Speaker
Alessandro Bertarelli
(CERN)
Description
The functional requirements of the LHC Collimators impose, for the start-up of the machine and the initial
luminosity runs (Phase 1), a collimation system with a very high dimensional stability in nominal
operating conditions, under considerable thermal loads and, at the same time, maximum robustness in
case of accidental beam impacts.
In order to meet these requirements and to optimize the complex mechanical design, the extensive
use of in-depth numerical analyses was essential. Given the number and the detail of the elements which
had to be taken into account in the collimator model, the recourse to a general-use, comprehensive,
multiphysics finite-element code was necessary: ANSYS Multiphysics proved very effective in dealing
with the coupled thermal/structural problems which were typically encountered and the disparate
nature of used materials. The methods used and the approaches developed to correctly apply the
thermal loads and to study coupled-field problems in the steady-state and transient domains, using both
fully elastic and elastic-plastic material properties will be presented.
Co-authors: DALLOCCHIO Alessandro (CERN)
Primary author
Alessandro Bertarelli
(CERN)
Co-author
Alessandro Dallocchio
(CERN)
