Method and apparatus for measuring incombustible content of coal mine dust using gamma-ray backscatter
Abstract
Method and apparatus for measuring incombustible content of particulate material, particularly coal mine dust, includes placing a sample of the particulate material in a container to define a pair of angularly oriented surfaces of the sample, directing an incident gamma-ray beam from a radiation source at one surface of the sample and detecting gamma-ray backscatter from the other surface of the sample with a radiation detector having an output operating a display to indicate incombustible content of the sample. The positioning of the source and detector along different surfaces of the sample permits the depth of the scattering volume defined by intersection of the incident beam and a detection cone from the detector to be selected such that variations in scattered radiation produced by variations in density of the sample are compensated by variations in the attenuation of the incident beam and the gamma-ray backscatter.
- Inventors:
-
- Copan, OK
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- OSTI Identifier:
- 862657
- Patent Number(s):
- 3983392
- Assignee:
- United States of America as represented by United States Energy (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; apparatus; measuring; incombustible; content; coal; mine; dust; gamma-ray; backscatter; particulate; material; particularly; placing; sample; container; define; pair; angularly; oriented; surfaces; directing; incident; beam; radiation; source; surface; detecting; detector; output; operating; display; indicate; positioning; permits; depth; scattering; volume; defined; intersection; detection; cone; selected; variations; scattered; produced; density; compensated; attenuation; volume defined; particulate material; radiation detector; radiation source; incident beam; scattered radiation; radiation produced; coal mine; measuring incombustible; mine dust; incombustible content; incident gamma; detecting gamma; /378/
Citation Formats
Armstrong, Frederick E. Method and apparatus for measuring incombustible content of coal mine dust using gamma-ray backscatter. United States: N. p., 1976.
Web.
Armstrong, Frederick E. Method and apparatus for measuring incombustible content of coal mine dust using gamma-ray backscatter. United States.
Armstrong, Frederick E. Tue .
"Method and apparatus for measuring incombustible content of coal mine dust using gamma-ray backscatter". United States. https://www.osti.gov/servlets/purl/862657.
@article{osti_862657,
title = {Method and apparatus for measuring incombustible content of coal mine dust using gamma-ray backscatter},
author = {Armstrong, Frederick E},
abstractNote = {Method and apparatus for measuring incombustible content of particulate material, particularly coal mine dust, includes placing a sample of the particulate material in a container to define a pair of angularly oriented surfaces of the sample, directing an incident gamma-ray beam from a radiation source at one surface of the sample and detecting gamma-ray backscatter from the other surface of the sample with a radiation detector having an output operating a display to indicate incombustible content of the sample. The positioning of the source and detector along different surfaces of the sample permits the depth of the scattering volume defined by intersection of the incident beam and a detection cone from the detector to be selected such that variations in scattered radiation produced by variations in density of the sample are compensated by variations in the attenuation of the incident beam and the gamma-ray backscatter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 28 00:00:00 EDT 1976},
month = {Tue Sep 28 00:00:00 EDT 1976}
}