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Journal Articles

Extraction of negative hydrogen ions produced with aluminum plasma grid

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M. Yoshida, R. Watano, Y. Morinaga, T. Kamikawa, W. Oohara
Journal: Physics of Plasmas
Phys. Plasmas 28, 033512 (2021)
https://doi.org/10.1063/5.0038262
Published: March 2021
View article titled, Extraction of negative hydrogen ions produced with aluminum plasma grid
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Journal Articles

Role of deflection magnetic field in hydrogen ionic plasma formation

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W. Oohara, T. Kaji, K. Hirose, M. Fujii, R. Watano, M. Watai, Y. Hiraoka, M. Yoshida
Journal: AIP Advances
AIP Advances 10, 095006 (2020)
https://doi.org/10.1063/5.0020697
Published: September 2020
View article titled, Role of deflection magnetic field in hydrogen ionic plasma formation
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Journal Articles

Analysis of the cesium distribution in the JT-60SA negative ion sources for steady long-pulse operation

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M. Yoshida, W. Oohara, M. Ichikawa, J. Hiratsuka, G. Q. Saquilayan, N. Umeda, A. Kojima, M. Kashiwagi
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 033313 (2020)
https://doi.org/10.1063/1.5131103
Published: March 2020
View article titled, Analysis of the cesium distribution in the JT-60SA negative ion sources for steady long-pulse operation
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Journal Articles

Generation of hydrogen ionic plasma superimposed with positive ion beam

Open Access
W. Oohara, M. Fujii, M. Watai, Y. Hiraoka, M. Egawa, Y. Morinaga, S. Takamori, M. Yoshida
Journal: AIP Advances
AIP Advances 9, 085303 (2019)
https://doi.org/10.1063/1.5109805
Published: August 2019
View article titled, Generation of hydrogen ionic plasma superimposed with positive ion beam
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Journal Articles

Evaluation of the temperature dependence of the cesium deposition on the plasma grid in the JT-60SA negative ion source

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M. Yoshida, W. Oohara, M. Ichikawa, J. Hiratsuka, N. Umeda, A. Kojima, M. Kashiwagi
Journal: AIP Conference Proceedings
AIP Conf. Proc. 2052, 040008 (2018)
https://doi.org/10.1063/1.5083742
Published: December 2018
View article titled, Evaluation of the temperature dependence of the cesium deposition on the plasma grid in the JT-60SA negative ion source
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Journal Articles

Negative hydrogen ions extracted from metal grids and an ionic plasma owing to diffusion

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W. Oohara, H. Yokoyama, S. Takamori, T. Kamikawa, N. Anegawa
Journal: Physics of Plasmas
Phys. Plasmas 24, 023509 (2017)
https://doi.org/10.1063/1.4976985
Published: February 2017
View article titled, Negative hydrogen ions extracted from metal grids and an ionic plasma owing to diffusion
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Journal Articles

Hydrogen ionic plasma generated using Al plasma grid

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W. Oohara, N. Anegawa, M. Egawa, K. Kawata, T. Kamikawa
Journal: Physics of Plasmas
Phys. Plasmas 23, 083518 (2016)
https://doi.org/10.1063/1.4960826
Published: August 2016
View article titled, Hydrogen ionic plasma generated using Al plasma grid
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Journal Articles

Production of negative hydrogen ions on metal grids

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W. Oohara, Y. Maetani, Takashi Takeda, Toshiaki Takeda, H. Yokoyama, K. Kawata
Journal: Physics of Plasmas
Phys. Plasmas 22, 033507 (2015)
https://doi.org/10.1063/1.4914850
Published: March 2015
View article titled, Production of negative hydrogen ions on metal grids
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Journal Articles

Effect of nickel grid parameters on production of negative hydrogen ions

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W. Oohara, H. Yokoyama, Toshiaki Takeda, Y. Maetani, Takashi Takeda, K. Kawata
Journal: Physics of Plasmas
Phys. Plasmas 21, 063514 (2014)
https://doi.org/10.1063/1.4886149
Published: June 2014
View article titled, Effect of nickel grid parameters on production of negative hydrogen ions
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Journal Articles

