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Title: High resolution, high rate X-ray spectrometer

Abstract

A pulse processing system (10) for use in an X-ray spectrometer in which a ain channel pulse shaper (12) and a fast channel pulse shaper (13) each produce a substantially symmetrical triangular pulse (f, p) for each event detected by the spectrometer, with the pulse width of the pulses being substantially independent of the magnitude of the detected event and with the pulse width of the fast pulses (p) being substantially shorter than the pulse width of the main channel pulses (f). A pile-up rejector circuit (19) allows output pulses to be generated, with amplitudes linearly related to the magnitude of the detected events, whenever the peak of a main channel pulse (f) is not affected by a preceding or succeeding main channel pulse, while inhibiting output pulses wherein peak magnitudes of main channel pulses are affected by adjacent pulses. The substantially symmetrical triangular main channel pulses (f) are generated by the weighted addition (27-31) of successive RC integrations (24, 25, 26) of an RC differentiated step wave (23). The substantially symmetrical triangular fast channel pulses (p) are generated by the RC integration ( 43) of a bipolar pulse (o) in which the amplitude of the second half is 1/emore » that of the first half, with the RC time constant of integration being equal to one-half the width of the bipolar pulse.« less

Inventors:
 [1];  [2]
  1. Lafayette, CA
  2. Pinole, CA
Issue Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
866218
Patent Number(s):
4658216
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03K - PULSE TECHNIQUE
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
resolution; rate; x-ray; spectrometer; pulse; processing; 10; channel; shaper; 12; fast; 13; produce; substantially; symmetrical; triangular; event; detected; width; pulses; independent; magnitude; shorter; main; pile-up; rejector; circuit; 19; allows; output; generated; amplitudes; linearly; related; events; whenever; peak; affected; preceding; succeeding; inhibiting; magnitudes; adjacent; weighted; addition; 27-31; successive; integrations; 24; 25; 26; differentiated; step; wave; 23; integration; 43; bipolar; amplitude; half; time; constant; equal; one-half; x-ray spectrometer; channel pulse; bipolar pulse; output pulses; pulse shape; output pulse; pulse width; substantially independent; main channel; time constant; pulse shaper; substantially symmetrical; pulse processing; detected event; detected events; channel pulses; linearly related; fast channel; /327/

Citation Formats

Goulding, Frederick S, and Landis, Donald A. High resolution, high rate X-ray spectrometer. United States: N. p., 1987. Web.
Goulding, Frederick S, & Landis, Donald A. High resolution, high rate X-ray spectrometer. United States.
Goulding, Frederick S, and Landis, Donald A. Thu . "High resolution, high rate X-ray spectrometer". United States. https://www.osti.gov/servlets/purl/866218.
@article{osti_866218,
title = {High resolution, high rate X-ray spectrometer},
author = {Goulding, Frederick S and Landis, Donald A},
abstractNote = {A pulse processing system (10) for use in an X-ray spectrometer in which a ain channel pulse shaper (12) and a fast channel pulse shaper (13) each produce a substantially symmetrical triangular pulse (f, p) for each event detected by the spectrometer, with the pulse width of the pulses being substantially independent of the magnitude of the detected event and with the pulse width of the fast pulses (p) being substantially shorter than the pulse width of the main channel pulses (f). A pile-up rejector circuit (19) allows output pulses to be generated, with amplitudes linearly related to the magnitude of the detected events, whenever the peak of a main channel pulse (f) is not affected by a preceding or succeeding main channel pulse, while inhibiting output pulses wherein peak magnitudes of main channel pulses are affected by adjacent pulses. The substantially symmetrical triangular main channel pulses (f) are generated by the weighted addition (27-31) of successive RC integrations (24, 25, 26) of an RC differentiated step wave (23). The substantially symmetrical triangular fast channel pulses (p) are generated by the RC integration ( 43) of a bipolar pulse (o) in which the amplitude of the second half is 1/e that of the first half, with the RC time constant of integration being equal to one-half the width of the bipolar pulse.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

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