Masaki Uchida

Profile Information

Affiliation: Kyoto University

J-GLOBAL ID: 201401055942098844
researchmap Member ID: 7000008577

Research Areas

Energy / Nuclear fusion /

Papers

ELECTRON BEAM INJECTION TO NON-INDUCTIVELY-PRODUCED SPHERICAL TOKAMAK PLASMAS BY ELECTRON BERNSTEIN WAVE IN LATE

H. TANAKA, T. KUZUMA, R. ASHIDA, R. KAJITA, T. NAGAEKI, T. NAKAI, S. MATSUI, S. YAMAGATA, R. NAKAI, X. GUO …

Proc. 28th Int. Conf. on Fusion Energy, 759, 2021 Peer-reviewed
Mapping of power deposition zone of electron Bernstein waves externally excited in tokamak plasmas

T Maekawa, H Tanaka, M Uchida

Plasma Physics and Controlled Fusion, 61(10) 105017-105017, Oct 1, 2019 Peer-reviewed
ELECTRON BERNSTEIN WAVE HEATING AND CURRENT DRIVE WITH MULTI-ELECTRON CYCLOTRON RESONANCES DURING NON-INDUCTIVE START-UP ON LATE

H. TANAKA, Y. NOZAWA, M. UCHIDA, R. KAJITA, Y. OMURA, Y. SAKAI, H. SHIRAI, J. OOTANI, K. GOTO, W. TSUKAMOTO …

Proc. 27th Int. Conf. on Fusion Energy, EX/P3-19, 2018 Peer-reviewed
Non-inductive build-up of a hot plasma by X-wave ECH/ECCD to remove initial high loop-voltage from start-up of fusion tokamaks

T. Maekawa, M. Uchida, H. Tanaka

NUCLEAR FUSION, 58(1) 016037, Jan, 2018 Peer-reviewed
Observation of High Impurity Ion Temperatures in ECW/EBW Sustained Plasmas on LATE

A. Ejiri, H. Tanaka, W. Takahashi, A. Sato, Y. Takase, N. Tsujii, M. Uchida, T. Makekawa

Plasma and Fusion Research, 12 1202041-1202041, 2017 Peer-reviewed
Non-inductive initiation of closed flux surfaces by ECH/ECCD on KSTAR using an oblique fundamental O-mode injection from the low-field side

H. Tanaka, M. Uchida, T. Maekawa, Y-S. Bae, M. Joung, J. H. Jeong

NUCLEAR FUSION, 56(4) 046003, Apr, 2016 Peer-reviewed
Shift in principal equilibrium current from a vertical to a toroidal one towards the initiation of a closed flux surface in ECR plasmas in the LATE device

Kengoh Kuroda, Manato Wada, Masaki Uchida, Hitoshi Tanaka, Takashi Maekawa

PLASMA PHYSICS AND CONTROLLED FUSION, 58(2) 024013, Feb, 2016 Peer-reviewed
Non-inductive production of extremely overdense spherical Tokamak plasma by electron bernstein wave excited via O-X-B method in LATE

H. Tanaka, M. Uchida, T. Maekawa

Proc. 26th Int. Conf. on Fusion Energy (Kyoto), EX/P4-45, 2016 Peer-reviewed
Cross-field potential hill arisen eccentrically in toroidal electron cyclotron resonance plasmas in the Low Aspect ratio Torus Experiment device to regulate electron and ion flows from source to boundary

Kengoh Kuroda, Manato Wada, Masaki Uchida, Hitoshi Tanaka, Takashi Maekawa

PLASMA PHYSICS AND CONTROLLED FUSION, 57(7) 075010, Jul, 2015 Peer-reviewed
Non inductive formation of an extremely overdense spherical Tokamak by electron Bernstein wave heating and current drive on LATE

Masaki Uchida, Yuto Noguchi, Hitoshi Tanaka, Takashi Maekawa

EC18 - 18TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING, 87, 2015
Circular TE11-based waveguide polarizer for efficient coupling to electron Bernstein wave

Yuto Noguchi, Masakazu Hibino, Masaki Uchida, Hitoshi Tanaka, Takashi Maekawa

Plasma Physics and Controlled Fusion, 55(12), Dec, 2013 Peer-reviewed
Development of a compact thermal lithium atom beam source for measurements of electron velocity distribution function anisotropy in electron cyclotron resonance plasmas

