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CERN = European Organization for Nuclear Research World's largest particle physics centre.

Explore the advanced pultruded composite profiles developed for CERN's cutting-edge experiments at the Large Hadron Collider (LHC) in Geneva. These profiles, featuring superior precision and quality, provide essential support for the CMS experiment's silicon detector modules. Learn about the manufacturing process, including challenges and quality control measures, to ensure the structures meet stringent requirements. Witness the groundbreaking technology that enables the study of fundamental particles and forces within the world's largest particle physics center.

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CERN = European Organization for Nuclear Research World's largest particle physics centre.

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  1. High-Performance Pultruded Composite Profiles Case CERNMatti Suominen, Exel OyjPentti Paajanen, Exel OyjAntti Onnela, CERNHarri Katajisto, Helsinki Institute of Physics

  2. CERN CERN = European Organization for Nuclear Research World's largest particle physics centre. To explore what matter is made of and what forces hold it together.

  3. CERN in Geneva Photo: CERN

  4. LHC = Large Hadron ColliderCERN’s present main projectDue to start in 2007 100 m 8.6 km

  5. Installation of superconductive magnets of the LHC Photo: CERN

  6. Busbar Photo: CERN

  7. Photos: CERN

  8. LHC experimental cavern 100 m underground Photo: CERN

  9. Compact Muon Solenoid (CMS) experiment of the LHC Total weight: 14,500 tons Diameter: 14.6 m Length: 21.6 m Magnetic field: 4 Tesla

  10. Construction of the CMS experiment Photo: CERN

  11. Construction of the CMS experiment Photo: CERN

  12. Tracker structures (at the centre of the CMS experiment) Main requirements: light, radiation-transparent, stiff, high-precision, stable, affordable cost Silicon detector modules supported by carbon fiber structures. “Rod” structure made of pultruded profiles

  13. ”Rod” profile manufacture Jotain yleistä valmistuksessa käytetystä laitteistosta?, sarjakoosta, valmistuksen haasteista (suoruus & seinämäpaksuus etc.)… Openings for the mechanical supports, connectors and wire routings were made using water-jet cut.

  14. ”Rod” assembly Assembly by gluing on jigs Result: Structure with precision supports for detector modules 750 “Rod” structures to be produced. Status in March 2004: 100 ready.

  15. Quality control of the rod geometry Precision of detector supports better than 0.05 mm

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