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Journal Articles

Design and test of a waveguide filter for reflected electromagnetic waves

Open Access
C. Fransoo, M. Nishiura, S. Kubo
Journal: AIP Advances
AIP Advances 15, 055008 (2025)
https://doi.org/10.1063/5.0272456
Published: May 2025
View article titled, Design and test of a waveguide filter for reflected electromagnetic waves
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Journal Articles

Azimuthal mode decomposition of millimeter-wave integer and non-integer optical vortices generated by a spiral mirror

Open Access
Y. Goto, T. I. Tsujimura, S. Kubo
Journal: AIP Advances
AIP Advances 15, 025225 (2025)
https://doi.org/10.1063/5.0245432
Published: February 2025
View article titled, Azimuthal mode decomposition of millimeter-wave integer and non-integer optical vortices generated by a spiral mirror
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Journal Articles

Quasioptical modeling of wave beams with and without mode conversion. IV. Numerical simulations of waves in dissipative media

Free
K. Yanagihara, I. Y. Dodin, S. Kubo
Journal: Physics of Plasmas
Phys. Plasmas 28, 122102 (2021)
https://doi.org/10.1063/5.0057345
Published: December 2021
View article titled, Quasioptical modeling of wave beams with and without mode conversion. IV. Numerical simulations of waves in dissipative media
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Journal Articles

W-band millimeter-wave back-scattering system for high wavenumber turbulence measurements in LHD

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T. Tokuzawa, K. Tanaka, T. Tsujimura, S. Kubo, M. Emoto, S. Inagaki, K. Ida, M. Yoshinuma, K. Y. Watanabe, H. Tsuchiya, A. Ejiri, T. Saito, K. Yamamoto, LHD Experiment Group
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 043536 (2021)
https://doi.org/10.1063/5.0043474
Published: April 2021
View article titled, W-band millimeter-wave back-scattering system for high wavenumber turbulence measurements in LHD
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Journal Articles

Q-band high-performance notch filters at 56 and 77 GHz notches for versatile fusion plasma diagnostics

Available to Purchase
M. Nishiura, T. Shimizu, S. Kobayashi, T. Tokuzawa, K. Ichinose, S. Kubo
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 034711 (2021)
https://doi.org/10.1063/5.0041243
Published: March 2021
View article titled, Q-band high-performance notch filters at 56 and 77 GHz notches for versatile fusion plasma diagnostics
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Journal Articles

Quasioptical modeling of wave beams with and without mode conversion. II. Numerical simulations of single-mode beams

Free
K. Yanagihara, I. Y. Dodin, S. Kubo
Journal: Physics of Plasmas
Phys. Plasmas 26, 072111 (2019)
https://doi.org/10.1063/1.5095173
Published: July 2019
View article titled, Quasioptical modeling of wave beams with and without mode conversion. II. Numerical simulations of single-mode beams
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Journal Articles

Quasioptical modeling of wave beams with and without mode conversion. I. Basic theory

Free
I. Y. Dodin, D. E. Ruiz, K. Yanagihara, Y. Zhou, S. Kubo
Journal: Physics of Plasmas
Phys. Plasmas 26, 072110 (2019)
https://doi.org/10.1063/1.5095076
Published: July 2019
View article titled, Quasioptical modeling of wave beams with and without mode conversion. I. Basic theory
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Includes: Supplementary data
Journal Articles

Quasioptical modeling of wave beams with and without mode conversion. III. Numerical simulations of mode-converting beams

Free
K. Yanagihara, I. Y. Dodin, S. Kubo
Journal: Physics of Plasmas
Phys. Plasmas 26, 072112 (2019)
https://doi.org/10.1063/1.5095174
Published: July 2019
View article titled, Quasioptical modeling of wave beams with and without mode conversion. III. Numerical simulations of mode-converting beams
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Journal Articles

Mode conversion in cold low-density plasma with a sheared magnetic field

Editor’s PickAvailable to Purchase
I. Y. Dodin, D. E. Ruiz, S. Kubo
Journal: Physics of Plasmas
Phys. Plasmas 24, 122116 (2017)
https://doi.org/10.1063/1.5003931
Published: December 2017
View article titled, Mode conversion in cold low-density plasma with a sheared magnetic field
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Journal Articles

Observation of the inward propagation of spontaneous toroidal flow from the plasma boundary in LHD

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K. Kamiya, K. Ida, K. Itoh, S.-I. Itoh, M. Yoshinuma, M. Yokoyama, S. Kubo, H. Tsuchiya, N. Tamura, S. Masuzaki, C. Suzuki, T. Akiyama, LHD Experiment Group
Journal: Physics of Plasmas
Phys. Plasmas 23, 102309 (2016)
https://doi.org/10.1063/1.4965908
Published: October 2016
View article titled, Observation of the inward propagation of spontaneous toroidal flow from the plasma boundary in LHD
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Journal Articles

2D spatial profile measurements of potential fluctuation with heavy ion beam probe on the Large Helical Device

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A. Shimizu, T. Ido, M. Nishiura, S. Kato, K. Ogawa, H. Takahashi, H. Igami, Y. Yoshimura, S. Kubo, T. Shimozuma
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E731 (2016)
https://doi.org/10.1063/1.4963908
Published: October 2016
View article titled, 2D spatial profile measurements of potential fluctuation with heavy ion beam probe on the Large Helical Device
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Journal Articles

