Carbon contamination of soft X-ray beamlines: dramatic anti-reflection coating effects observed in the 1 keV photon energy region.
J Synchrotron Radiat
; 18(Pt 5): 761-4, 2011 Sep.
Article
em En
| MEDLINE
| ID: mdl-21862857
ABSTRACT
Carbon contamination is a general problem of under-vacuum optics submitted to high fluence. In soft X-ray beamlines carbon deposit on optics is known to absorb and scatter radiation close to the C K-edge (280â
eV), forbidding effective measurements in this spectral region. Here the observation of strong reflectivity losses is reported related to carbon deposition at much higher energies around 1000â
eV, where carbon absorptivity is small. It is shown that the observed effect can be modelled as a destructive interference from a homogeneous carbon thin film.
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MEDLINE
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En
Ano de publicação:
2011
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Article