Work to Date

• Analysis Work– Random Vibration Analysis of RICH2 Structure

• PSD data from LEP Tunnel (Including affect of large ventilation system)

• Excitations applied to Structure Base in UX, UY and UZ directions

• Baseline (Drawing 62 - TDR) Geometry Used with :

– Stainless Steel Box Sections - 150 x 100 x 6 mm

– Assumed 11.2 Tonnes Magnetic Shielding - Each Side

• Still awaiting measurements from Pit 8

• Mechanical Design Work– Stainless Steel Box Section Availability - 150 x 100 x 6 mm Initially Chosen

– Build 3D Parametric CAD Model in Pro/Engineer

• Continuous Modifications to Baseline Design

STATUS OF RICH2 MECHANICS

STATUS OF RICH2 MECHANICS

Ongoing and Future Work• Random Vibration Analysis using Pit 8 Measurements

• Low Mass Entrance and Exit Window Design

– Meeting at NIKHEF (late January - tentatively) for discussions on clearance

between T10 / T11 and RICH2

• Integration of Magnetic Shielding / Detector Assemblies and Mirror

Panels

– Further Discussions at Next Engineering Meeting 12/02/01

• Develop Suitable Window Seal Design