Focusing of a 1-GeV proton beam as it is brought into the channeling regime by a curved single crystal
Andreev V. A. , Baublis V. V. , Damaskinskii E. A., Krivshich A. G., Kudin L. K. , Marchenkov V. V., Morozov V. F., Nelyubin V. V., Orishchin E. M., Petrov G. E., Ryabov G. A., Samsonov V. M. ,Samsonov L. E. , Spiridenkov E. M. , Sulimov V. V., Sumbaev O. I. , Shchegel'skii V. A.
The possibility of focusing high-energy particles by means of bulk capture of particles in the channeling regime is demonstrated experimentally. Protons with energies of 1 GeV, as they were bulk captured by the (111) plane of a curved silicon crystal from an angular interval with FWHM = 7.2 mrad at the exit from the crystal, had an angular divergence with FWHM =1.6 mrad. The phase space of the beam of channeling particles in this case decreased slightly (by a factor of 1.8).