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Journal Articles

Beam commissioning of the linac for iBNCT

Naito, Fujio*; Anami, Shozo*; Ikegami, Kiyoshi*; Uota, Masahiko*; Ouchi, Toshikatsu*; Onishi, Takahiro*; Oba, Toshiyuki*; Obina, Takashi*; Kawamura, Masato*; Kumada, Hiroaki*; et al.

Proceedings of 13th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.1244 - 1246, 2016/11

The proton linac installed in the Ibaraki Neutron Medical Research Center is used for production of the intense neutron flux for the Boron Neutron Capture Therapy (BNCT). The linac consists of the 3-MeV RFQ and the 8-MeV DTL. Design average beam current is 10mA. Target is made of Beryllium. First neutron production from the Beryllium target was observed at the end of 2015 with the low intensity beam as a demonstration. After the observation of neutron production, a lot of improvement s was carried out in order to increase the proton beam intensity for the real beam commissioning. The beam commissioning has been started on May 2016. The status of the commissioning is summarized in this report.

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, 2004/05

no abstracts in English

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

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.

JAEA Reports

Roundness and straightness measurement of ceramic beam ducts for the 3GeV-synchrotron

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

JAERI-Tech 2001-081, 117 Pages, 2001/12

JAERI-Tech-2001-081.pdf:6.84MB

no abstracts in English

Journal Articles

Irradiation effects on alumina ceramics for vacuum duct

Kinsho, Michikazu; Nishizawa, Daiji*; Uota, Masahiko*; Kubo, Tomio*; Sato, Yoshihiro*; Saito, Yoshio*

Shinku, 44(3), p.131 - 134, 2001/03

no abstracts in English

Oral presentation

Outgassing measurements for vacuum chamber used for J-PARC accelerators

Saito, Yoshio*; Sato, Yoshihiro*; Shimamoto, Masayuki*; Kubo, Tomio*; Uota, Masahiko*; Hori, Yoichiro*; Kinsho, Michikazu; Kabeya, Zenzaburo*

no journal, , 

In the J-PARC acceletarors, maintenances should be minimized under high levels of radiation. An ultra high vacuum is required for the system in order to realize a long lifetime of the vacuum components. Materials of copper, stainless steel, titanium, alumina ceramics are to be finished as so to reduce the outgassing rate. The measurement of outgassing rate of titanium whose surface is chemically stable has the lowest value compared to any other materials examined so far.

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