On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources
| Autor: | Eiji Tanabe, Takeshi Fujiwara, Joichi Kusano, Cuixiang Pei, Masashi Yamamoto, Katsuhiro Dobashi, Mitsuru Ueaska, Wenjing Wu, Naoki Nakamura, Yoshitomi Kimura, Itaru Miura, Masahiro Ishida, Hidetaka Honma, Yukiya Hattori, Seiji Ohya |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 47:234008 |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/0953-4075/47/23/234008 |
| Popis: | We have developed and upgraded portable 950 keV/3.95 MeV X-band (9.3 GHz) linac x-ray sources for on-site nondestructive testing (NDT) for social and industrial infrastructures. We integrated the hardware devices as well as software systems. For the hardware, we established all designed parameters including x-ray intensities of 0.05/2 Gy min−1 at 1 m for 950 keV/3.95 MeV systems, respectively. Concerning the software, we adopted the wavelet analysis for enhanced image contrast and partial angle computed tomography (CT) for a small region of interest. The wavelet analysis is effective to reduce scattered low energy x-ray noise in addition to using physical filters and collimators. The partial CT is inevitable to reconstruct an inner reinforced iron tube in concrete. We successfully performed on-site inspection three times, namely of a nitrogen acid distillation tower, a reinforced concrete pier and a large sample cut from a bridge. We obtained the x-ray images of the inner tube, determined the sizes of reinforced iron parts and evaluated the mechanical tolerance. Moreover, we are developing a new x-ray camera specified for MeV x-rays used for NDT of heavy objects. Then, our system will become a self-consisting and specialized high energy x-ray on-site inspection system. We are going to promote an application to NDT of social and industrial infrastructures in Japan and around the world. |
| Databáze: | OpenAIRE |
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