Physics – Accelerator Physics
Scientific paper
2011-05-17
Phys. Rev. Lett. 107, 084802 (2011)
Physics
Accelerator Physics
4 pages, 5 figures
Scientific paper
10.1103/PhysRevLett.107.084802
A novel concept of controlled halo removal for intense high-energy beams in storage rings and colliders is presented. It is based on the interaction of the circulating beam with a 5-keV, magnetically confined, pulsed hollow electron beam in a 2-m-long section of the ring. The electrons enclose the circulating beam, kicking halo particles transversely and leaving the beam core unperturbed. By acting as a tunable diffusion enhancer and not as a hard aperture limitation, the hollow electron beam collimator extends conventional collimation systems beyond the intensity limits imposed by tolerable losses. The concept was tested experimentally at the Fermilab Tevatron proton-antiproton collider. The first results on the collimation of 980-GeV antiprotons are presented.
Annala G.
Kuznetsov Gennady
Shiltsev Vladimir
Stancari Giulio
Still D. A.
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