Find Research Outputs

Search concepts
Selected filters

Publication Year

  • 2020
  • 2019
  • 2018
  • 2017

Author

  • Hiroshi Idei
2018

Electron Bernstein wave detection by sub-Tera-Hz scattering in the QUEST

Kubo, S., Idei, H., Tatematsu, Y., Saito, T. & Iizawa, M., Oct 25 2018, 2018 43rd International Conference on Infrared Millimeter and Terahertz Waves, IRMMW-THz 2018. IEEE Computer Society, 8510425. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; vol. 2018-September).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2017

Optimized design of polarizers with low ohmic loss and any polarization state for the 28 GHz QUEST ECH/ECCD system

Tsujimura, T. I., Idei, H., Kubo, S. & Kobayashi, S., Jan 1 2017, In : Fusion Engineering and Design. 114, p. 97-101 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Effect of magnetic structure on RF-induced breakdown in QUEST

Yoneda, R., Hanada, K., Nakamura, K., Idei, H., Yoshida, N., Hasegawa, M., Onchi, T., Kuroda, K., Kawasaki, S., Higashijima, A., Nagata, T., Isayama, A., Mitarai, O., Fukuyama, A. & Takase, Y., Jun 1 2017, In : Physics of Plasmas. 24, 6, 062513.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2019

Development of high power gyrotrons for advanced fusion devices

Kariya, T., Minami, R., Imai, T., Okada, M., Motoyoshi, F., Numakura, T., Nakashima, Y., Idei, H., Onchi, T., Hanada, K., Shimozuma, T., Yoshimura, Y., Takahashi, H., Kubo, S., Oda, Y., Ikeda, R., Sakamoto, K., Ono, M., Nagasaki, K., Eguchi, T. & 1 others, Mitsunaka, Y., Apr 26 2019, In : Nuclear Fusion. 59, 6, 066009.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2017

Overview of spherical tokamak research in Japan

Takase, Y., Ejiri, A., Fujita, T., Fukumoto, N., Fukuyama, A., Hanada, K., Idei, H., Nagata, M., Ono, Y., Tanaka, H., Uchida, M., Horiuchi, R., Kamada, Y., Kasahara, H., Masuzaki, S., Nagayama, Y., Oishi, T., Saito, K., Takeiri, Y. & Tsuji-Iio, S., Jun 20 2017, In : Nuclear Fusion. 57, 10, 102005.

Research output: Contribution to journalReview article

2 Citations (Scopus)
2019

Particle balance investigation with the combination of the hydrogen barrier model and rate equations of hydrogen state in long duration discharges on an all-metal plasma facing wall in QUEST

Hanada, K., Yoshida, N., Hasegawa, M., Hatayama, A., Okamoto, K., Takagi, I., Hirata, T., Oya, Y., Miyamoto, M., Oya, M., Shikama, T., Kuzmin, A., Wang, Z. X., Long, H., Idei, H., Nagashima, Y., Nakamura, K., Watanabe, O., Onchi, T., Watanabe, H. & 12 others, Tokunaga, K., Higashijima, A., Kawasaki, S., Nagata, T., Shimabukuro, S., Takase, Y., Murakami, S., Gao, X., Liu, H., Qian, J., Raman, R. & Ono, M., May 23 2019, In : Nuclear Fusion. 59, 7, 076007.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2017

Plasma equilibrium based on RF-driven current profile without assuming nested magnetic surfaces on QUEST

Nakamura, K., Alam, M. M., Jiang, Y. Z., Mitarai, O., Kurihara, K., Kawamata, Y., Sueoka, M., Takechi, M., Hasegawa, M., Tokunaga, K., Araki, K., Zushi, H., Hanada, K., Fujisawa, A., Idei, H., Nagashima, Y., Kawasaki, S., Nakashima, H., Higashijima, A., Nagata, T. & 1 others, Fukuyama, A., Nov 2017, In : Fusion Engineering and Design. 123, p. 532-534 3 p.

Research output: Contribution to journalArticle

2019

Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST

Nakamura, K., Alam, M. M., Jiang, Y. Z., Mitarai, O., Takechi, M., Hasegawa, M., Tokunaga, K., Hanada, K., Idei, H., Nagashima, Y., Onchi, T., Kuroda, K., Watanabe, O., Higashijima, A., Nagata, T., Shimabukuro, S., Kawasaki, S. & Fukuyama, A., Sep 2019, In : Fusion Engineering and Design. 146, p. 2628-2631 4 p.

Research output: Contribution to journalArticle

Prototype phased-array patch loop antennae for electron cyclotron emission diagnostics

Fukuyama, M., Idei, H., Yunoki, M., Ashida, R., Ogata, D., Ikezoe, R. & Onchi, T., Jan 1 2019, In : Plasma and Fusion Research. 14, 3402111.

