Relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal

Abstract

An investigation on the mechanism of relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal was carried out at the extracted line H8 from CERN Super Proton Synchrotron. The experimental results were critically compared to computer simulations, showing a good agreement. We firmly individuated a necessary condition for the exploitation of axial confinement or its relaxation for particle beam manipulation in high-energy accelerators. We demonstrated that with a short bent crystal, aligned with one of its main axis to the beam direction, it is possible to realize either a total beam steerer or a beam splitter with adjustable intensity. In particular, in the latter case, a complete relaxation from axial confinement to planar channeling takes place, resulting in beam splitting into the two strongest skew planar channels.

References in corpus (1)

• Negative Particle Planar and Axial Channeling and Channeling Collimation

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• First design of a crystal-based extraction of 6 GeV electrons for the DESY II Booster Synchrotron
• A study of small impact parameter ion channeling effects in thin crystals