Abstract:
Radiation emitted by positrons moving in a periodically deformed crystal has been experimentally observed for the first time. Radiation spectra have been measured in a wide energy range. Experimental evidence has been obtained for an undulator peak in a radiation spectrum, which is qualitatively consistent with calculations. Crystalline undulators ensure an equivalent magnetic field of 1000 T and a period in the submillimeter range and can therefore be used to generate x-ray and gamma radiation that is a hundred times harder than radiation in usual undulators.
Citation:
V. T. Baranov, S. Bellucci, V. M. Biryukov, G. I. Britvich, C. Balasubramanian, V. Guidi, G. Giannini, V. N. Zapol'skii, V. I. Kotov, A. E. Kushnirenko, V. A. Maisheev, G. Martinelli, E. Milan, V. A. Pikalov, V. I. Terekhov, U. Uggerhoj, V. N. Chepegin, Yu. A. Chesnokov, “First results of investigation of radiation from positrons in a crystalline undulator”, Pis'ma v Zh. Èksper. Teoret. Fiz., 82:9 (2005), 638–641; JETP Letters, 82:9 (2005), 562–564