Technical design report for the CODEX-${\hat{I}}^2$ demonstrator

b collaboration, Giulio Aielli, Juliette Alimena +56

The CODEX-${\hat{I}}^2$ apparatus is a demonstrator for the proposed future CODEX-b experiment, a long-lived-particle detector foreseen for operation at IP8 during HL-LHC data-taking. The d…