Abstract
A new method able to transport charged particle beams along a curved path is presented. It is based on curved capillary-discharge waveguides where the induced azimuthal magnetic field is used to focus the beam and, at the same time, keep it close to the capillary axis. We show that such a solution is highly tunable, it allows to develop compact structures providing large deflecting angles and, unlike conventional solutions based on bending magnets, preserves the beam longitudinal phase space. Such a feature, in particular, is very promising when dealing with ultra-short bunches for which non-trivial manipulations on the longitudinal phase spaces are usually required when employing conventional deflecting devices.
Highlights
Nowadays there is a growing interest in the development of new compact devices able to deflect charged particle beams with large energies
According to the Ampere law, an azimuthal magnetic field Bφ is induced across the capillary whose strength increases radially and, unlike standard quadrupoles, provides symmetric focusing of the beam in both transverse planes
In the active plasma lens the Lorentz force produced by the azimuthal magnetic field pushes the travelling particles toward the capillary axis and the same applies for curved shapes since the flux of plasma electrons driven by the discharge follows the capillary geometry.[31,32]
Summary
Nowadays there is a growing interest in the development of new compact devices able to deflect charged particle beams with large energies. Guiding of charged particle beams in curved capillary-discharge waveguides
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