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  • What is special regarding the CLIC accelerating scheme?

    In a classical approach, the linear accelerators used to accelerate the beams would be powered by Radio Frequency (RF) power supplies, called klystrons. In the CLIC acceleration scheme, the klystrons are replaced with an intense particle beam, called the drive beam. The kinetic energy in the drive beam is converted into RF power, which in…

  • Why a two-beam scheme?

    The luminosity of the accelerator scales as the wall-plug-to-beam efficiency. So one needs at the same time a high-gradient acceleration and an efficient energy transfer. The use of high-frequency RF maximizes the electric field in the RF cavities for a given stored energy. However, standard RF sources scale unfavorably to high frequencies, both in maximum…

  • Why linear acceleration?

    When particles change direction (as they must in a circular collider) they emit photons and lose energy. This effect, called synchrotron radiation, can be avoided by accelerating particles in a straight line. The challenge of linear acceleration is to achieve a very high acceleration gradient, because, unlike in circular machines, the particles pass through a…