Observation of nuclear dechanneling for high-energy protons in crystals
- Scandale W
- Vomiero A
- Baricordi S
- Dalpiaz P
- Fiorini M
- Guidi V
- Mazzolari A.
- Milan R
- Della Mea G
- Ambrosi G
- Bertucci B
- Burger WJ
- Zuccon P
- Cavoto G
- Santacesaria R
- Valente P
- Vallazza E
- Afonin AG
- Chesnokov YA
- Maisheev VA
- Yazynin IA
- Kovalenkok AD
- Taratin AM
- Denisov AS
- Gavrikov YA
- Ivanov YM
- Lapina LP
- Malyarenko LG
- Skorobogatov VV
- Suvorov VM
- Vavilov SA
- Bolognini D
- Hasan S
- PREST, MICHELA
Publication date
January 2009
DOIAbstract
Channeling in a short bent silicon crystal was investigated at the CERN SPS using 400-GeV/c protons with an angular spread much narrower than the critical channeling angle. Particle dechanneling due to multiple scattering on the atomic nuclei of the crystal was observed and its dechanneling length was measured to be about 1.5 mm. For a crystal with length comparable to such dechanneling length, an efficiency of 83.4% was recorded, which is close to the maximum value expected for a parallel beam and exceeds the previously known limitation of deflection efficiency for long crystal
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