N. Ogiwara

Evaluation of 2-D Transverse Beam Profile Monitor Using Gas Sheet at J-PARC LINAC

J. Kamiya, Kota Okabe, Michikazu Kinsho, K. Moriya et autres

Abstract A transverse beam profile monitor, which detects ions or luminescence generated by the interaction between the beam and the gas molecules distributed in a sheet shape, has been developed in the J-PARC LINAC. To know about the gas density distribution of …

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Non-destructive 2-D beam profile monitor using gas sheet in J-PARC LINAC

J. Kamiya, N. Ogiwara, Akihiko Miura, Michikazu Kinsho et autres

A beam profile monitor using interaction between the beam and the gas molecules distributed in sheet shape has been developed. Ions or luminescence generated by passing the beam through the gas sheet has the information of cross-section shape of the beam. The …

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REDUCTION OF OUTGASSING FROM THE FERRITE CORES IN THE KICKER MAGNET OF J-PARC RCS

N. Ogiwara, Yusuke Hikichi, J. Kamiya, Michikazu Kinsho et autres

Kicker magnets are used to kick out the accelerated beam to the transport lines in the RCS of the J-PARC. A high voltage is applied to kickers for a short period, so they must be installed in a vacuum to prevent discharge. …

Beam loss reduction by magnetic shielding using beam pipes and bellows of soft magnetic materials

J. Kamiya, N. Ogiwara, H. Hotchi, Naoki Hayashi et autres

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Vacuum chamber made of soft magnetic material with high permeability

J. Kamiya, N. Ogiwara, Masaaki NISHIKAWA, Yusuke Hikichi et autres

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Status of vacuum system in J-PARC RCS

J. Kamiya, N. Ogiwara, Masaaki NISHIKAWA, Yusuke Hikichi et autres

Material and surface processing in J-PARC vacuum system

Y. Saito, F. Naito, C. Kubota, Shin-ichiro Meigo et autres

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ULTRAHIGH VACUUM FOR HIGH INTENSITY PROTON ACCELERATORS : EXEMPLIFIED BY THE 3 GEV RCS IN THE J-PARC

N. Ogiwara

Beam commissioning of the 3-GeV rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

H. Hotchi, Michikazu Kinsho, K. Hasegawa, Naoki Hayashi et autres

The 3-GeV rapid cycling synchrotron (RCS) of the Japan Proton Accelerator Research Complex (J-PARC) was commissioned in October 2007, and successfully accomplished 3 GeV acceleration on October 31. Six run cycles through February 2008 were dedicated to commissioning the RCS, for which …

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Reduction of hydrogen content in pure Ti

N. Ogiwara, K. Suganuma, Yusuke Hikichi, J. Kamiya et autres

Pure Ti is adopted as a material for ducts and bellows at the proton accelerator 3 GeV-RCS in J-PARC project, because of its small residual radioactivity. In the particle accelerator, the H 2 outgassing due to ion impact is often the dominant …

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Electric Discharge Suppression by Outgassing Reduction from Kicker Magnet of J-PARC RCS

J. Kamiya, Michikazu Kinsho, N. Ogiwara

Kicker magnets in rapid cycling synchrotron (RCS) of Japan Proton Accelerator Research Complex (J-PARC) are now under construction. Extraction kicker magnets are short pulse magnets with high charging voltage of more then 60 kV which is installing in vacuum chambers. They mainly …

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Gamma-Ray Irradiation Experiments of Collimator Key Components for the 3GeV-RCS of J-PARC

Michikazu Kinsho, N. Ogiwara, Fumihiro Masukawa, Osamu Takeda et autres

It was success to develop the radiation resistant components using for beam collimator. Turbo molecular pump could be operated more than 15 MGy of gamma ray irradiation dose. Stepping motor developed at JAERI could be operated with good performance in the gamma …

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