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Method and apparatus for improving resolution in spectrometers processing output steps from non-ideal signal sources

United States Patent

July 1, 2003
View the Complete Patent at the US Patent & Trademark Office
A method and apparatus for processing step-like output signals generated by non-ideal, nominally single-pole ("N-1P") devices responding to possibly time-varying, pulse-like input signals of finite duration, wherein the goal is to recover the integrated areas of the input signals. Particular applications include processing step-like signals generated by detector systems in response to absorbed radiation or particles and, more particularly, to digitally processing such step-like signals in high resolution, high rate gamma ray (.gamma.-ray) spectrometers with resistive feedback preamplifiers connected to large volume germanium detectors. Superconducting bolometers can be similarly treated. The method comprises attaching a set of one or more filters to the device's (e.g., preamplifier's) output, capturing a correlated multiple output sample from the filter set in response to a detected event, and forming a weighted sum of the sample values to accurately recover the total area (e.g., charge) of the detected event.
Warburton; William K. (Menlo Park, CA), Momayezi; Michael (San Francisco, CA)
Warburton; William K. (Menlo Park, CA)
09/ 643,705
August 21, 2000
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT The U.S. Government has rights in this invention pursuant to Contract No. DE-FG03-97ER82510 awarded by the Department of Energy.