Accelerator Physicist (Collective Effects)

Switzerland (CH)
17 May 2018
End of advertisement period
16 Jun 2018
Academic Discipline
Physical Sciences, Physics & Astronomy
Contract Type
Fixed Term
Full Time


Are you an Accelerator Physicist (Collective Effects) experienced in collective effects and interested in working in an exciting international environment at the forefront of modern science? Take part and join one of the teams that help to deliver unique high-energy particle beams used by physicists from all over the world to answer questions at the heart of particle physics! CERN, take part!

As an Accelerator Physicist (Collective Effects) you will join:

  • The Beams (BE) Department which is at the heart of the CERN accelerator complex and hosts the groups responsible for the beam generation, acceleration, diagnostics, controls and performance optimization.
  • The Accelerators and Beam Physics (ABP) Group, responsible for beam performance from the source to the Large Hadron Collider (LHC) and carries out Research & Development (R&D) activities on the upgrade of the LHC, its injectors, and future colliders (CLIC and FCC).
  • The Hadron Synchrotron Coherent effects (HSC) Section which is responsible for studying coherent effects and their mitigation by developing theoretical models, simulation codes and by conducting experimental research. Coherent transverse instabilities induced by beam coupling impedance and space charge, beam-beam, electron cloud effects and their interplay can limit the beam intensity and brightness and therefore the performance of the present and future CERN accelerators. An accurate theoretical description, precise models, realistic simulations and thorough benchmarking with dedicated experiments are required in order to assess the present and future performance limitations and devise cures, mitigation measures and the corresponding operational scenarios. (


As an Accelerator Physicist (Collective Effects), you will contribute to the study of the collective effects in particle accelerators, in particular the mechanisms responsible for transverse coherent beam instabilities. You will also devise mitigation techniques to push further the performance of the existing and future CERN accelerators.

Specific tasks will include:

  • Development and maintenance of simulation codes to study single-bunch and coupled-bunch coherent beam instabilities in the CERN accelerators by including the combined effects of: beam coupling impedance; space charge; electron cloud (without or with another ion beam); beam-beam; lattice optical properties (tune, coupling, chromaticity and other nonlinear properties); longitudinal motion; transverse feedbacks, etc.
  • Validation of the simulations in the different CERN accelerators by conceiving and conducting machine experiments and analysing the corresponding beam data.
  • Conception of cures and/or mitigation techniques.