Update on the DB Girders FE Analyses 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens

Girder max Deformation DB Quad Weight Approximations Weight Safety Factor Girder max Deformation (Boostec - SiC) DB-quad Weight Estimation (Summer 2009) for girder design 112 kg per DB-quad 2.6 ≤ 10μm Confirmation for DB-quad mock-up weight (Feb 2011) 80 kg per DB-quad 3 .6 Correction on the DB-quad mock-up weight (15 Mar 2011) 170 kg per DB-quad 1.5 ~19 μm Risen Concern: DB-quad being housed on top of the brazed girder area containing high density of SiN and average quantity of SiC The existing value for the weight of the DB-quad mock-up is only 5% bigger than the expected weight of the real DB-quad 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens

FE Analysis: Boostec Girder Boostec girder Deformation ≤ 17 μm Boostec girder eigenfrequency: 37.7 Hz 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens

FE Analysis: Epucret Girder Epucret girder Deformation ≤ 18.7 μm Epucret girder eigenfrequency: 61.5 Hz 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens

Concern - Possible Future Task: Comments are always welcome! Summary & Future Steps A B C Concern - Possible Future Task: Epucret top reference surfaces could be affected by the increased weight? A rupture investigation for fine ceramics (like SiC, Epument) would need thorough time-consuming simulation with fatigue time and dedicated fracture mechanics background for a specific material. Comments are always welcome! 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens

Thank you! 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens 6

Supplementary Slide Weight Estimation of the CLIC-Module [Type 0] MAIN BEAM Material Density (kg/m3) Weight / Unit (kg) Quantity Total Weight (kg) ΜΒ-magnet Support   1 Cradles 6,5 2 13 Integral "V" Support StSt 8080 15 5 75 Vacuum Manifold (welding, bolts & nuts included) 50 Pumps 20 Vacuum Reservoir Accelarating Structure (Φ=140) Cu 8940 70 4 280 Loads Waveguides from CMF to ACS Splitter Cooling Blocks 265 Girder Weight SiC 3128* 56 230 Total 976 Supplementary Slide Type 0 DRIVE BEAM Material Density (kg/m3) Weight / Unit (kg) Quantity Total Weight (kg) DB Magnets   112 2 224 Cradles 6,5 13 Integral "V" Support (different for the PETS & DB Drift Tube) StSt 8080 13/15 0 and 6 90 Vacuum Manifold (welding, bolts & nuts included) 50 Pumps 20 1 Vacuum Reservoir 15 PETS (with on-off mechanisms and couplers) Cu 8940 22 4 88 Mini-Tank 3 12 DB Drift Tube RF Distribution [Waveguides + Flanges (WR90 + Hammer Type)] 11/AS 44 Cooling Blocks Girder Weight SiC 3128* 56 233 Total 802 EDMS 1009300 Total Weight of Type-0 [MB+DB] (kg) 1778 * An average SiC density value is taken for estimation. It might change depending on particular material properties. 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens

Supplementary Slide CLIC-Module MB & DB Baseline Girder Handling Zones Technical Specification: EDMS 1061067 Supplementary Slide CLIC Type 0 Supporting System (space reservation) Girder Baseline Configuration (Nov 2009): Max. Vertical & Lateral Deformation at 10μm Max. Girder Weight at 240kg Max. Girder Length of 2m Max. Load on top of the Girder 400kg/m (distributed weight) Rectangular Space Reservation of External Dimensions of [320*150]mm References Surfaces (as presented in color surfaces with possibility of tolerancing ≤ 20 μm) Baseline Configuration with Reference Surfaces DB-quad: Non-concentrated weight of comparable order of magnitude 350 mm 150 mm 150 mm 350 mm Handling Zones 21 March 2011 Nick Gazis, CERN-BE/RF & NTU-Athens