Remove shielding around beampipe.
Fix beampipe geometry and overlaps with Tracker
Phase II beampipe
Correct fractions
Update beampipe
Update beampipe geometry and material. Make it default for 2023 scenarios.
Merge pull request #5895 from ianna/phase2-beampipe-in-all-2023-scenarios

Phase2 Beampipe in All 2023 Scenarios