950keV, 3.95MeV and 6MeV X-band linacs for nondestructive evaluation and medicine

Uesaka, Mitsuru; Natsui, Takuya; Lee, Kiwoo; Dobashi, Katsuhiro; Yamamoto, Tomohiko; Fujiwara, T.; Zhu, Haito; Demachi, Kazuyuki; Tanabe, Eiji; Yamamoto, Masashi; Nakamura, Naoki; Kusano, Joichi; Higo, T.; Fukuda, Shigeki; Yoshida, Mitsuhiro; Matsumoto, Shûji

doi:10.1016/j.nima.2011.07.026

Cited by 12 publications

(7 citation statements)

References 3 publications

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“…We first constructed the accelerator tube with π/2 mode axial coupling with three π mode cells just after a 20 keV electron gun. We observed an oscillation of electron beam current and low energy electrons by phase slipping for high beam current operation [1]. This is an intrinsic instability of the π mode cells.…”

Section: Kev X-band Electron Linac X-ray Sourcementioning

confidence: 79%

On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources

Ueaska

Dobashi

Fujiwara

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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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.

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Section: Kev X-band Electron Linac X-ray Sourcementioning

confidence: 79%

On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources

Ueaska

Dobashi

Fujiwara

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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“…A higher radio frequency (rf) can therefore provide a higher accelerating gradient, which in turn offers structural compactness. Thus, we decided to use the 11.9942-GHz X-band rf [39] of the Compact Linear Collider (CLIC) [40], although many industrial and medical electron linacs operate at the subharmonic S-band rf [37,41,42].…”

Section: A Design Considerationsmentioning

confidence: 99%

Design of an X -band electron linear accelerator dedicated to decentralized Mo99/Tc
Jang
¹
,
Yamamoto²,
Uesaka
³

2017
Phys. Rev. Accel. Beams
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The most frequently used radionuclide in diagnostic nuclear medicine, 99m Tc, is generally obtained by the decay of its parent radionuclide, 99 Mo. Recently, concerns have been raised over shortages of 99 Mo= 99m Tc, owing to aging of the research reactors which have been supplying practically all of the global demand for 99 Mo in a centralized fashion. In an effort to prevent such 99 Mo= 99m Tc supply disruption and, furthermore, to ameliorate the underlying instability of the centralized 99 Mo= 99m Tc supply chain, we designed an X-band electron linear accelerator which can be distributed over multiple regions, whereby 99 Mo= 99m Tc can be supplied with improved accessibility. The electron beam energy was designed to be 35 MeV, at which an average beam power of 9.1 kW was calculated by the following beam dynamics analysis. Subsequent radioactivity modeling suggests that 11 of the designed electron linear accelerators can realize self-sufficiency of 99 Mo= 99m Tc in Japan.

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“…Also, I have added, deleted, and moved explanations where appropriate. The details are provided in (1), (2), and (3) of chapter 3.…”

Section: Answer (Hiroyuki Toyokawa)mentioning

confidence: 99%

Application of laser Compton photon beam to nondestructive tests

Toyokawa

2015

Synthesiology English edition

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This paper consists of four chapters. In chapter 2, technical issues will be discussed. Chapter 3 discusses the process of selection and integration of technologies for bridging, in correspondence to (1) ~ (3) listed above. Chapter 4 reflects on the process of selection and integration of the elemental technologies in correspondence to (4), and discusses the efforts spent to achieve the goals and results. 2 Technical issues about laser Compton scattering There are attractive technologies in nuclear physics and elementary particle physics especially in radiation measurement technologies. They are highly sophisticated, and can be applied to industrial technology with some modifications. We applied a method for measuring cross-sections of atoms and nuclear reactions to nondestructive testing via industrial radiography. Industrial radiography is an important technique in improving reliability of industrial products such as automobiles, aircraft, rockets, sintered materials, cast products, and electronic substrates. [1] A high-energy X-ray computerized tomography (CT) system using an electron accelerator that is capable of radiographing a whole engine block at spatial resolution of 2~3 mm has been developed. In infrastructure diagnosis, the technology to inspect roadbeds and bridges on site using a portable electron accelerator has been developed recently. [2] A nondestructive and highly precise method for visualizing reinforcing steel-bars and cracks in concrete structure is strongly demanded in our society.

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950keV, 3.95MeV and 6MeV X-band linacs for nondestructive evaluation and medicine

Cited by 12 publications

References 3 publications

On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources

On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources

Design of an X -band electron linear accelerator dedicated to decentralized Mo99/Tc
Jang
¹
,
Yamamoto²,
Uesaka
³

2017
Phys. Rev. Accel. Beams
Self Cite
10
0
2
0
View full text Add to dashboard Cite

Application of laser Compton photon beam to nondestructive tests

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950keV, 3.95MeV and 6MeV X-band linacs for nondestructive evaluation and medicine

Cited by 12 publications

References 3 publications

On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources

On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources

Design of an X -band electron linear accelerator dedicated to decentralized Mo99/TcJang1, Yamamoto2, Uesaka3 2017Phys. Rev. Accel. BeamsSelf Cite10020View full textAdd to dashboardCite

Application of laser Compton photon beam to nondestructive tests

Contact Info

Product

Resources

About

Design of an X -band electron linear accelerator dedicated to decentralized Mo99/Tc
Jang
¹
,
Yamamoto²,
Uesaka
³

2017
Phys. Rev. Accel. Beams
Self Cite
10
0
2
0
View full text Add to dashboard Cite