Sideband structure of sound from a harmonic point source scattered by a rough surface moving over an upward‐refracting ocean

1977 ◽  
Vol 61 (2) ◽  
pp. 378-389 ◽  
Author(s):  
F. M. Labianca ◽  
E. Y. Harper
Keyword(s):  
Point Source ◽  
Rough Surface

The intensity of the field generated by a point source and reflected from a rough surface

2012 ◽  
Vol 58 (2) ◽  
pp. 139-146 ◽  
Author(s):  
G. A. Maximov ◽  
V. A. Larichev ◽  
K. V. Khoroshenkov
Keyword(s):  
Point Source ◽  
Rough Surface

XRMF applications of a monolithic, polycapillary, focusing x-ray optic

1996 ◽  
Vol 54 ◽  
pp. 240-241
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla
Keyword(s):  
Trace Elements ◽  
Point Source ◽  
Focal Spot ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Focal Distance ◽  
Spot Diameter ◽  
X Ray ◽  
Focal Spot Diameter

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.

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