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Impact des vibrations sur les performances des futurs collisionneurs electron positron

The Future Circular Collider Study (FCC) is developing designs for a higher performance particle collider to be installed at the end of the LHC era. The FCC Study, hosted by CERN, is an international collaboration of more than 150 universities, research institutes and industrial partners from all over the world. In a tunnel of about 100 Km, three different collision options are studied : proton-proton, electron-proton and electron-positron. This project requires the development of complex instruments with innovative ideas and technologies impacting on the economy and society, and also giving the opportunities to train the next generations of researchers and engineers. In the FCC colliders and the modern collider like superKEKB in Japan, the tolerance of position and alignment of accelerator elements are so tight that vibrations have to be studied in details and mitigation strategies have to be envisaged to guarantee the designed performance. Accelerators, even if situated underground, are subjected to vibrations from several sources : natural ground motion activities (tidal movements, ocean rumbling, etc..), vibrations from human activities related to industry, transport and civil engineering, and also technical noise from cooling, power supplies and electro-magnetic fields inside the accelerator tunnel. Vibrations of accelerator elements induce detrimental effects on the beam properties that can strongly reduce the performance of modern and future colliders.

The subject of the study is focused on the simulation of optics of the superKEKEB and FCC-ee colliders with the software tools used by the accelerator community. The internship work will be mainly based on simulations but there will be also the possibility of participating in the data analysis for superKEKB. One of the goal of the simulation campaign is to calculate the vibration tolerances of the main magnetic elements in order guarantee the nominal performance of the collider. The candidate will have the opportunity to participate to an international project and collaborate with experts on accelerator physics and engineering.

o Niveau : Master 2, can be followed by a PhD

o Date du stage : printemps 2020

o Encadrants : Maurizio Serluca, Laurent Brunetti

o Téléphone : 04 50 09 17 09

o e-mail : maurizio.serluca@lapp.in2p3.fr

o Membres de l’équipe : B. Aimard, G. Balik, L. Brunetti, A. Dominjon, M. Serluca

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