Hydrogen ions produced by plasma-assisted catalytic ionization using nickel grid

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W. Oohara, K. Kawata, T. Hibino
Journal: Physics of Plasmas
Phys. Plasmas 20, 063506 (2013)
https://doi.org/10.1063/1.4812714
Published: June 2013
View article titled, Hydrogen ions produced by plasma-assisted catalytic ionization using nickel grid
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Journal Articles

Separation of ion components produced by plasma-assisted catalytic ionization

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W. Oohara, T. Hibino, T. Higuchi, T. Ohta
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 83, 083509 (2012)
https://doi.org/10.1063/1.4748273
Published: August 2012
View article titled, Separation of ion components produced by plasma-assisted catalytic ionization
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Journal Articles

Development of Hydrogen Pair‐Ion Source on the Basis of Catalytic Ionization

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W. Oohara, T. Maeda, T. Higuchi
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1390, 430–435 (2011)
https://doi.org/10.1063/1.3637414
Published: September 2011
View article titled, Development of Hydrogen Pair‐Ion Source on the Basis of Catalytic Ionization
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Journal Articles

Plasma-assisted catalytic ionization using porous nickel plate

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W. Oohara, T. Maeda, T. Higuchi
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 82, 093503 (2011)
https://doi.org/10.1063/1.3637463
Published: September 2011
View article titled, Plasma-assisted catalytic ionization using porous nickel plate
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Journal Articles

Hydrogen atomic pair-ion production on catalyst surface

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W. Oohara, O. Fukumasa
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 81, 023507 (2010)
https://doi.org/10.1063/1.3314902
Published: February 2010
View article titled, Hydrogen atomic pair-ion production on catalyst surface
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Journal Articles

Enhancement of D − Negative Ion Volume Production in Pure Deuterium Plasmas

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O. Fukumasa, T. Nakano, S. Mori, W. Oohara, K. Tsumori, Y. Takeiri
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1097, 118–126 (2009)
https://doi.org/10.1063/1.3112504
Published: March 2009
View article titled, Enhancement of D − Negative Ion Volume Production in Pure Deuterium Plasmas
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Journal Articles

Characteristics of the RF Negative Ion Source Using a Mesh Grid Bias Method

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O. Fukumasa, J. Okada, Y. Tauchi, W. Oohara, K. Tsumori, Y. Takeiri
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1097, 109–117 (2009)
https://doi.org/10.1063/1.3112503
Published: March 2009
View article titled, Characteristics of the RF Negative Ion Source Using a Mesh Grid Bias Method
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Journal Articles

Basic studies of the generation and collective motion of pair-ion plasmas

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W. Oohara, R. Hatakeyama
Journal: Physics of Plasmas
Phys. Plasmas 14, 055704 (2007)
https://doi.org/10.1063/1.2436854
Published: March 2007
View article titled, Basic studies of the generation and collective motion of pair-ion plasmas
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Journal Articles

Alkali-halogen plasma generation by dc magnetron discharge

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W. Oohara, M. Nakahata, R. Hatakeyama
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 191501 (2006)
https://doi.org/10.1063/1.2202723
Published: May 2006
View article titled, Alkali-halogen plasma generation by dc magnetron discharge
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Journal Articles

Electrostatic‐Wave Behavior in Pair Fullerene‐Ion Plasma

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W. Oohara, Y. Kuwabara, R. Hatakeyama
Journal: AIP Conference Proceedings
AIP Conf. Proc. 799, 29–37 (2005)
https://doi.org/10.1063/1.2134570
Published: October 2005
View article titled, Electrostatic‐Wave Behavior in Pair Fullerene‐Ion Plasma
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Journal Articles

Efficient plasma source providing pronounced density peaks in the range of very low magnetic fields

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G. Sato, W. Oohara, R. Hatakeyama
Journal: Applied Physics Letters
Appl. Phys. Lett. 85, 4007–4009 (2004)
https://doi.org/10.1063/1.1815071
Published: November 2004
View article titled, Efficient plasma source providing pronounced density peaks in the range of very low magnetic fields
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