2017
DOI: 10.1088/1748-0221/12/11/c11007
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Development of compact Compton camera for 3D image reconstruction of radioactive contamination

Abstract: A: The Fukushima Daiichi Nuclear Power Station (FDNPS), operated by Tokyo Electric Power Company Holdings, Inc., went into meltdown after the large tsunami caused by the Great East Japan Earthquake of March 11, 2011. Very large amounts of radionuclides were released from the damaged plant. Radiation distribution measurements inside FDNPS buildings are indispensable to execute decommissioning tasks in the reactor buildings. We have developed a compact Compton camera to measure the distribution of radioactive co… Show more

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Cited by 20 publications
(11 citation statements)
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“…The intensity described by the color bars represents the degree of overlap of the Compton cones. In accordance with the principle of the Compton camera, we can find the hotspot at the intersection point of the Compton cones [9]. The count rates in the scatterer and the absorber of the gamma-ray sensor were 5 and 7 kcps, respectively.…”
Section: Drawing Hotspot Image On 3-d Structural Model Of Inside the mentioning
confidence: 63%
See 1 more Smart Citation
“…The intensity described by the color bars represents the degree of overlap of the Compton cones. In accordance with the principle of the Compton camera, we can find the hotspot at the intersection point of the Compton cones [9]. The count rates in the scatterer and the absorber of the gamma-ray sensor were 5 and 7 kcps, respectively.…”
Section: Drawing Hotspot Image On 3-d Structural Model Of Inside the mentioning
confidence: 63%
“…The specifications of our Compton camera are described in detail in Refs. [3,9]. The performance of the Compton camera used for the demonstration test is also shown in Table A1 (see Appendix).…”
Section: Methodsmentioning
confidence: 99%
“…Methodology. The 3D position of a radiation source using a Compton camera has been already determined in simulations and experiments [6,7]. The Compton camera measures radioactive substances from multiple viewpoints, and the Compton cones are projected onto a 3D space.…”
Section: Three-dimensional Gamma-ray Imaging Using Sfm With a Freely Moving Compton Cameramentioning
confidence: 99%
“…From this information, we can calculate the scattering angle of the gamma rays, which is necessary for drawing the Compton cone. The intensity of the image drawn by the Compton cone depends on the direction of the constructed Compton cone, because the detection efficiency of a coincidence event between the scatterer and absorber depends on the incident direction of the gamma rays [7].…”
Section: Three-dimensional Gamma-ray Imaging Using Sfm With a Freely Moving Compton Cameramentioning
confidence: 99%
“…To compensate for this angular dependence on detection efficiency, Compton cones with high intensity were drawn under large-angle conditions. A detailed description of this correction method can be found in the literature [14].…”
Section: Remote Radiation Imaging Systemmentioning
confidence: 99%