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Hiroshi Idei Last modified date:2017.09.15



Graduate School


Homepage
http://www.triam.kyushu-u.ac.jp/ideiken/index.html
Academic Degree
Dr. of Science
Field of Specialization
Plasma Physics, Nuclear Fusion Research
Outline Activities
Noni-inductive plasma current start-up and sustainment have been studied on Spherical Tokamak (ST) QUEST plasmas in Advanced Fusion Research Center. Stet-up of Center Solenoid (CS) coils used for inductive plasma start-up is difficult in the ST devices due to the limited area. Advanced fusion reactor design beyond the ST type has been optimized to reduce the CS part. Noni-inductive plasma current start-up and sustainment is one of most important issues in fusion development. In order to sustain high density plasma, incident electromagnetic waves should be sometimes converted into electrostatic waves in the plasma. Plasma diagnostics on density and emission measurements to study the wave-conversion process has been engaged. In plasma diagnostics, remote-sensing technique is used. Some collaborations have been conducted with different fields. RF or millimeter-wave components have been developed for the remote-sensing and plasma heating and current drive in high temperature plasmas. I have education activities on the plasma heating using radio frequency at Advanced Energy Engineering Science, Interdisciplinary Graduate School of Engineering Sciences.
Research
Research Interests
  • Plasma Start-up and Sustainment using High Power Millimeter Waves
    keyword : Gyrotron, Plasma Current Start-up
    2014.04.
  • Development of Fast directional switch system in millimeter wave transmission.
    keyword : FADIS, NTM
    2012.04.
  • Propagating mode analysis and diagnostics development in high-power millimeter wave transmission lines.
    keyword : Circular Corrugated Waveguide
    2009.04.
  • Development of high-purity HE11-mode exciter
    keyword : Circular Corrugated Waveguide
    2009.04.
  • Electron Bernstein Wave Heating and Current Drive Experiments in QUEST
    keyword : Electron Bernstein Wave, QUEST, RF Heating, Current Drive
    2008.04.
  • Electron Bernstein Wave Emission Diagnostics in QUEST
    keyword : QUEST, Electron Bernstein Wave, Radiometer
    2008.04The radiometer system to measure Electron Bernstein Emission is developing for the QUEST. The time evolutions of electron temperature profiles can be diagnosed from the measurement. The mode conversion process from Electron Cyclotron Wave (electromagnetic wave) to Electron Bernstein Wave (electrostatic wave) is analyzed for the emission measurement..
  • Density Profile and Fluctuation Measurements in Reflectometry on the QUEST
    keyword : QUEST, Reflectometry, Density fluctuation
    2008.04The reflectometry system to measure the density profile / fluctuation is developing for the QUEST. .
  • Development of New Antenna System for Electron Bernstein Heating and Current Drive in QUEST
    keyword : Electron Bernstein Wave, QUEST , RF Heating, Current Drive
    2006.04.
  • Electron Bernstein Wave Heating and Current Drive Experiments in CPD
    keyword : Electron Bernstein Wave, CPD, RF Heating, Current Drive
    2006.04~2008.03.
  • Diagnostics using Electromagnetic wave in CPD Experiments
    keyword : Electron Bernstein Wave, CPD, Reflectometry, Radiometer
    2006.04.
  • Evolution of Full Stokes Parameters in Polarized Radiative Transfer of Electron Cyclotron Wave
    keyword : electron cyclotron waves, wave polarization, Stokes parameters, dichroism, birefringence
    1998.04~2003.03Evolution of Full Stokes Parameters in Polarization Transfer of Electron Cyclotron Waves, The general evolution equation of Full Stokes parameters has been obtained for Electron Cyclotron Wave propagation. The effects of both the dichroism and the birefringence are taken into consideration. Arbitary oblique propagation to the magnetic field may be treated. The incident wave polarization for Electron Cyclotron Heating / Current Drive has been optimized using this equation..
  • Development of mm-Wave Transmission Components based on Precise Phase Measurements
    keyword : phase measurement, millimeter waves, transmission components
    1998.04Development of Transmission Components based on Precise Phase Measurements for Millimeter Waves, The low power test stand has been prepared in order to measure phase profiles of propagating millimeter waves, as well as normal intensity measurments. A mirror array including phase-correcting mirrors and a power/propagating-axis monitor and so on have been developed using this test stand..
  • Electron Cyclotron Heating / Current Drive Experiments using Remote Steering Antenna
    keyword : Remote Steering Antenna, Electron Cyclotron Heating, Electron Cyclotron Current Drive
    2003.04~2006.03Electron Cyclotron Heating / Current Drive Experiments using Remote Steering Antenna, The remote steering antenna is developing for Electron Cyclotron Current Drive on International Thermonuclear Experimental Reactor. An actual equipment of the anttena was prepared for the TRIAM-1M tokamak. The heating / current drive experiments were begun using the antenna at the TRIAM-1M tokamak..
