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Observation of Fine Structure in Channeling of Particles in Bent Crystals
A Mazzolari1,2, H Backe3, L Bandiera2
1University of Ferrara, Department of Physics and Earth Sciences, Via Saragat 1/c, 44122 Ferrara, Italy.
Abstract:
We observed highly efficient manipulation of the 530 MeV positron beam at Mainz Microtron via bent crystals. The low beam divergence revealed a fine structure in the angular distribution of channeled particles. A compact analytical model, supported by Monte Carlo methods including multiple scattering, accounts for the measurements. We established a criterion for designing a crystal with reduced angular spread of channeled particles for beam manipulation at any energy. This finding is particularly useful in view of applications of channeling to the highest energies.
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