NASA NTRS · 19890000084
Plug Would Collimate X Rays
Abstract
Device creates narrow, well-defined beam for radiographic measurements of thickness. Cylindrical plug collimates and aligns X rays with respect to through holes in parts. Helps in determination of wall thickness by radiography. Lead absorbs X rays that do not pass axially through central hole. Lead/vinyl seals prevent off-axis rays from passing along periphery of plug.
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Anders, Jeffrey E., Adams, James F.. 1989-02-01. Plug Would Collimate X Rays. https://ntrs.nasa.gov/citations/19890000084
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