Steady infiltration from buried point source into heterogeneous cross-anisotropic unsaturated soil

2004 ◽  
Vol 28 (10) ◽  
pp. 1033-1055 ◽  
Author(s):  
G. J. Chen ◽  
D. Gallipoli
Keyword(s):  
Point Source ◽  
Unsaturated Soil ◽  
Buried Point

Daylight seismic imaging from a buried point source

2005 ◽  
Author(s):  
Kazuya Shiraishi ◽  
Mieko Tanaka ◽  
Toshifumi Matsuoka ◽  
Toshiyuki Matsuoka ◽  
Tanoue Masayoshi ◽  
...  
Keyword(s):  
Point Source ◽  
Seismic Imaging ◽  
Buried Point

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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