Pulse Pileup Recovery for Energy Dispersive Spectroscopy

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 22402
Amount: $404,257.00
Phase: Phase II
Program: SBIR
Awards Year: 1997
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
3500 Westgate Drive, Suite 403, Durham, NC, 27707
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Scott D. Davilla
 (919) 489-1757
Business Contact
Phone: () -
Research Institution
Quantitative energy dispersive spectroscopy (EDS) x-ray microanalysis provides important information regarding the distribution of elements within a biological sample. The low elemental concentrations in biological specimens require dwell times of several seconds livetime to obtain spectra with significant statistical information, especially for quantitative EDS imaging. Deadtime caused by the rejection of pulse pileup counts is a major limiting factor of x-ray collection during the acquisition of x-ray spectra. The dwell time can be reduced by 25% or more (depending upon beam current conditions) by recovering rejected pulse pileup counts. This significant reduction in deadtime would increase efficiency (both in cost and time) for the collection of quantitative x- ray data and images from biological samples; such improved instrumentation is not currently available. In Phase I, the real-time recovery of pulse pileup counts will be examined using current analog/digital electronics and a digital signal processor to establish the most effective (cost and performance) method. The Phase II goals will be the low cost realization of a new form of pulse pileup-free microanalyzer based on the Phase I results and its application to quantitative x-ray imaging and data acquisition of biological samples.

* Information listed above is at the time of submission. *

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