Title :
Record deflection efficiencies measured for high energy protons in a bent germanium crystal
Author :
Biino, C. ; Clément, M. ; Doble, N. ; Elsener, K. ; Gatignon, L. ; Grafström, P. ; Mikkelsen, U. ; Freund, A. ; Kirsbom, K. ; Møller, S.P. ; Uggerhøj, E. ; Worm, T.
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
New experimental results on the deflection of high energy protons in a bent germanium crystal are presented. At 450 GeV/c, the 50 mm long crystal gave record deflection efficiencies up to 60% for small angles (1 mrad), while at angles as large as 12 mrad, the efficiency is about 25 times larger than for a silicon crystal of the same size. The experimental results are in good agreement with a model for channeling and deflection developed by Ellison (1982) and give together with a similar comparison for a 200 GeV/c beam-confidence in extrapolations to higher energies (e.g., to LHC), other crystal materials or different deflection angles
Keywords :
beam handling equipment; channelling; germanium; proton beams; Ge; bent germanium crystal; channeling; deflection angles; deflection efficiencies; high energy protons; Crystalline materials; Crystallization; Crystals; Energy measurement; Germanium; Particle beams; Protons; Scattering; Silicon; Testing;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.749550
