High-Efficiency Deflection of High-Energy Protons through Axial Channeling in a Bent Crystal

Journal Article · Fri Oct 17 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.164801· OSTI ID:21179821

Scandale, Walter ^[1]; Vomiero, Alberto ^[2]; Baricordi, Stefano; Dalpiaz, Pietro; Fiorini, Massimiliano; Guidi, Vincenzo; Mazzolari, Andrea ^[3]; Della Mea, Gianantonio; Milan, Riccardo ^[4]; Ambrosi, Giovanni; Bertucci, Bruna; Burger, William J; Zuccon, Paolo ^[5]; Cavoto, Gianluca; Luci, Claudio; Santacesaria, Roberta; Valente, Paolo ^[6]; Vallazza, Erik ^[7]; Afonin, Alexander G; Chesnokov, Yury A ^[8]

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1. CERN, European Organization for Nuclear Research, CH-1211 Geneva 23 (Switzerland)
2. INFM-CNR, Via Valotti 9, 25133 Brescia (Italy)
3. INFN Sezione di Ferrara, Dipartimento di Fisica, Universita di Ferrara, Via Saragat 1, 44100 Ferrara (Italy)
4. INFN Laboratori Nazionali di Legnaro, Viale Universita 2, 35020 Legnaro (PD) (Italy)
5. INFN Sezione di Perugia and Universita degli Studi di Perugia, Dipartimento di Fisica, Via Pascoli, 06123 Perugia (Italy)
6. INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome (Italy)
7. INFN Sezione di Trieste, Via Valerio 2, 34127 Trieste (Italy)
8. Institute of High Energy Physics, Moscow Region, RU-142284 Protvino (Russian Federation)

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 {mu}rad with about 30% efficiency. The contribution of hyperchanneled states of protons to the observed beam deflection was less than 2% according to simulation results.

• OSTI ID: 21179821
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CERN SPS SYNCHROTRON
CHANNELING
CRYSTALS
GEV RANGE 100-1000
PROTONS
SCATTERING
SILICON
SIMULATION