کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10721956 | 1033655 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Observation of parametric X-rays produced by 400 GeV/c protons in bent crystals
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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 10â6 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 701, Issue 2, 4 July 2011, Pages 180-185
Journal: Physics Letters B - Volume 701, Issue 2, 4 July 2011, Pages 180-185
نویسندگان
W. Scandale, G. Arduini, R. Assmann, F. Cerutti, S. Gilardoni, J. Christiansen, E. Laface, R. Losito, A. Masi, E. Metral, D. Mirarchi, S. Montesano, V. Previtali, S. Redaelli, G. Valentino, P. Schoofs, G. Smirnov, L. Tlustos, A.S. Gogolev,