Reconstruction of high temporal resolution Thomson scattering data during a modulated electron cyclotron resonance heating using conditional averaging

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T. Kobayashi, K. Ida, K. Itoh, M. Yoshinuma, C. Moon, S. Inagaki, I. Yamada, H. Funaba, R. Yasuhara, H. Tsuchiya, S. Ohdachi, Y. Yoshimura, H. Igami, T. Shimozuma, S. Kubo, T. I. Tsujimura
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 043505 (2016)
https://doi.org/10.1063/1.4945258
Published: April 2016
View article titled, Reconstruction of high temporal resolution Thomson scattering data during a modulated electron cyclotron resonance heating using conditional averaging
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Journal Articles

Plasma interface of the EC waves to the LHD peripheral region

Free
S. Kubo, H. Igami, T. I. Tsujimura, T. Shimozuma, H. Takahashi, Y. Yoshimura, M. Nishiura, R. Makino, T. Mutoh
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1689, 090006 (2015)
https://doi.org/10.1063/1.4936543
Published: December 2015
View article titled, Plasma interface of the EC waves to the LHD peripheral region
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Journal Articles

High-power and steady-state operation of ICRF heating in the large helical device

Free
T. Mutoh, T. Seki, K. Saito, H. Kasahara, R. Seki, S. Kamio, R. Kumazawa, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, T. Ii, R. Makino, K. Nagaoka, G. Nomura, T. Shinya, LHD Experiment Group
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1689, 030009 (2015)
https://doi.org/10.1063/1.4936474
Published: December 2015
View article titled, High-power and steady-state operation of ICRF heating in the large helical device
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Journal Articles

Design of polarizers for a mega-watt long-pulse millimeter-wave transmission line on the large helical device

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T. Ii, S. Kubo, T. Shimozuma, S. Kobayashi, K. Okada, Y. Yoshimura, H. Igami, H. Takahashi, S. Ito, Y. Mizuno, K. Okada, R. Makino, K. Kobayashi, Y. Goto, T. Mutoh
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 86, 023502 (2015)
https://doi.org/10.1063/1.4907355
Published: February 2015
View article titled, Design of polarizers for a mega-watt long-pulse millimeter-wave transmission line on the large helical device
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Journal Articles

Electron cyclotron beam measurement system in the Large Helical Device

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S. Kamio, H. Takahashi, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, S. Ito, S. Kobayashi, Y. Mizuno, K. Okada, M. Osakabe, T. Mutoh
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 11E822 (2014)
https://doi.org/10.1063/1.4893432
Published: August 2014
View article titled, Electron cyclotron beam measurement system in the Large Helical Device
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Journal Articles

Development of fast steering mirror control system for plasma heating and diagnostics

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K. Okada, M. Nishiura, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, K. Tanaka, S. Kobayashi, S. Ito, Y. Mizuno, S. Ogasawara
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 11E811 (2014)
https://doi.org/10.1063/1.4891044
Published: July 2014
View article titled, Development of fast steering mirror control system for plasma heating and diagnostics
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Journal Articles

Power and polarization monitor development for high power millimeter-wave

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R. Makino, S. Kubo, K. Kobayashi, S. Kobayashi, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, T. Mutoh
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 11D831 (2014)
https://doi.org/10.1063/1.4891162
Published: July 2014
View article titled, Power and polarization monitor development for high power millimeter-wave
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Journal Articles

Extension of high Te regime with upgraded electron cyclotron resonance heating system in the Large Helical Device

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H. Takahashi, T. Shimozuma, S. Kubo, Y. Yoshimura, H. Igami, S. Ito, S. Kobayashi, Y. Mizuno, K. Okada, T. Mutoh, K. Nagaoka, S. Murakami, M. Osakabe, I. Yamada, H. Nakano, M. Yokoyama, T. Ido, A. Shimizu, R. Seki, K. Ida, M. Yoshinuma, T. Kariya, R. Minami, T. Imai, N. B. Marushchenko, Y. Turkin, LHD Experiment Group
Journal: Physics of Plasmas
Phys. Plasmas 21, 061506 (2014)
https://doi.org/10.1063/1.4884365
Published: June 2014
View article titled, Extension of high Te regime with upgraded electron cyclotron resonance heating system in the Large Helical Device
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Journal Articles

Development of steady-state operation using ion cyclotron heating in the Large Helical Device

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H. Kasahara, T. Seki, K. Saito, R. Seki, R. Kumazawa, Y. Yoshimura, S. Kubo, T. Shimozuma, H. Igami, H. Takahashi, K. Nagasaki, Y. Ueda, M. Tokitani, N. Ashikawa, M. Shoji, T. Wakatsuki, S. Kamio, H. Tsuchiya, S. Yoshimura, N. Tamura, C. Suzuki, H. Yamada, T. Mutoh, LHD Experiment Group
Journal: Physics of Plasmas
Phys. Plasmas 21, 061505 (2014)
https://doi.org/10.1063/1.4884363
Published: June 2014
View article titled, Development of steady-state operation using ion cyclotron heating in the Large Helical Device
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