Observation of narrow-band Si L-edge Cˇerenkov radiation generated by 5 MeV electrons

Knulst, W.; Luiten, O. J.; van der Wiel, M. J.; Verhoeven, J.
October 2001
Applied Physics Letters;10/29/2001, Vol. 79 Issue 18, p2999
Academic Journal
Narrow-band Cˇerenkov radiation at 99.7 eV has been generated by 5 MeV electrons in a silicon foil, with a yield ∼1×10[sup -3] photon/electron. These measurements demonstrate the feasibility of a compact, narrow-band, and intense soft x-ray source based on small electron accelerators. The observed yield and dependence of the photon spectrum on emission angle are in agreement with theoretical predictions for Cˇerenkov radiation based on refractive index data of silicon. © 2001 American Institute of Physics.


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