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Your search keyword '"Fujiwara, Y."' showing total 22 results
Start Over Author "Fujiwara, Y." Journal review of scientific instruments
22 results on '"Fujiwara, Y."'

15. Neutral beams for the International Thermonuclear Experimental Reactor

Author

Inoue, T., primary, Di Pietro, E., additional, Mondino, P. L., additional, Bayetti, P., additional, Hemsworth, R. S., additional, Massmann, P., additional, Fujiwara, Y., additional, Hanada, M., additional, Miyamoto, K., additional, Okumura, Y., additional, Watanabe, K., additional, Krylov, A., additional, Kulygin, V., additional, and Panasenkov, A., additional

Published
2000
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21. Effects of a dielectric material in an ion source on the ion beam current density and ion beam energy.

Author

Fujiwara, Y., Sakakita, H., Nakamiya, A., Hirano, Y., and Kiyama, S.

Subjects
*DIELECTRIC materials, *ION sources, *ION beams, *HYDROGEN ions, *ELECTRODES, *ELECTRON density
Abstract

To understand a strong focusing phenomenon that occurs in a low-energy hydrogen ion beam, the electron temperature, the electron density, and the space potential in an ion source with cusped magnetic fields are measured before and after the transition to the focusing state using an electrostatic probe. The experimental results show that no significant changes are observed before or after the transition. However, we found unique phenomena that are characterized by the position of the electrostatic probe in the ion source chamber. Specifically, the extracted ion beam current density and energy are obviously enhanced in the case where the electrostatic probe, which is covered by a dielectric material, is placed close to an acceleration electrode. [ABSTRACT FROM AUTHOR]

Published
2016
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22. Negative ion sources for neutral beam injection into fusion machines.

Author

Riz, D., Okumura, Y., Jacquot, C., Trainham, R., Fujiwara, Y., Simonin, A., and Miyamoto, K.

Subjects
ION sources, NEUTRAL beams, FUSION reactors
Abstract

Investigates the negative ion sources for neutral beam injection into fusion machines. Need for the ion source efficiency to be improved; Importance of the power loading of the source for long pulse operation; Significance of the plasma grid for electron loading of the accelerator.

Published
1998

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