At large accelerators, bent crystals are employed to deflect weakly divergent proton beams at the stages of extraction and collimation. We demonstrate that a divergent particle beam may be efficiently deflected using a crystal with a focusing entry face. A 180 GeV/c pion beam with divergence near 0.060 mrad, which exceeds the Lindhard angle by a factor of 4, has been experimentally deflected by 0.25 mrad with efficiency near 22%. The proposed focusing crystal may serve as an element of a novel particle optics for secondary-particle beams in the TeV energy region.
Focusing of 180 GeV/c pions from a point-like source into a parallel beam by a bent silicon crystal / Scandale, W., Arduini, G., Cerutti, F., Garattini, M., Gilardoni, S., Lechner, A., Losito, R., Masi, A., Mirarchi, D., Montesano, S., Natochii, A., Redaelli, S., Rossi, R., Smirnov, G., Breton, D., Burmistrov, L., Chaumat, V., Dubos, S., Maalmi, J., Puill, V., et al.. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION B, BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - ISSN 0168-583X. - 446:(2019), pp. 15-18. [10.1016/j.nimb.2019.03.024]
Focusing of 180 GeV/c pions from a point-like source into a parallel beam by a bent silicon crystal
Rossi R.;Addesa F.;Cavoto G.Membro del Collaboration Group
;
2019
Abstract
At large accelerators, bent crystals are employed to deflect weakly divergent proton beams at the stages of extraction and collimation. We demonstrate that a divergent particle beam may be efficiently deflected using a crystal with a focusing entry face. A 180 GeV/c pion beam with divergence near 0.060 mrad, which exceeds the Lindhard angle by a factor of 4, has been experimentally deflected by 0.25 mrad with efficiency near 22%. The proposed focusing crystal may serve as an element of a novel particle optics for secondary-particle beams in the TeV energy region.| File | Dimensione | Formato | |
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