Speaker
Alessandro DALLOCCHIO
(CERN)
Description
Dynamic phenomena provoked by the rapid interaction of energetic particle beams with slender structures
usually known as thermally induced vibrations are presented. Specific regard is given to the analysis
of the accident case triggered by a beam injection error at 450 GeV, recently tested at CERN on LHC
collimator prototypes.
A simplified analytical method, which was previously developed, has proved useful to obtain a preliminary
estimation of the vibrations induced on a collimator jaw.
A 3D Finite Element model for thermo-structural fast-transient elastic-plastic analysis has been fully studied.
The numerical method is carefully described with particular attention to initial conditions, boundary conditions
and integration scheme.
Numerical results are in good agreement with experimental measurements performed via Laser Doppler Vibrometer.
Co-authors: BERTARELLI Alessandro (CERN)
Primary author
Alessandro DALLOCCHIO
(CERN)
Co-author
Alessandro BERTARELLI
(CERN)