T. Nishioka, T. Shikama, S. Nagamizo, K. Fujii, H. Zushi, M. Uchida, A. Iwamae, H. Tanaka, T. Maekawa, M. Hasuo

REVIEW OF SCIENTIFIC INSTRUMENTS, 84(7), Jul, 2013 Peer-reviewed
Open field equilibrium current and cross-field passing electrons as an initiator of a closed flux surface in EC-heated toroidal plasmas

T. Maekawa, T. Yoshinaga, M. Uchida, F. Watanabe, H. Tanaka

NUCLEAR FUSION, 52(8), Aug, 2012 Peer-reviewed
会議報告「第24回 IAEA 核融合エネルギー会議（FEC）」

長﨑百伸, 高橋幸司, 井手俊介, 打田正樹, 政宗貞男, 鈴木康浩, 白神宏之, 関洋治

プラズマ・核融合学会誌，89，1，60，65，2012, 2012 Peer-reviewed
Detection of vertical charge separation current in a toroidal ECR plasma by radially aligned multi-electrodes

Kengoh Kuroda, Masaki Uchida, Hitoshi Tanaka, Takashi Maekawa

Plasma and Fusion Research, 7(2012), 2012 Peer-reviewed
Improvement of ec-driven spherical tokamak discharge by a radial magnetic perturbation on energetic trapped electrons

Fumitake Watanabe, Masaki Uchida, Hitoshi Tanaka, Takashi Maekawa

Plasma and Fusion Research, 7(2012), 2012 Peer-reviewed
Development of an ion beam probe system for potential measurement in the low aspect-ratio torus experiment device

Hitoshi Tanaka, Shota Omi, Jun Katsuma, Yurie Yamamoto, Masaki Uchida, Takashi Maekawa, Harukazu Iguchi

IEEJ Transactions on Fundamentals and Materials, 132(7) 18-573, 2012 Peer-reviewed
Soft X-Ray CT Imaging of a Low-Aspect-Ratio Toroidal Plasma Maintained Solely by Electron Cyclotron Heating

Hitoshi Tanaka, Tetsuro Takeuchi, Masaki Uchida, Takashi Maekawa

IEEE TRANSACTIONS ON PLASMA SCIENCE, 39(11) 2480-2481, Nov, 2011 Peer-reviewed
Generation of initial closed flux surfaces by ECH at a conventional aspect ratio of R/a similar to 3: experiments on the LATE device and JT-60U tokamak

M. Uchida, T. Maekawa, H. Tanaka, S. Ide, Y. Takase, F. Watanabe, S. Nishi

NUCLEAR FUSION, 51(6), Jun, 2011 Peer-reviewed
Study of Electron Orbits for Formation of Toroidal Closed Flux Surface by ECH

Takashi Maekawa, Tomokazu Yoshinaga, Hitoshi Tanaka, Masaki Uchida, Fumitake Watanabe

PLASMA SCIENCE & TECHNOLOGY, 13(3) 342-346, Jun, 2011 Peer-reviewed

Misc.

Non-inductive startup of spherical torus by electron Bernstein waves using 2.45GHz and 5GHz microwaves on LATE

Masaki Uchida, Yoshitaka Nozawa, Ryusuke Kajita, Junki Ootani, Keisuke Gotou, Wataru Tsukamoto, Tetsuo Noguchi, Hitoshi Tanaka, Takashi Maekawa

US-EU-Japan RF Heating Technology/US-Japan RF Heating Physics WS, 2018 Lead author
Modelling of non-inductive current generation upon superposition of vertical field on EC heated plasma in the LATE device

T. Maekawa, K. Kuroda, M. Wada, M. Uchida, H. Tanaka

42nd EPS Conf. on Plasma Phys., (P5.149), 2015
Observation of toroidal and vertical currents in EC heated plasmas under vertical field in the LATE device

K. Kuroda, M. Wada, M. Uchida, H. Tanaka, T. Maekawa

42nd EPS Conf. on Plasma Phys., (P5.150), 2015
Formation of microwave spherical torus by electron Bernstein wave heating and current drive on LATE

Masaki Uchida, Yoshitaka Nozawa, Atsushi Yoshida, Kenichi Nagao, Manato Wada, Kengoh Kudora, Hithosi Tanaka, Takashi Maekawa

