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Static and modal behaviour of the clic main beam bpm support

Static and modal behaviour of the clic main beam bpm support. CLIC Test Module meeting 7th March 2012 . M. Esposito, EN-MME .

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Static and modal behaviour of the clic main beam bpm support

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  1. Static and modal behaviour of the clic main beam bpm support CLIC Test Module meeting 7th March 2012 M. Esposito, EN-MME The research leading to these results has received funding from the European Commission under the FP7 Research Infrastructures project EuCARD

  2. The Model Alignment target Support (316L) Chamber adapter (304L) Flange Upstream body (316LN) Intermediate body (316LN) Mass of BPM Support: ~0.2kg Mass of BPM Assembly: ~0.7kg Mass of Align. Support: ~0.14kg Main Body (316LN) BPM Support (304L) M. Esposito, Test Module Meeting, CERN 7 March 2012

  3. Boundary Conditions The BPM assembly is considered free on this side Support is fixed to the magnet & the chamber adapter is fixed to the vacuum chamber which are considered fixed M. Esposito, Test Module Meeting, CERN 7 March 2012

  4. Static Structural Analysis Effect of weight: 0.13 μm center 0.4 μm max Lateral stiffness: 15.5 N/μm center 9.1 N/μm min Vertical stiffness: 55 N/μm center 41 N/μm min Longitudinal stiffness: 769 N/μm center 250 N/μm min M. Esposito, Test Module Meeting, CERN 7 March 2012

  5. Modal Analysis 3rd mode (yaw with torsion) 1st mode (yaw) 2nd mode (pitch) f3=1506 Hz f2=903 Hz f1=650 Hz M. Esposito, Test Module Meeting, CERN 7 March 2012

  6. Comparisonbetweenwith and without BPM support M. Esposito, Test Module Meeting, CERN 7 March 2012

  7. Comparisonbetween BPM fullyfixed to chamber & fixedonlylongitudinally M. Esposito, Test Module Meeting, CERN 7 March 2012

  8. Conclusions • A static structural and a modal analysis of the MB BPM support has been performed and results show that the structure is quite robust against external forces and very stiff • The BPM support gives little help in terms of modal behaviour, which is already very good, but it gives a significant contribution in terms of vertical stiffness • Great attention has to be given to the rigidity of the beam chamber connected to the BPM because it is responsible in major part of the robustness and stiffness of the whole structure M. Esposito, Test Module Meeting, CERN 7 March 2012

  9. SPARE SLIDES M. Esposito, Test Module Meeting, CERN 7 March 2012

  10. Displacementduring installation Support pulls BPM 10 microns vertically Support pulls BPM 10 microns horizontally M. Esposito, Test Module Meeting, CERN 7 March 2012

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