Research output: Contribution to journalArticle

Open Access
2018

Initial results from solenoid-free plasma start-up using Transient CHI on QUEST

Kuroda, K., Raman, R., Hanada, K., Hasegawa, M., Onchi, T., Ono, M., Nelson, B. A., Jarboe, T. R., Nagata, M., Mitarai, O., Nakamura, K., Idei, H., Rogers, J., Kawasaki, S., Nagata, T., Kuzmin, A., Kojima, S., Huang, C., Watanabe, O., Higashijima, A. & 3 others, Takase, Y., Fukuyama, A. & Murakami, S., Sep 14 2018, In : Plasma Physics and Controlled Fusion. 60, 11, 115001.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2017

Development of over-MW gyrotrons for fusion at 14 GHz to sub-THz frequencies

Kariya, T., Imai, T., Minami, R., Sakamoto, K., Oda, Y., Ikeda, R., Shimozuma, T., Kubo, S., Idei, H., Numakura, T., Tsumura, K., Ebashi, Y., Okada, M., Nakashima, Y., Yoshimura, Y., Takahashi, H., Ito, S., Hanada, K., Nagasaki, K., Ono, M. & 2 others, Eguchi, T. & Mitsunaka, Y., Apr 11 2017, In : Nuclear Fusion. 57, 6, 066001.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2019

28-GHz ECHCD system with beam focusing launcher on the QUEST spherical tokamak

Idei, H., Onchi, T., Kariya, T., Tsujimura, T. I., Kubo, S., Kobayashi, S., Sakaguchi, M., Imai, T., Hasegawa, M., Nakamura, K., Mishra, K., Fukuyama, M., Yunoki, M., Kojima, S., Watanabe, O., Kuroda, K., Hanada, K., Nagashima, Y., Ejiri, A., Matsumoto, N. & 7 others, Ono, M., Higashijima, A., Nagata, T., Shimabukoro, S., Takase, Y., Fukuyama, A. & Murakami, S., Jan 1 2019, In : Fusion Engineering and Design.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2018

Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas

Yoneda, N., Shikama, T., Zushi, H., Hanada, K., Fujikawa, A., Onchi, T., Kuroda, K., Nii, K., Hasuo, M., Hasegawa, M., Idei, H., Nakamura, K., Nagashima, Y., Higashijima, A. & Nagata, T., Jan 1 2018, In : Plasma and Fusion Research. 13, 3402087.

Research output: Contribution to journalArticle

Open Access
1 Citation (Scopus)
2019

High voltage electrical system of 8.56 GHz CW klystron for electron cyclotron heating on QUEST spherical tokamak

Onchi, T., Idei, H., Nakamura, K., Nagata, T., Kawasaki, S., Ashida, R., Fukuyama, M., Hasegawa, M., Ikezoe, R., Higashijima, A., Kuroda, K., Nagashima, Y. & Hanada, K., Sep 1 2019, In : Fusion Engineering and Design. 146, p. 2567-2570 4 p.

Research output: Contribution to journalArticle

2017

Measurement of thickness of film deposited on the plasma-facing wall in the QUEST tokamak by colorimetry

Wang, Z., Hanada, K., Yoshida, N., Shimoji, T., Miyamoto, M., Oya, Y., Zushi, H., Idei, H., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Kawasaki, S., Higashijima, A., Nakashima, H., Nagata, T., Kawaguchi, A., Fujiwara, T., Araki, K., Mitarai, O. & 3 others, Fukuyama, A., Takase, Y. & Matsumoto, K., Sep 1 2017, In : Review of Scientific Instruments. 88, 9, 093502.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2018

Modification of plasma control system and hot-wall temperature control system for long-duration plasma sustainment in QUEST

Hasegawa, M., Nakamura, K., Hanada, K., Kawasaki, S., Kuzmin, A., Idei, H., Tokunaga, K., Nagashima, Y., Onchi, T., Kuroda, K., Watanabe, O., Higashijima, A. & Nagata, T., Apr 2018, In : Fusion Engineering and Design. 129, p. 202-206 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2017

Erratum: Current Start-Up Using the New CHI System [Plasma Fusion Res., 12, (2017) (1202020)] DOI: 10.1585/pfr.12.1202020

Kuroda, K., Raman, R., Hanada, K., Hasegawa, M., Onchi, T., Ono, M., Jarboe, T. R., Nelson, B. A., Nagata, M., Mitarai, O., Nakamura, K., Idei, H., Rogers, J., Kawasaki, S., Nagata, T., Kuzmin, A., Kojima, S., Watanabe, O., Higashijima, A., Takase, Y. & 1 others, Fukuyama, A., Jan 1 2017, In : Plasma and Fusion Research. 12, 1902026.

