Obtaining material identification with cosmic ray radiography

Morris, C. L.; Borozdin, K.; Bacon, Jeffrey; Chen, Elliott; Lukić, Zarija; Milner, E.C.; Miyadera, Haruo; Perry, J.; Schwellenbach, David; Aberle, Derek; Dreesen, Wendi; Green, J. Andrew; McDuff, George G.; Nagamine, K.; Sossong, M.; Spore, Candace; Toleman, Nathan

doi:10.1063/1.4766179

Cited by 33 publications

(24 citation statements)

References 14 publications

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“…In the LANL experiment, 16,17) multiplanes of drift tubes are used for the PSDs. There, the detectors measured position and angle to precisions of 400 µm (FWHM) and approximately 2 mrad, respectively.…”

Section: A Detailed Description Of Crm Transmission Radiographymentioning

confidence: 99%

Radiography with cosmic-ray and compact accelerator muons; Exploring inner-structure of large-scale objects and landforms

Nagamine

2016

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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Cosmic-ray muons (CRM) arriving from the sky on the surface of the earth are now known to be used as radiography purposes to explore the inner-structure of large-scale objects and landforms, ranging in thickness from meter to kilometers scale, such as volcanic mountains, blast furnaces, nuclear reactors etc. At the same time, by using muons produced by compact accelerators (CAM), advanced radiography can be realized for objects with a thickness in the sub-millimeter to meter range, with additional exploration capability such as element identification and bio-chemical analysis. In the present report, principles, methods and specific research examples of CRM transmission radiography are summarized after which, principles, methods and perspective views of the future CAM radiography are described.

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Section: A Detailed Description Of Crm Transmission Radiographymentioning

confidence: 99%

Radiography with cosmic-ray and compact accelerator muons; Exploring inner-structure of large-scale objects and landforms

Nagamine

2016

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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“…The scattering angle distribution for each pixel is fitted to obtain the average radiation length by using a recently developed multigroup description of the muon energy spectrum. 26 The angular distributions are fitted with a sum of Gaussians, with amplitudes corresponding to the distribution of muon energies and the widths depending on the amount and composition of material. The spectrum is calibrated to the integrated radiation length expected for a muon crossing the UNMRR.…”

Section: B Image Reconstruction Methodsmentioning

confidence: 99%

Imaging a nuclear reactor using cosmic ray muons

Perry

Azzouz

Bacon

et al. 2013

Journal of Applied Physics

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The passage of muons through matter is dominated by the Coulomb interaction with electrons and nuclei. The muon interaction with electrons leads to continuous energy loss and stopping of the muons. The muon interaction with nuclei leads to angular diffusion. We present experimental images of a nuclear reactor, the AGN-201M reactor at the University of New Mexico, using data measured with a particle tracker built from a set of sealed drift tubes. The data are compared with a geant4 model. In both the data and simulation, we identify specific regions corresponding to elements of the reactor structure, including its core, moderator, and shield.

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“…By measuring the positional distribution of the intensity attenuation of the penetrating cosmic-rays, the inner-structure of the world's largest blast furnaces of the Nippon Steel Corporation have been studied during a time of its full operation [5], based upon the experiences of radiography of the volcanic mountains [4,6]. Investigations of the inner status of the damaged Fukushima nuclear reactors are in progress by using multiple-scattering method of cosmic-ray muons [7,8] along with the transmission radiography [9]. However, it is hard to detect chemical as well as physical properties of steels by transmission or multiple scattering methods.…”

Section: Introductionmentioning

confidence: 99%

Development of cosmic-ray muon spin rotation radiography to investigate chemical and physical states of steels in large-scale architecture

Fujimaki¹,

Nagamine²,

Torikai³

et al. 2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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We propose a cosmic-ray muon spin rotation radiography to investigate physical and chemical status of steels in large-scale architectures based on the experimental results obtained for Fe and concrete by using cosmic-ray and accelerator muons. Spin polarized positive muons contained in the cosmic-rays were stopped in the Fe plates provide a characteristic spin rotation signal of decay positrons. Signals of decay electrons from negative muons stopped in Fe are separated from those of decay positrons, by nature of their different lifetimes in the samples. After subtraction of decay electrons, we have successfully extracted muon spin rotation with 47.2 ± 0.7 MHz in frequency and 8.7 ± 4.6 μs -1 in relaxation rate. These values are consistent with those obtained from reference experiment using intensive muons provided by an accelerator, verifying validity of analysis. This method is quite promising to investigate steels at near-surface (20 cm thick from the surface).

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Obtaining material identification with cosmic ray radiography

Cited by 33 publications

References 14 publications

Radiography with cosmic-ray and compact accelerator muons; Exploring inner-structure of large-scale objects and landforms

Radiography with cosmic-ray and compact accelerator muons; Exploring inner-structure of large-scale objects and landforms

Imaging a nuclear reactor using cosmic ray muons

Development of cosmic-ray muon spin rotation radiography to investigate chemical and physical states of steels in large-scale architecture

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