  • Electron Temperature and Velocity Distribution Function Diagnostics based on Electron Cyclotron Emission
    keyword : Electron Cyclotron Emission, Electron Temperature Profile, Electron Velocity Distribution Function
    2003.04.
Current and Past Project
  • US-Japan collaboration in fusion energy science and technology research Personal Exchange Program
    "Propagating-Mode Measurements in High Power Transmission Lines for Electron Cyclotron Heating"
  • US-Japan collaboration in fusion energy science and technology research Personal Exchange Program
    "Propagating-Mode Retrieval in High Power Transmission Lines for Electron Cyclotron Heating"
Academic Activities
Papers
1. Idei, Hiroshi; Kawasaki, Shohji; Zushi, Hideki; Inagaki, Shigeru; Nagayama, Yoshio; Kawahata, Kazuo; Wataya, Yuichi, Broadband radiometer system with fast frequency switching synthesizer for electron cyclotron emission measurements in LHD, 2007 JOINT 32ND INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 15TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS, VOLS 1 AND 2, 2.0, 0.0, 2007.09.
2. Idei, Hiroshi; Kawasaki, Shouji; Hanada, Kazuaki; Zushi, Hideki; Sakamoto, Kohnosuke Sato Kazuo Nakamura Mizuki; Hasegawa, Makoto; Nakashima, Hisatoshi; Higashijima, Aki; Wataya, Yuichi; Matsubara, Shinji; Kawano, Shuhei, Initial results of AM reflectometory on CPD, 2007 JOINT 32ND INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 15TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS, VOLS 1 AND 2, 0.0, 0.0, 2.0, 2007.09.
3. Idei, Hiroshi; Shapiro, Michael; Temkin, Richard J.; Shimozuma, Takashi; Kubo, Shin, Mode content analysis in circular corrugated waveguide using radiated field, 2007 JOINT 32ND INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 15TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS, VOLS 1 AND 2, 0.0, 0.0, 2.0, 0.0, 2007.04.
4. Idei, Hiroshi; Shimozuma, Takashi; Shapiro, Michael A.; Notake, Takashi; Kubo, Shin; Temkin, Richard J., Experimental verification of phase retrieval of quasi-optical millimeter-wave beams, IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 54.0, 11.0, 7.0, 2006.11.
5. Idei, H; Hanada, K; Zushi, H; Ohkubo, K; Hasegawa, M; Kubo, S; Nishi, S; Fukuyama, A; Sato, KN; Nakamura, K; Sakamoto, M; Yomasa, A; Kawasaki, S; Nakashima, H; Higashijima, A; Notake, T; Shimozuma, T; Ito, S; Hoshika, H; Maezono, N; Nakashima, K; Ogawa, M, Electron cyclotron current drive experiments in LHCD plasmas using a remote steering antenna on the TRIAM-1M tokamak, NUCLEAR FUSION, 46.0, 5.0, 11.0, 0.0, 2006.05.
6. Wataya, Y.; Idei, H.; Inagaki, S.; Shimozuma, T.; Nagayama, Y.; Kawahata, K.; Zushi, H., Wide-band heterodyne-radiometer with fast frequency-switching local oscillator for electron cyclotron emission diagnostics, Conference Digest of the 2006 Joint 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics, 0.0, 0.0, 1.0, 0.0, 2006.04.
7. Idei, Hiroshi; Shimozuma, Takashi; Shapiro, Michael; Temkin, Richard; Notake, Takashi; Ito, Satoshi; Kubo, Shin; Ohkubo, Kunizo; , Quasi-optical beam analysis based on direct phase measurement at low power level, Journal of Plasma and Fusion Research, 81.0, 3.0, 2005.01.
Presentations
1. , [URL].
2. Mode Content Analysis in Circular Corrugated Waveguide using Radiated Field.
3. Development of Launcher System for Electron Bernstein Wace Heating and Current Drive in QUEST.
4. AM reflectometer in CPD.
5. Broadband radiometer system with fast frequency switching synthesizer for electron cyclotron emission measurements in LHD.
6. , [URL].
7. , [URL].
8. , [URL].
9. , [URL].
10. Operation Range of Remote Steering Antenna in Symmetric and Asymmetric Modes.
11. Wide-Band Radiometer for Electron Cyclotron Emission Diagnostics with Fast-Switching Local Oscillator.
12. Fundamental X-mode Electron Cyclotron Current Drive using Remote-Steering Symmetric Direction Antenna at Larger Steering Angles.
13. Remote Steering Antenna System on the TRIAM-1M tokamak.
14. Remote Steering Antenna System and Its Application to ECH/ECCD Experiments on the TRIAM-1M tokamak.
Educational