High-resolution neutron and X-ray imaging of granular materials

Felix H. Kim, Dayakar Penumadu, Jens Gregor, Nikolay Kardjilov, Ingo Manke

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

High spatial resolution ( ~13:7 mm=pixel) neutron tomography was performed on partially water-saturated compacted silica sand specimens with two different grain morphologies (round and angular) at Helmholtz Zentrum Berlin using cold neutrons at the cold neutron radiography and tomography beam line. A specimen mixed with heavy water was imaged for contrast comparison purposes. Microfocus X-ray imaging was also performed on these specimens with slightly higher resolution ( ~11:2 mm=pixel) using geometric magnification to locate the solid phase (silica particle boundaries) more precisely. Image processing was performed to remove unwanted gammas detected because of the gadox scintillator used for the high-resolution neutron imaging system. The visualization of solid, gas, and liquid phases for different grain morphologies is presented at the grain level. Using dual-modal contrast possible from simultaneous use of neutrons and X-rays, the authors introduce, for the first time, an improved ability to distinguish solid silica, liquid water, and gas phases. Quantitative analysis using three-dimensional tomography data is demonstrated for obtaining void ratio, void percentage variation over the height, and particle size distribution.

Original languageEnglish (US)
Pages (from-to)715-723
Number of pages9
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume139
Issue number5
DOIs
StatePublished - Jul 9 2013

Fingerprint

Granular materials
tomography
Neutrons
silica
Tomography
Imaging techniques
X rays
pixel
radiography
liquid
Pixels
void ratio
Silica
Neutron radiography
Silica sand
gas
image processing
Heavy water
water
void

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Geotechnical Engineering and Engineering Geology

Cite this

High-resolution neutron and X-ray imaging of granular materials. / Kim, Felix H.; Penumadu, Dayakar; Gregor, Jens; Kardjilov, Nikolay; Manke, Ingo.

In: Journal of Geotechnical and Geoenvironmental Engineering, Vol. 139, No. 5, 09.07.2013, p. 715-723.

Research output: Contribution to journalArticle

Kim, Felix H. ; Penumadu, Dayakar ; Gregor, Jens ; Kardjilov, Nikolay ; Manke, Ingo. / High-resolution neutron and X-ray imaging of granular materials. In: Journal of Geotechnical and Geoenvironmental Engineering. 2013 ; Vol. 139, No. 5. pp. 715-723.
@article{c707e754d4cc47bb92eda01157d179a6,
title = "High-resolution neutron and X-ray imaging of granular materials",
abstract = "High spatial resolution ( ~13:7 mm=pixel) neutron tomography was performed on partially water-saturated compacted silica sand specimens with two different grain morphologies (round and angular) at Helmholtz Zentrum Berlin using cold neutrons at the cold neutron radiography and tomography beam line. A specimen mixed with heavy water was imaged for contrast comparison purposes. Microfocus X-ray imaging was also performed on these specimens with slightly higher resolution ( ~11:2 mm=pixel) using geometric magnification to locate the solid phase (silica particle boundaries) more precisely. Image processing was performed to remove unwanted gammas detected because of the gadox scintillator used for the high-resolution neutron imaging system. The visualization of solid, gas, and liquid phases for different grain morphologies is presented at the grain level. Using dual-modal contrast possible from simultaneous use of neutrons and X-rays, the authors introduce, for the first time, an improved ability to distinguish solid silica, liquid water, and gas phases. Quantitative analysis using three-dimensional tomography data is demonstrated for obtaining void ratio, void percentage variation over the height, and particle size distribution.",
author = "Kim, {Felix H.} and Dayakar Penumadu and Jens Gregor and Nikolay Kardjilov and Ingo Manke",
year = "2013",
month = "7",
day = "9",
doi = "10.1061/(ASCE)GT.1943-5606.0000809",
language = "English (US)",
volume = "139",
pages = "715--723",
journal = "Journal of Geotechnical and Geoenvironmental Engineering - ASCE",
issn = "1090-0241",
publisher = "American Society of Civil Engineers (ASCE)",
number = "5",

}

TY - JOUR

T1 - High-resolution neutron and X-ray imaging of granular materials

AU - Kim, Felix H.

AU - Penumadu, Dayakar

AU - Gregor, Jens

AU - Kardjilov, Nikolay

AU - Manke, Ingo

PY - 2013/7/9

Y1 - 2013/7/9

N2 - High spatial resolution ( ~13:7 mm=pixel) neutron tomography was performed on partially water-saturated compacted silica sand specimens with two different grain morphologies (round and angular) at Helmholtz Zentrum Berlin using cold neutrons at the cold neutron radiography and tomography beam line. A specimen mixed with heavy water was imaged for contrast comparison purposes. Microfocus X-ray imaging was also performed on these specimens with slightly higher resolution ( ~11:2 mm=pixel) using geometric magnification to locate the solid phase (silica particle boundaries) more precisely. Image processing was performed to remove unwanted gammas detected because of the gadox scintillator used for the high-resolution neutron imaging system. The visualization of solid, gas, and liquid phases for different grain morphologies is presented at the grain level. Using dual-modal contrast possible from simultaneous use of neutrons and X-rays, the authors introduce, for the first time, an improved ability to distinguish solid silica, liquid water, and gas phases. Quantitative analysis using three-dimensional tomography data is demonstrated for obtaining void ratio, void percentage variation over the height, and particle size distribution.

AB - High spatial resolution ( ~13:7 mm=pixel) neutron tomography was performed on partially water-saturated compacted silica sand specimens with two different grain morphologies (round and angular) at Helmholtz Zentrum Berlin using cold neutrons at the cold neutron radiography and tomography beam line. A specimen mixed with heavy water was imaged for contrast comparison purposes. Microfocus X-ray imaging was also performed on these specimens with slightly higher resolution ( ~11:2 mm=pixel) using geometric magnification to locate the solid phase (silica particle boundaries) more precisely. Image processing was performed to remove unwanted gammas detected because of the gadox scintillator used for the high-resolution neutron imaging system. The visualization of solid, gas, and liquid phases for different grain morphologies is presented at the grain level. Using dual-modal contrast possible from simultaneous use of neutrons and X-rays, the authors introduce, for the first time, an improved ability to distinguish solid silica, liquid water, and gas phases. Quantitative analysis using three-dimensional tomography data is demonstrated for obtaining void ratio, void percentage variation over the height, and particle size distribution.

UR - http://www.scopus.com/inward/record.url?scp=84879726412&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879726412&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)GT.1943-5606.0000809

DO - 10.1061/(ASCE)GT.1943-5606.0000809

M3 - Article

VL - 139

SP - 715

EP - 723

JO - Journal of Geotechnical and Geoenvironmental Engineering - ASCE

JF - Journal of Geotechnical and Geoenvironmental Engineering - ASCE

SN - 1090-0241

IS - 5

ER -