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Title: Observation of parametric X-rays produced by 400 GeV/c protons in bent crystals
Authors: Scandale, Walter
Arduini, Gianluigi
Assmann, Ralph W.
Cerutti, Francesco
Gilardoni, Simone S.
Christiansen, Jorgen
Laface, Emanuele
Losito, Roberto
Masi, Alessandro
Metral, Elias
Mirarchi, Daniele
Montesano, Simone
Previtali, Valentina
Redaelli, Stefano
Valentino, Gianluca
Schoofs, Philippe
Smirnov, George I.
Tlustos, Lukas
Bagli, Enrico
Baricordi, Stefano
Dalpiaz, Pietro F.
Guidi, Vincenzo
Mazzolari, Andrea
Vincenzi, Donato
Buonomo, Bruno
Dabagov, Sultan B.
Murtas, Fabrizio
Carnera, Alberto
Della Mea, Gianantonio
De Salvador, Davide
Lombardi, Augusto
Lytovchenko, O.
Tonezzer, Michele
Cavoto, G.
Ludovici, Lucio
Santacesaria, Roberta
Valente, Paolo
Galluccio, Francesca
Afonin, Alexander G.
Bulgakov, M. K.
Chesnokov, Yu A.
Maisheev, Vladimir A.
Yazynin, Igor A.
Kovalenko, Alexander Dmitrievich
Taratin, Alexander M.
Gavrikov, Yu A.
Ivanov, Yuri M.
Lapina, Lyubov P.
Skorobogatov, Vyacheslav V.
Ferguson, W.
Fulcher, Jonathan Richard
Hall, Geoff N.
Pesaresi, Mark
Raymond, Mark V.
Rose, Alec W.
Ryan, Matt J.
Zorba, O.
Robert-Demolaize, Guillaume
Markiewicz, Thomas Walter
Oriunno, Marco
Wienands, U.
Efremov, Yu V.
Uglov, Sergey R.
Gogolev, Aleksey S.
Keywords: Proton beams -- Measurement
Electromagnetic waves
Crystals -- Effect of radiation on
Issue Date: 2011
Publisher: Elsevier B.V.
Citation: Scandale, W., Arduini, G., Assmann, R., Cerutti, F., Gilardoni, S., Christiansen, J.,...Gogolev, A. S. (2011). Observation of parametric X-rays produced by 400 GeV/c protons in bent crystals. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 701(2), 180-185.
Abstract: Spectral maxima of parametric X-ray radiation (PXR) produced by 400 GeV/c protons in bent silicon crystals aligned with the beam have been observed in an experiment at the H8 external beam of the CERN SPS. The total yield of PXR photons was about 10-6 per proton. Agreement between calculations and the experimental data shows that the PXR kinematic theory is valid for bent crystals with sufficiently small curvature as used in the experiment. The intensity of PXR emitted from halo protons in a bent crystal used as a primary collimator in a circular accelerator may be considered as a possible tool to control its crystal structure, which is slowly damaged because of irradiation. The intensity distribution of PXR peaks depends on the crystal thickness intersected by the beam, which changes for different orientations of a crystal collimator. This dependence may be used to control crystal collimator alignment by analyzing PXR spectra produced by halo protons.
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