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  • What is special about CLIC accelerating cavities?

    CLIC accelerating structures are designed and built to run very stably at a very high accelerating gradient (100 MV/m). The structures are built to micron-level tolerances to ensure that the beam quality is not degraded by beam-to-structure misalignment effects.

  • How many two-beam modules are needed for CLIC? How many accelerating structures?

    Each 21 km main linac has 10,380 two-beam modules. Each two-beam module contains up to four PETS. Each PETS generates the RF power for two accelerating structures. CLIC therefore has 71,460 PETS and some 143,000 accelerating cavities in total. The LHC uses 8 accelerating cavities per beam.

  • How does two-beam acceleration work?

    An intense beam of electrons is accelerated to a comparatively low energy (2.4 GeV) using conventional klystrons. This ‘drive beam’ is injected into a series of Power Extraction and Transfer Structures (PETS), which decelerate the dense beam and extract its energy. This energy is fed via an RF field in a waveguide to a second…