Plasma Conference 2014, (21aE-3), 2014
Observation of Intermittent Plasma Ejection from a Highly Overdense Spherical Tokamak Plasma Maintained by Electron Bernstein Wave Heating and Current Drive in LATE

H. Tanaka, M. Uchida, T. Maekawa, K. Kuroda, C. Ikeda, T. Shigemura, K. Nagao, M. Wada

Proc. 25th Int. Conf. on Fusion Energy (Saint Petersburg, Russia), (EX/P7-41), 2014 Peer-reviewed
Non-inductive Start-up by ECH in KSTAR

H. Tanaka, T. Maekawa, M. Uchida, K. Nagasaki, K. Hada, Y.S. Bae, M. Joung, J.H. Jeong

Japan-Korea Workshop on Physics and Technology of Heating and Current Drive，Hanwha Resort, Haeunde, Busan, Korea，2013.1.28-30, 2013 Peer-reviewed
Noninductive Formation of Spherical Tokamak at 7 Times the Plasma Cutoff Density by Electron Bernstein Wave Heating and Current Drive on LATE

M. Uchida, T. Maekawa, H. Tanaka, F. Watanabe, Y. Noguchi, K. Kuroda, S. Omi, T. Fukunaga, R. Hayashi, T. Kanemitsu …

Proc. 24th Int. Conf. on Fusion Energy (San Diego, USA), (EX/P6-18), 2012 Peer-reviewed
Generation of initial closed flux surfaces by ECH at a conventional aspect ratio of R/a similar to 3: experiments on the LATE device and JT-60U tokamak

M. Uchida, T. Maekawa, H. Tanaka, S. Ide, Y. Takase, F. Watanabe, S. Nishi

NUCLEAR FUSION, 51(6), Jun, 2011 Peer-reviewed
Effects of externally applied magnetic perturbation in a spherical tokamak plasma produced by ECH on the LATE Device

F. Watanabe, M. Uchida, H. Tanaka, T. Maekawa

38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts, 35 2 1788-1791, 2011 Peer-reviewed
Production of High Energy Tail Electrons by Electron Bernstein Waves during the Current Start-up Discharges in the LATE Device

H. Tanaka, M. Uchida, F. Watanabe, Y. Noguchi, T. Maekawa

RADIO FREQUENCY POWER IN PLASMAS: PROCEEDINGS OF THE 19TH TOPICAL CONFERENCE, 1406 481-484, 2011 Peer-reviewed
25pQA-8 Measurement of plasma space potential profile by ion beam probing in the LATE device

Tanaka Hitoshi

Meeting abstracts of the Physical Society of Japan, 65(2) 199-199, Aug 18, 2010
26pQJ-4 Formation of initial closed flux surfaces at various aspect ratios by ECH

Uchida M., Watanabe E., Nishi S., Tanaka H., Maekawa T.

Meeting abstracts of the Physical Society of Japan, 65(2) 208-208, Aug 18, 2010
26pQJ-5 Externally Applied Magnetic Perturbation Experiments of a Spherical Tokamak Plasma by ECH on the LATE Device

Watanabe F., Uchida M., Tanaka H., Maekawa T.

Meeting abstracts of the Physical Society of Japan, 65(2) 208-208, Aug 18, 2010
26pQJ-2 Circulation of vertical charge separation current in toroidal ECR plasmas

Maekawa Takashi, Nishi Seiji, Sakabe Tomohisa, Uchida Masaki, Tanaka Hitoshi

Meeting abstracts of the Physical Society of Japan, 65(2) 207-207, Aug 18, 2010
26pQJ-3 Circulation of vertical charge separation current in toroidal ECR plasmas

Maekawa Takashi, Nishi Seiji, Sakabe Tomohisa, Uchida Masaki, Tanaka Hitoshi

Meeting abstracts of the Physical Society of Japan, 65(2) 208-208, Aug 18, 2010
28pYP-5 Measurement of velocity and spatial distribution of high energy tail electrons carrying the plasma current in Microwave Spherical tokamak plasmas

Tanaka Hitoshi

Meeting abstracts of the Physical Society of Japan, 64(2) 148-148, Aug 18, 2009
Non-Inductive Start-up and Formation of Spherical Torus by Using Electron Cyclotron Range of Frequency on LATE

