Phys. Rev. Lett. 87, 094802 (2001) [4 pages]High-Efficiency Beam Extraction and Collimation Using Channeling in Very Short Bent CrystalsReceived 12 April 2001; published 14 August 2001 A silicon crystal was used to channel and extract 70 GeV protons from the U-70 accelerator with an efficiency of 85.3±2.8%, as measured for a beam of ∼1012 protons directed towards crystals of ∼2mm length in spills of ∼2s duration. The experimental data follow very well the prediction of Monte Carlo simulations. This demonstration is important in devising a more efficient use of the U-70 accelerator in Protvino and provides crucial support for implementing crystal-assisted slow extraction and collimation in other machines, such as the Tevatron, RHIC, the AGS, the SNS, COSY, and the LHC. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.094802
DOI:
10.1103/PhysRevLett.87.094802
PACS:
41.85.-p
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