| Paper | Title | Page |
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| THPS064 | Application of X-band 3.95 MeV Linac X-ray Source for On-site Bridge Inspection | 3571 |
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We developed an X-ray non-destructive (NDT) system for on-site bridge inspection. A portable X-band (9.3-12 GHz) 3.95MeV linear accelerator (linac) has been developed for this system. The system consists of X-ray of 62kg without the target collimeter of 80kg, the RF power source of 62kg and other utility box of 116kg. For the onsite investigation, a flexible waveguide is used for this linac. And the linac is a point X-ray source. For X-ray detection, we chose 8-inch square size scintillation type flat panel detector. The spatial resolution of the detector is as high as 0.2mm, which is manufactured by Perkin Elmer Co. Cd2O2S:Tb is used for the scintillator crystal. The capable radiation energy range is 40keV to 15MeV. In order to realize quick inspection for a bridge, remote control robot which handles and compact X-ray source and detector are desired. Therefore, we developed 3D location system for this robot. The locating system is realized with image processing with its camera. For the operation, stereoscopic radiographic image is taken and analyzed, and computed tomography (CT) image analysis is taken for detailed inspection.
Non-destructive test (NDT) , X-ray Source, X-band, Linac, Detector, Computed Tomography (CT). |
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| THPS065 | Upgraded X-band 950 KeV Linac X-ray Source for On-site Inspection at Petrochemical Complex | 3574 |
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| Abstract―Our portable X-band (9.3GHz) 950KeV linac has been successfully upgraded. The problems of RF power oscillation, beam current oscillation and reduction and finally lack of X-ray intensity were solved by replacing the axial coupling cavities with the side-coupled ones. Designed X-ray dose rate of 0.05 Sv/min@1m is going to be achieved. Length of the accelerating tube is reduced to less than 25 cm. X-ray source part with the local radiation shielding is connected by the flexible waveguide with the box of the 300 kW magnetron and cooling unit. The total system consists of the three suit-case-size units, the last of which is one for the electric power supply. Even on-line dynamic transmission imaging is available by using the high intensity X-ray camera. Demonstration of the measurement of wall thinning of metal pipes with thick thermal shielding is under way. Updated measurement results will be presented. KEYWORDS: portable X-band linac X-ray source, on-site high energy X-ray inspection, petrochemical complex | ||