Physics – Accelerator Physics
Scientific paper
2011-08-15
Instruments and Experimental Techniques, 2011,Vol.54, No 5, pp.632-638
Physics
Accelerator Physics
8 pages, 9 figures
Scientific paper
The efficiency of the beam extraction and collimation systems in circular accelerators with the use of the channeling effect in a bent crystal is determined. The dependences of the extraction efficiency on the geometrical parameters of the crystal (its length, thickness, and bending angle), the azimuthal location of the system components, and the offset of the septum or scraper are presented. The influence of crystal imperfections (amorphous layers, misorientation, and torsion) on the efficiency of the systems is considered, and their tolerances are proposed. It is shown that an extraction efficiency of >95% can be attained over a wide energy range from 2 GeV to 7 TeV by optimizing the crystal parameters and the positions of the system components.
Chesnokov Yu. A.
Maisheev V. A.
Yazynin I. A.
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