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Journal Articles

First results of deuterium beam operation on neutral beam injectors in the large helical device

K. Ikeda, K. Tsumori, M. Kisaki, H. Nakano, K. Nagaoka, M. Osakabe, S. Kamio, Y. Fujiwara, Y. Haba, Y. Takeiri
Journal: AIP Conference Proceedings
AIP Conf. Proc. 2011, 060002 (2018)
https://doi.org/10.1063/1.5053331
Published: September 2018
View articletitled, First results of deuterium beam operation on neutral beam injectors in the large helical device
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Journal Articles

Physics-based investigation of negative ion behavior in a negative-ion-rich plasma using integrated diagnostics

K. Tsumori, Y. Takeiri, K. Ikeda, H. Nakano, S. Geng, M. Kisaki, K. Nagaoka, T. Tokuzawa, M. Wada, K. Sasaki, S. Nishiyama, M. Goto, M. Osakabe
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1869, 030001 (2017)
https://doi.org/10.1063/1.4995721
Published: August 2017
View articletitled, Physics-based investigation of negative ion behavior in a negative-ion-rich plasma using integrated diagnostics
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Journal Articles

Study of back streaming ion using a slot-type grounded grid in hydrogen negative-ion source

K. Ikeda, M. Kisaki, H. Nakano, K. Nagaoka, M. Osakabe, S. Kamio, K. Tsumori, S. Geng, Y. Takeiri
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1869, 050004 (2017)
https://doi.org/10.1063/1.4995785
Published: August 2017
View articletitled, Study of back streaming ion using a slot-type grounded grid in hydrogen negative-ion source
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Journal Articles

Upgraded millimeter-wave interferometer for measuring the electron density during the beam extraction in the negative ion source

T. Tokuzawa, M. Kisaki, K. Nagaoka, K. Tsumori, Y. Ito, K. Ikeda, H. Nakano, M. Osakabe, Y. Takeiri, O. Kaneko
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E105 (2016)
https://doi.org/10.1063/1.4959841
Published: August 2016
View articletitled, Upgraded millimeter-wave interferometer for measuring the electron density during the beam extraction in the negative ion source
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Journal Articles

Negative ion production and beam extraction processes in a large ion source (invited)

K. Tsumori, K. Ikeda, H. Nakano, M. Kisaki, S. Geng, M. Wada, K. Sasaki, S. Nishiyama, M. Goto, G. Serianni, P. Agostinetti, E. Sartori, M. Brombin, P. Veltri, C. Wimmer, K. Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 02B936 (2016)
https://doi.org/10.1063/1.4938254
Published: January 2016
View articletitled, Negative ion production and beam extraction processes in a large ion source (invited)
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Journal Articles

Improvement of accelerator of negative ion source on the Large Helical Device

M. Kisaki, K. Ikeda, M. Osakabe, K. Tsumori, H. Nakano, S. Geng, K. Nagaoka, O. Kaneko, Y. Takeiri
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 02B321 (2016)
https://doi.org/10.1063/1.4936249
Published: November 2015
View articletitled, Improvement of accelerator of negative ion source on the Large Helical Device
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Journal Articles

Optics of the NIFS negative ion source test stand by infrared calorimetry and numerical modelling

P. Veltri, V. Antoni, P. Agostinetti, M. Brombin, K. Ikeda, M. Kisaki, H. Nakano, E. Sartori, G. Serianni, Y. Takeiri, K. Tsumori
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 02B908 (2016)
https://doi.org/10.1063/1.4932982
Published: October 2015
View articletitled, Optics of the NIFS negative ion source test stand by infrared calorimetry and numerical modelling
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Journal Articles

Installation of spectrally selective imaging system in RF negative ion source

K. Ikeda, D. Wünderlich, U. Fantz, B. Heinemann, M. Kisaki, K. Nagaoka, H. Nakano, M. Osakabe, K. Tsumori, S. Geng, O. Kaneko, Y. Takeiri
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 02B113 (2016)
https://doi.org/10.1063/1.4932987
Published: October 2015
View articletitled, Installation of spectrally selective imaging system in RF negative ion source
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Journal Articles

Charged particle flows in the beam extraction region of a negative ion source for NBI

S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, M. Osakabe, K. Nagaoka, Y. Takeiri, M. Shibuya, O. Kaneko
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 02B103 (2016)
https://doi.org/10.1063/1.4931796
Published: October 2015
View articletitled, Charged particle flows in the beam extraction region of a negative ion source for NBI
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Journal Articles

Hydrogen atom temperature measured with wavelength-modulated laser absorption spectroscopy in large scale filament arc negative hydrogen ion source

H. Nakano, S. Nishiyama, M. Goto, K. Tsumori, M. Kisaki, K. Ikeda, K. Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko, K. Sasaki
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1655, 020018 (2015)
https://doi.org/10.1063/1.4916427
Published: April 2015
View articletitled, Hydrogen atom temperature measured with wavelength-modulated laser absorption spectroscopy in large scale filament arc negative hydrogen ion source
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Journal Articles

Evaluation of negative ion distribution changes by image processing diagnostic

K. Ikeda, H. Nakano, K. Tsumori, M. Kisaki, S. Geng, K. Nagaoka, T. Tokuzawa, M. Osakabe, Y. Takeiri, O. Kaneko
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1655, 040005 (2015)
https://doi.org/10.1063/1.4916447
Published: April 2015
View articletitled, Evaluation of negative ion distribution changes by image processing diagnostic
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Journal Articles

