thermal contraction between room temperature and 77 K.
| Submitters Country | Switzerland |
|---|
