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All third generation synchrotron radiation sources are currently planning upgrades toward diffraction-limited storage rings with brightness close to the theoretical limit and higher hard-x-ray production. In these new photon sources superconducting bending (superbending) magnets may play an important role to extend the useful photon energy range. The radiation produced by superbending magnet is an order of magnitude higher in photon brightness and flux than that produced by a normal conducting bending magnet, making it a superior source of hard x-rays.
As an example, in the framework of the Elettra 2.0 Project, a new superbending magnet is under development with an innovative compact design integrated with quadrupole side magnets. The 6T superbending magnet will replace a normal conducting 1.4T magnet. The magnetic design is combined with novel cryogenic solutions that combine the benefits of a liquid-helium cooled inner magnet with a liquid-helium-free upper cooling stage. A novel C-shaped design will allow to slip in and slip out the magnet from its position on the storage ring vacuum chamber. The NbTi Superconducting magnet will work at 3.5K conduction cooled, thanks a system of heat exchanger connected to a subcooled Helium bath.
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