Method and apparatus for digitally based high speed x-ray spectrometer for direct coupled use with continuous discharge preamplifiers
Abstract
A high speed, digitally based, signal processing system which accepts directly coupled input data from a detector with a continuous discharge type preamplifier and produces a spectral analysis of the x-rays illuminating the detector. The system's principal elements are an analog signal conditioning section, a combinatorial logic section which implements digital triangular filtering and pileup inspection, and a microprocessor which accepts values captured by the logic section and uses them to compute x-ray energy values. Operating without pole-zero correction, the system achieves high resolution by capturing, in conjunction with each peak value from the digital filter, an associated value of the unfiltered signal, and using this latter signal to correct the former for errors which arise from its local slope terms. This correction greatly reduces both energy resolution degradation and peak centroid shifting in the output spectrum as a function of input count rate. When the noise of this correction is excessive, a modification allows two filtered averages of the signal to be captured and a corrected peak amplitude computed therefrom.
- Inventors:
-
- 1300 Mills St., Menlo Park, CA 94025
- Issue Date:
- Research Org.:
- X-RAY INSTRUMENTATION ASSOC
- OSTI Identifier:
- 871673
- Patent Number(s):
- 5774522
- Assignee:
- Warburton, William K. (1300 Mills St., Menlo Park, CA 94025)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
- DOE Contract Number:
- FG03-92ER81311
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; apparatus; digitally; based; speed; x-ray; spectrometer; direct; coupled; continuous; discharge; preamplifiers; signal; processing; accepts; directly; input; data; detector; type; preamplifier; produces; spectral; analysis; x-rays; illuminating; principal; elements; analog; conditioning; section; combinatorial; logic; implements; digital; triangular; filtering; pileup; inspection; microprocessor; values; captured; compute; energy; operating; pole-zero; correction; achieves; resolution; capturing; conjunction; peak; value; filter; associated; unfiltered; latter; correct; former; errors; arise; local; slope; terms; greatly; reduces; degradation; centroid; shifting; output; spectrum; function; count; rate; noise; excessive; modification; allows; filtered; averages; corrected; amplitude; computed; therefrom; x-ray spectrometer; energy resolution; digitally based; greatly reduces; output spectrum; direct coupled; spectral analysis; signal processing; analog signal; x-ray energy; peak value; count rate; input data; signal conditioning; speed x-ray; peak amplitude; energy values; directly coupled; filtered signal; signal process; combinatorial logic; greatly reduce; x-rays illuminating; discharge type; /378/250/
Citation Formats
Warburton, William K. Method and apparatus for digitally based high speed x-ray spectrometer for direct coupled use with continuous discharge preamplifiers. United States: N. p., 1998.
Web.
Warburton, William K. Method and apparatus for digitally based high speed x-ray spectrometer for direct coupled use with continuous discharge preamplifiers. United States.
Warburton, William K. Tue .
"Method and apparatus for digitally based high speed x-ray spectrometer for direct coupled use with continuous discharge preamplifiers". United States. https://www.osti.gov/servlets/purl/871673.
@article{osti_871673,
title = {Method and apparatus for digitally based high speed x-ray spectrometer for direct coupled use with continuous discharge preamplifiers},
author = {Warburton, William K},
abstractNote = {A high speed, digitally based, signal processing system which accepts directly coupled input data from a detector with a continuous discharge type preamplifier and produces a spectral analysis of the x-rays illuminating the detector. The system's principal elements are an analog signal conditioning section, a combinatorial logic section which implements digital triangular filtering and pileup inspection, and a microprocessor which accepts values captured by the logic section and uses them to compute x-ray energy values. Operating without pole-zero correction, the system achieves high resolution by capturing, in conjunction with each peak value from the digital filter, an associated value of the unfiltered signal, and using this latter signal to correct the former for errors which arise from its local slope terms. This correction greatly reduces both energy resolution degradation and peak centroid shifting in the output spectrum as a function of input count rate. When the noise of this correction is excessive, a modification allows two filtered averages of the signal to be captured and a corrected peak amplitude computed therefrom.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 30 00:00:00 EDT 1998},
month = {Tue Jun 30 00:00:00 EDT 1998}
}
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