The structural component closest to the active detection system in LSC experiments is copper.
A large LSC team is completing the procurement of ultra-pure copper, screening by gamma spectrometry (HPGe) and mass spectrometry (ICPMS) and radiopurity improvement by electroforming (EFCu).
![Cobre_LSC](https://lsc-canfranc.es/wp-content/uploads/2021/04/Cobre_LSC.jpg)