Design, installation, commissioning and operation of a beamlet monitor in the negative ion beam test stand at NIFS

V. Antoni, P. Agostinetti, M. Brombin, V. Cervaro, R. Delogu, M. De Muri, D. Fasolo, L. Franchin, R. Ghiraldelli, K. Ikeda, M. Kisaki, F. Molon, A. Muraro, H. Nakano, R. Pasqualotto, G. Serianni, Y. Takeiri, M. Tollin, K. Tsumori, P. Veltri
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1655, 060005 (2015)
https://doi.org/10.1063/1.4916474
Published: April 2015
View articletitled, Design, installation, commissioning and operation of a beamlet monitor in the negative ion beam test stand at NIFS
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Journal Articles

Laser photodetachment diagnostics of a 1/3-size negative hydrogen ion source for NBI

S. Geng, K. Tsumori, H. Nakano, M. Kisaki, K. Ikeda, Y. Takeiri, M. Osakabe, K. Nagaoka, O. Kaneko
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1655, 040014 (2015)
https://doi.org/10.1063/1.4916456
Published: April 2015
View articletitled, Laser photodetachment diagnostics of a 1/3-size negative hydrogen ion source for NBI
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Journal Articles

Research progress on ionic plasmas generated in an intense hydrogen negative ion source

Y. Takeiri, K. Tsumori, K. Ikeda, H. Nakano, M. Kisaki, K. Nagaoka, T. Tokuzawa, S. Geng, M. Osakabe, O. Kaneko, T. Kondo, M. Sato, M. Shibuya, S. Komada, H. Sekiguchi
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1655, 060004 (2015)
https://doi.org/10.1063/1.4916473
Published: April 2015
View articletitled, Research progress on ionic plasmas generated in an intense hydrogen negative ion source
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Journal Articles

Wide dynamic range neutron flux monitor having fast time response for the Large Helical Device

M. Isobe, K. Ogawa, H. Miyake, H. Hayashi, T. Kobuchi, Y. Nakano, K. Watanabe, A. Uritani, T. Misawa, T. Nishitani, M. Tomitaka, T. Kumagai, Y. Mashiyama, D. Ito, S. Kono, M. Yamauchi, Y. Takeiri
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 11E114 (2014)
https://doi.org/10.1063/1.4891049
Published: August 2014
View articletitled, Wide dynamic range neutron flux monitor having fast time response for the Large Helical Device
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Journal Articles

Progress in development of the neutron profile monitor for the large helical device

K. Ogawa, M. Isobe, E. Takada, Y. Uchida, K. Ochiai, H. Tomita, A. Uritani, T. Kobuchi, Y. Takeiri
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 11E110 (2014)
https://doi.org/10.1063/1.4890399
Published: July 2014
View articletitled, Progress in development of the neutron profile monitor for the large helical device
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Journal Articles

Characteristics of plasma grid bias in large-scaled negative ion source

M. Kisaki, K. Tsumori, K. Ikeda, H. Nakano, M. Osakabe, K. Nagaoka, Y. Takeiri, O. Kaneko
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 02B131 (2014)
https://doi.org/10.1063/1.4854295
Published: January 2014
View articletitled, Characteristics of plasma grid bias in large-scaled negative ion source
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Journal Articles

Development of spectrally selective imaging system for negative hydrogen ion source

K. Ikeda, H. Nakano, K. Tsumori, M. Kisaki, K. Nagaoka, M. Osakabe, Y. Takeiri, O. Kaneko
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 02A724 (2014)
https://doi.org/10.1063/1.4842318
Published: December 2013
View articletitled, Development of spectrally selective imaging system for negative hydrogen ion source
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Journal Articles

3-D effects on viscosity and generation of toroidal and poloidal flows in LHD

K. Nagaoka, K. Ida, M. Yoshinuma, Y. Suzuki, K. Kamiya, S. Satake, K. Tanaka, M. Yokoyama, S. Murakami, M. Osakabe, H. Takahashi, R. Seki, C. Suzuki, Y. Narushima, H. Nakano, M. Kisaki, K. Ikeda, K. Tsumori, Y. Takeiri, O. Kaneko, H. Yamada, LHD Experiment Group
Journal: Physics of Plasmas
Phys. Plasmas 20, 056116 (2013)
https://doi.org/10.1063/1.4807126
Published: May 2013
View articletitled, 3-D effects on viscosity and generation of toroidal and poloidal flows in LHD
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Journal Articles

Workshop on performance variations in H− ion sources 2012: PV H−12

M. P. Stockli, D. Faircloth, W. Kraus, A. Ando, D. S. Bollinger, S. Briefi, U. Fantz, R. Friedl, M. Kashiwagi, D. King, H. Koivisto, B. X. Han, J. Lettry, Y. Takeiri, O. Tarvainen, K. Tsumori, R. F. Welton, Ch. Wimmer
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1515, 594–597 (2013)
https://doi.org/10.1063/1.4792832
Published: February 2013
View articletitled, Workshop on performance variations in H− ion sources 2012: PV H−12
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