Surface roughness effects on cylindrical grazing incidence x‐ray optics for transition radiation

1993 ◽  
Vol 74 (9) ◽  
pp. 5320-5326 ◽  
Author(s):  
A. H. Ho ◽  
M. A. Piestrup ◽  
R. M. Silzer ◽  
D. M. Skopik
Keyword(s):  
Surface Roughness ◽  
Transition Radiation ◽  
Grazing Incidence ◽  
Roughness Effects ◽  
Ray Optics ◽  
X Ray

Effect of surface roughness of substrate on grazing incidence x-ray optics

1998 ◽  
Author(s):  
Keisuke Tamura ◽  
Koujun Yamashita ◽  
Hideyo Kunieda ◽  
Yuzuru Tawara ◽  
Kazutoshi Haga ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Grazing Incidence ◽  
Ray Optics ◽  
X Ray ◽  
Effect Of Surface

Zone plates for x-ray optics at grazing incidence angles

1996 ◽  
Vol 29 (1) ◽  
pp. 129-132 ◽  
Author(s):  
I A Schelokov ◽  
Yu A Basov
Keyword(s):  
Grazing Incidence ◽  
Ray Optics ◽  
X Ray ◽  
Zone Plates

Influence of Surface Roughness on the Quality of Data Obtained by Pseudo-Grazing Incidence X-Ray Diffraction

2006 ◽  
Vol 514-516 ◽  
pp. 1618-1622 ◽  
Author(s):  
Maria José Marques ◽  
J.C.P. Pina ◽  
A. Morão Dias
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Stress Gradient ◽  
Roughness Parameter ◽  
Diffraction Method ◽  
Grazing Incidence ◽  
Bragg Diffraction ◽  
X Ray Diffraction ◽  
Residual Surface Stress ◽  
X Ray

The conventional Bragg diffraction geometry, normally used to characterize the residual surface stress state, it is not suitable to evaluate surface treated materials and thin films. The X-ray path lengths through a surface layer or thin film are too short to produce adequate diffraction intensities in relation to the bulk or the substrate. Another limitation of the conventional technique appears when a residual stress gradient is present in the irradiated surface. The technique only enables the evaluation of the mean value of this gradient. In these cases, a recently proposed Pseudo-Grazing Incident X-ray Diffraction method would be better applicable. In this study, the Pseudo-Grazing Incidence X-ray Diffraction is applied to characterize the residual stress depth profiles of several AISI 4140 samples, which were prepared, by mechanical polishing and grinding, in order to present different surface roughness parameters, Ra. The experimental results lead to the conclusion that the surface roughness limits the application of the Pseudo-Grazing Incidence methodology to a minimum X-ray incident angle. This angle is the one that enables a mean X-ray penetration depth with the same order of magnitude of the sample surface roughness parameter, Ra.

Replicated metal mirrors for grazing-incidence x-ray optics

1993 ◽  
Author(s):  
Paolo Conconi ◽  
Oberto Citterio ◽  
Mauro Ghigo ◽  
Francesco Mazzoleni
Keyword(s):  
Grazing Incidence ◽  
Ray Optics ◽  
X Ray

The Use of Ti, Si, C, Be and LiF in Soft X-Ray Optics

1988 ◽  
Vol 102 ◽  
pp. 303
Author(s):  
A.V. Vinogradov
Keyword(s):  
Normal Incidence ◽  
Grazing Incidence ◽  
X Rays ◽  
Optical Elements ◽  
Ray Optics ◽  
X Ray

SummaryTi, Si, C, Be and LiF have been studied as coatings for normal incidence (multilayers) and grazing incidence (steering many-fold reflection mirrors) optical elements. The multilayers have been tested with soft (130+250 Å and hard (1.54 Å) X-rays. From these measurements the multilayer parameters have been deduced.The carbon and lithium fluorine steering mirrors showed the reflection of 10+60% for the turning angles of 30 and 45 degrees and two wavelengths of 44.7 Å and 67.6 Å. The perspectives of other materials are also discussed.

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