Tunable, monochromatic x rays using the internal beam of a betatron

Kaplin, V. V.; Uglov, S. R.; Bulaev, O. F.; Goncharov, V. J.; Voronin, A. A.; Piestrup, M. A.; Gary, C. K.; Nasonov, N. N.; Fuller, M. K.
May 2002
Applied Physics Letters;5/6/2002, Vol. 80 Issue 18, p3427
Academic Journal
Tunable, monochromatic x rays from thin radiators mounted inside a betatron have been observed. Parametric x-ray radiation (PXR) was generated by 33-MeV electrons passing multiple times through three radiators: a 43-µm-thick Si crystal, a 400-µm-thick graphite crystal, or a 310-layered-pair (W and B[sub 4]C, d=14.86 Å) multilayer. The pulse-height spectrum of the radiation (5 to 30 keV) was obtained and was tuned by rocking the crystal or multilayer relative to the electron-beam direction. The experimental results appear to follow theoretical predictions for PXR emission with some modification required for the curved trajectory of the electrons.


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