Research output: Contribution to journalComment/debate

Open Access

Current start-up using the new CHI system

Kuroda, K., Raman, R., Hanada, K., Hasegawa, M., Onchi, T., Ono, M., Jaboe, T., Nelson, B. A., Nagata, M., Mitarai, O., Nakamura, K., Idei, H., Rogers, J., Kawasaki, S., Nagata, T., Kuzmin, A., Kojima, S., Watanabe, O., Higashijima, A., Takase, Y. & 1 others, Fukuyama, A., Jan 1 2017, In : Plasma and Fusion Research. 12, 1202020.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2019

Quasi-optical polarizer system for ECHCD experiments in the QUEST

Fukuyama, M., Idei, H., Tsujimura, T. I., Kubo, S., Kobayashi, S., Yunoki, M., Onchi, T. & Ikezoe, R., Sep 2019, In : Fusion Engineering and Design. 146, p. 1437-1440 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2017

Investigation of hydrogen recycling in long-duration discharges and its modification with a hot wall in the spherical tokamak QUEST

Hanada, K., Yoshida, N., Honda, T., Wang, Z., Kuzmin, A., Takagi, I., Hirata, T., Oya, Y., Miyamoto, M., Zushi, H., Hasegawa, M., Nakamura, K., Fujisawa, A., Idei, H., Nagashima, Y., Watanabe, O., Onchi, T., Kuroda, K., Long, H., Watanabe, H. & 7 others, Tokunaga, K., Higashijima, A., Kawasaki, S., Nagata, T., Takase, Y., Fukuyama, A. & Mitarai, O., Oct 26 2017, In : Nuclear Fusion. 57, 12, 126061.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2018

Effect of magnetic shear on edge turbulence in SOL-like open field line configuration in QUEST

Banerjee, S., Zushi, H., Nishino, N., Hanada, K., Idei, H., Nakamura, K., Hasegawa, M., Fujisawa, A., Nagashima, Y., Mishra, K., Tashima, S., Onchi, T., Kuzmin, A. & Matsuoka, K., Jun 28 2018, In : Plasma Physics and Controlled Fusion. 60, 8, 085014.

Research output: Contribution to journalArticle

2017

Fully non-inductive second harmonic electron cyclotron plasma ramp-up in the QUEST spherical tokamak

Idei, H., Kariya, T., Imai, T., Mishra, K., Onchi, T., Watanabe, O., Zushi, H., Hanada, K., Qian, J., Ejiri, A., Alam, M. M., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Matsuoka, K., Fukuyama, A., Kubo, S., Shimozuma, T., Yoshikawa, M. & 8 others, Sakamoto, M., Kawasaki, S., Nakashima, H., Higashijima, A., Ide, S., Maekawa, T., Takase, Y. & Toi, K., Oct 5 2017, In : Nuclear Fusion. 57, 12, 126045.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Spatial distribution of atomic and ion hydrogen flux and its effect on hydrogen recycling in long duration confined and non-confined plasmas

Kuzmin, A., Zushi, H., Takagi, I., Sharma, S. K., Kobayashi, M., Hirooka, Y., Onchi, T., Hanada, K., Yoshida, N., Nakamura, K., Fujisawa, A., Idei, H., Nagashima, Y., Hasegawa, M., Mutoh, T., Mishra, K. & Ohwada, H., Aug 2017, In : Nuclear Materials and Energy. 12, p. 627-632 6 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2019

HFS injection of X-mode for EBW conversion in QUEST

Elserafy, H., Hanada, K., Kuroda, K., Idei, H., Yoneda, R., Huang, C., Kojima, S., Hasegawa, M., Nagashima, Y., Onchi, T., Ikezoe, R., Higashijima, A., Nagata, T., Kawasaki, S., Shimabukuro, S., Bertelli, N. & Ono, M., Jan 1 2019, In : Plasma and Fusion Research. 14, 1, 1205038.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Estimation of fuel particle balance in steady state operation with hydrogen barrier model

Hanada, K., Yoshida, N., Takagi, I., Hirata, T., Hatayama, A., Okamoto, K., Oya, Y., Shikama, T., Wang, Z., Long, H., Huang, C., Oya, M., Idei, H., Nagashima, Y., Onchi, T., Hasegawa, M., Nakamura, K., Zushi, H., Kuroda, K., Kawasaki, S. & 10 others, Higashijima, A., Nagata, T., Shimabukuro, S., Takase, Y., Murakami, S., Gao, X., Liu, H., Qian, J., Raman, R. & Ono, M., May 2019, In : Nuclear Materials and Energy. 19, p. 544-549 6 p.

Research output: Contribution to journalArticle

Open Access
1 Citation (Scopus)