Elias Metral, CERN "AD Seminar - Preparing for the beam commissioning of high-intensity and/or high-brightness particle accelerators: beam dynamics and collective effects"

Tuesday 6 May 2025, 15:00 → 16:00 Europe/Stockholm

Universe + Zoom (ESS)

The successful commissioning of high-intensity and/or high-brightness particle accelerators is a multi-year endeavor that relies critically on a deep understanding and careful control of beam dynamics, particularly collective effects. To ensure efficient commissioning, it is essential to carry out extensive beam dynamics studies in advance and to validate them progressively through a well-structured, staged approach during operation.

In complex machines such as the CERN Large Hadron Collider (LHC), not only must individual mechanisms—such as linear and nonlinear optics and RF, synchrotron radiation, IBS, space charge, impedance, electron cloud, beam-beam interactions, transverse damper and noise—be well understood, but also their nonlinear interplay must be analyzed and anticipated. This seminar will highlight key lessons learned from the commissioning of the LHC since 2008, as well as from its injector complex, which is now fully equipped to deliver the demanding beam parameters required for the High-Luminosity LHC (HL-LHC). Emphasis will be placed on how predictive modeling and stepwise validation contributed to readiness and performance, and how these practices can inform future accelerator commissioning campaigns.

 

Short bio: Elias has extensive experience in the world of accelerators. He earned his PhD in 1999 from Joseph Fourier University in Grenoble and is now a Senior accelerator physicist at the CERN Beams department and is the director of JUAS (Joint Universities Accelerator School).