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Journal Articles

Roundness and straightness measurement of ceramic beam ducts for the 3GeV-synchrotron of Japan-proton accelerator research complex

Nishizawa, Daiji*; Kinsho, Michikazu; Kanazawa, Kenichiro; Ogiwara, Norio; Saito, Yoshio*; Kubo, Tomio*; Sato, Yoshihiro*

Shinku, 47(4), p.339 - 343, 2004/02

https://doi.org/10.3131/jvsj.47.339

Large aperture cylindrical beam ducts consisting of alumina ceramics will be used for the first time in the 3GeV-synchrotron of High Intensity Proton Accelerator Facility. It is necessary to evaluate roundness and straightness of ceramic ducts because we have to compensate contact area of the connected beam duct large as well as we have to compensate large enough beam aperture. We developed an apparatus of measuring roundness and straightness, and we completed data analysis method as well as measuring method. Then we are measuring and evaluating roundness and straightness of ceramic beam ducts. Now, we have newly made an ellipse ceramic duct for the 3GeV-synchrotron BM. This duct has ellipse cross-sections to satisfy with larger aperture that the beam dynamics requires. In this conference, we are going to present taken data and findings regarding form accuracy including roundness and straightness of the ellipse ceramic duct.

Journal Articles

Real-time observation of initial stages thermal oxidation on Si(001) surface by using synchrotron radiation photoemission spectroscopy

Yoshigoe, Akitaka; Moritani, Kosuke; Teraoka, Yuden

Shinku, 46(5), p.424 - 428, 2003/05

https://doi.org/10.3131/jvsj.46.424

In order to study the reaction mechanism of the initial thermal Si(001) oxidation by O$$_{2}$$(1$$times$$10$$^{-4}$$Pa) at the surface temperature region between 870K and 1120K, we have performed the ${it real-time}$ synchrotron radiation photoemission spectroscopy of Si-2p and O-1s levels. The oxygen uptake curves as a function of the oxygen exposure time were analyzed on the basis of kinetics. The Si oxidation states corresponding to the adsorbed oxygen amount were well clarified by the time evolution of Si-2p photoemission spectra.

Journal Articles

Deuterium retention of low activation ferritic steel F82H

Yamaguchi, Kaoru*; Yamauchi, Yuji*; Hirohata, Yuko*; Hino, Tomoaki*; Tsuzuki, Kazuhiro

Shinku, 46(5), p.449 - 452, 2003/05

https://doi.org/10.3131/jvsj.46.449

no abstracts in English

Journal Articles

Experiments of continuous gas separation for D$$_{2}$$/He mixed gas under room temperature

Tanzawa, Sadamitsu; Hiroki, Seiji; Abe, Tetsuya

Shinku, 46(3), p.154 - 157, 2003/03

https://doi.org/10.3131/jvsj.46.154

no abstracts in English

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