M. Uchida, H. Tanaka, T. Maekawa

RADIO FREQUENCY POWER IN PLASMAS, 1187 503-506, 2009
Start-up and Formation of Spherical Torus Plasma by Electron Cyclotron Heating and Current Drive

M. Uchida, H. Tanaka, T. Maekawa

Proc. 36th EPS Conference on Plasma Phys., ECA 33E, P5-156, 2009
Non-Inductive Start-up and Formation of Spherical Torus by Using Electron Cyclotron Range of Frequency on LATE

M. Uchida, H. Tanaka, T. Maekawa

RADIO FREQUENCY POWER IN PLASMAS, 1187 503-506, 2009 Peer-reviewed
UTILIZATION OF ELECTRON BERNSTEIN WAVE HEATING AND CURRENT DRIVE FOR TOKAMAK STARTUP AND ADVANCED OPERATIONS

H. Tanaka, T. Maekawa, M. Uchida, S. Nishi, H. Igami, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Takahashi, J. Miyazawa …

ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING, 96-+, 2009 Peer-reviewed

Research Projects

電子サイクロトロン加熱による超伝導トカマク起動法の開発

科学研究費助成事業, 基盤研究(B), 日本学術振興会, Apr, 2021 - Mar, 2024

打田正樹, 田中仁
Non-inductive start-up of spherical tokamak by combination of electron beam injection and electron Bernstein heating

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2021

Tanaka Hitoshi
Intermittent plasma bursts across the last closed flux surface in a highly overdense spherical torus generated by electron Bernstein wave heating

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2021

Uchida Masaki
Non inductive buildup of keV plasma using X-wave in fusion tokamak

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2020

MAEKAWA Takashi
Non-inductive formation of overdense spherical tokamak with EB wave in the first propagation band by Gaussian beams

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, Jun, 2014 - Mar, 2017

Tanaka Hitoshi
Research on formation of closed flux surfaces in large tokamaks using ECH/ECCD

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2017

Maekawa Takashi
Electron Bernstein heating at an extremely overdense torus plasma

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2012 - Mar, 2015

UCHIDA Masaki, MAEKAWA Takashi, TANAKA Hitoshi, TOI Kazuo, ISOBE Mitsutaka
Improvement of ECH-driven plasma current startup by control of pitch angles of fast tail electrons

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2011 - Mar, 2014

MAEKAWA Takashi, TANAKA Hitoshi, UCHIDA Masaki
Study on the electrostatic potential in the formation of closed magnetic configuration

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2011 - Mar, 2014

TANAKA Hitoshi, MAEKAWA Takashi, UCHIDA Masaki
Charge separation current in a electron cyclotron heated torus plasma

Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, 2010 - 2011

UCHIDA Masaki
Study of non-inductive formation of magnetic surface by ECH for start-up of super conducting tokamaks

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, 2008 - 2010

MAEKAWA Takashi, TANAKA Hitoshi, UCHIDA Masdaki
Study on magnetic reconnection driven by electromagnetic energy

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, 2007 - 2009

TANAKA Hitoshi, MAEKAWA Takashi, UCHIDA Masaki, SHIBATA Kazunari, NISHINO Nobuhiro, NISHI Seiji
Study on Magnetic Reconection Caused by Electromagnetic Energy

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, 2005 - 2006

TANAKA Hitoshi, MAEKAWA Takashi, UCHIDA Masaki
軟X線CTによるECH球状トカマクプラズマの観測

科学研究費助成事業, 若手研究(B), 日本学術振興会, 2003 - 2004

打田正樹
Start-Up and Formation of Spherical Tokamak Equilibria by Electron Bernstein Wave Current Drive

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, 2002 - 2004

MAEKAWA Takashi, TANAKA Hitoshi, UCHIDA Masaki, WAKATANI Masahiro, NAGAYAMA Yoshio, KONDO Katsumi
Formation and Sustainment of Spherical Tokamak by Electron Cyclotron Heating

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, 2001 - 2002

TANAKA Hitoshi, KUBO Shin, UCHIDA Masaki, MAEKAWA Takashi
Observation of Three Dimensional Heat Flow in Disruptive Processes in Tokamak Plasma

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, 2000 - 2001

TAKASHI Maekawa, TERUMICHI Yasushi, UCHIDA Masaki, TANAKA Hitoshi, NAGAYAMA Yoshio

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