Electromagnetic radiation of relativistic channeling particles (the Kumakhov effect)

Detailed investigation of the channeling phenomena involved in bending of high-energy beams by means of crystals

During the latest decade, experiments have been performed at the CERN SPS to investigate the use of high-energy channeled nuclei in bent crystals for extraction, beam splitting and beam bending. An understanding of channeling in a bent crystal with extraction and deflection efficiencies for different energies, crystal types and ions has been developed. Furthermore, the long-standing question of radiation damage has been addressed with encouraging outcome. This makes extrapolations possible for the construction of, e.g., an extraction device for the LHC at CERN, RHIC at Brookhaven or new splitting elements in high-energy beams.We present the main results obtained and discuss existing and future applications of bent crystals in high-energy physics.

Channeling of high-energy particles in bent crystals – Experiments at the CERN SPS

Bending of GeV particle beams by channeling in bent crystal planes

Channeling of a 450 GeV/c proton beam through a bent silicon crystal has found a novel application to the production of simultaneous particle beams. A pair of simultaneous, nearly-collinear beams of long- and short-lived neutral kaons has thereby been derived. These beams form an integral part of an experiment, NA48, at CERN, designed to measure the CP-violation parameter ϵ′ ϵ with high precision.

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B.M. Starchenko

Papers

Steering of charged particle trajectories by a bent crystal

Energy reconstruction of events in a multichannel γ-spectrometer

Steering of charged-particle trajectories by means of a curved single crystal

Investigation of a system of drift chambers at the Dubna synchrophasotron