Chapter 4: High-gradient plasma and laser accelerators


  • R. Assmann
  • E. Gschwendtner
  • K. Cassou
  • S. Corde
  • L. Corner
  • B. Cros
  • M. Ferrario
  • S. Hooker
  • R. Ischebeck
  • A. Latina
  • O. Lundh
  • P. Muggli
  • P. Nghiem
  • J. Osterhoff
  • T. Raubenheimer
  • A. Specka
  • J. Vieira
  • M. Wing



Novel high-gradient accelerators have demonstrated acceleration of electrons and positrons with electric field strengths of 1 to > 100 GeV/m. This is about 10 to 1000 times higher than achieved in RF-based accelerators, and as such they have the potential to overcome the limitations associated with RF cavities. Plasma-based accelerators have produced multi-GeV bunches with parameters approaching those suitable for a linear collider. These accelerators offer the prospect of near term, compact and cost-effective particle physics experiments that provide new physics possibilities supporting precision studies and the search for new particles.

The expert panel has defined a long term R&D roadmap towards a compact collider with attractive intermediate experiments and studies. A delivery plan for the required R&D has been developed and includes work packages, deliverables, a minimal plan, connections to ongoing projects and an aspirational plan.