One of the big detectors which record these collisions, they didn't think there was technology that could withstand the radiation that would be created in the LHC, so there was basically a lump of lead in the middle of this object with some detectors around the outside, but subsequently we have developed technology.
Para um dos detectores que registram as colisões, pensáva-se não existir tecnologia que pudesse resistir à radiação que seria criada no LHC. Era basicamente um pedaço de chumbo no meio deste objeto, com detectores em torno dele. Mas depois desenvolvemos tecnologia.