Phys. Rev. Lett. 101, 164801 (2008) [4 pages]High-Efficiency Deflection of High-Energy Protons through Axial Channeling in a Bent CrystalReceived 30 May 2008; published 16 October 2008 Beam deflection due to axial channeling in a silicon crystal bent along the ⟨111⟩ axis was observed with 400 GeV/c protons at the CERN Super Proton Synchrotron. The condition for doughnut scattering of protons by the atomic strings of the crystal was attained. Such a condition allowed one to observe a beam deflection of 50 μrad with about 30% efficiency. The contribution of hyperchanneled states of protons to the observed beam deflection was less than 2% according to simulation results. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.164801
DOI:
10.1103/PhysRevLett.101.164801
PACS:
41.85.−p, 61.85.+p
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