Volume 118, Number 3, May 2017
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||05 July 2017|
Observation of soft X-ray Cherenkov radiation in Al
1 Tomsk Polytechnic University - Lenin Avenue 30, Tomsk 634050, Russia
2 John Adams Institute at Royal Holloway, University of London - Egham, Surrey, TW20 0EX, UK
Received: 21 February 2017
Accepted: 12 June 2017
The soft X-ray radiation generated by 5.7 MeV electrons from both an Al foil and a Mylar film in forward direction was experimentally studied. A narrow specific directivity, an ultra-narrow spectral bandwidth and a good consistency between the experiment and theory prove that the Cherenkov radiation (CR) with photon energy near the L-edge of absorption in Al was observed. The results demonstrate that the CR spectral-angular properties and the absolute photon yield can be described well enough using Pafomov's theoretical model and Henke's refractive index database, which is essential for all practical applications.
PACS: 41.60.Bq – Cherenkov radiation / 78.70.Dm – X-ray absorption spectra / 41.60.Dk – Transition radiation
© EPLA, 2017
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