Observation of channeling and volume reflection in bent crystals for high-energy negative particles
- Scandale, W.
- Vomiero, A.
- Bagli, E.
- Baricordi, S.
- Dalpiaz, P.
- Fiorini, M.
- Guidi, V.
- Mazzolari, A.
- Vincenzi, D.
- Milan, R.
- Mea, Gianantonio Della
- Vallazza, E.
- Afonin, A.G.
- Chesnokov, Yu.A.
- Maisheev, V.A.
- Yazynin, I.A.
- Golovatyuk, V.M.
- Kovalenko, A.D.
- Taratin, A.M.
- Denisov, A.S.
- Gavrikov, Yu.A.
- Ivanov, Yu.M.
- Lapina, L.P.
- Malyarenko, L.G.
- Skorobogatov, V.V.
- Suvorov, V.M.
- Vavilov, S.A.
- Bolognini, D.
- Hasan, S.
- Mattera, A.
- Prest, M.
- Shiraishi, S.
DOIAbstract
AbstractDeflection due to planar channeling and volume reflection in short bent silicon crystals was observed for the first time for 150 GeV/c negative particles, π− mesons, at one of the secondary beams of the CERN SPS. The deflection efficiency was about 30% for channeling and higher than 80% for volume reflection. Volume reflection occurs, in spite of the attractive character of the forces acting between the particles and the crystal planes, in a wide angular range of the crystal orientations determined by the crystal bend angle
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