X-ray or gamma ray systems or devices – Specific application – Fluorescence
Reexamination Certificate
2008-04-24
2010-11-23
Ho, Allen C. (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Fluorescence
C378S044000, C378S198000
Reexamination Certificate
active
07839969
ABSTRACT:
A method and device for detecting mercury or other material deposits on an inner surface of an enclosed passage are provided. The device includes a detection unit that is adapted to be transported through the passage, and the detection unit includes a radiation source and an x-ray fluorescence detector. The radiation source is configured to emit a radiation emission toward the inner surface of the passage to excite a portion of the inner surface, and the x-ray fluorescence detector is configured to detect a resulting x-ray emission from the portion of the inner surface to identify a material deposit on the inner surface. The detection unit can identify material deposits at successive positions along a length of the passage and thereby generate a plurality of data points, each data point providing an indication of a material deposit existence for a corresponding position along the length of the passage.
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Gallup Darrell Lynn
Spurrell Christopher Henry
Chevron U.S.A. Inc.
Ho Allen C.
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