英国皇家物理学会期刊
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作者:T. Kobayashi , K. Itoh ...
来源:[J].Nuclear Fusion(IF 2.734), 2014, Vol.54 (7)IOP
摘要:In the JFT-2M tokamak (JFT standing for JAERI Fusion Torus), the limit cycle oscillation (LCO), together with several variables, i.e., the electrostatic potential, radial electric field, electron density, turbulence intensity, and D α emission from the divertor ...
作者:T. Kobayashi , S. Moriyama K. Yokokura ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (6)IOP
摘要:A gyrotron enabling high-power, long-pulse oscillations at both 110 and 138 GHz has been developed for electron cyclotron heating (ECH) and current drive (CD) in JT-60SA. Oscillations of 1 MW for 100 s have been demonstrated at both frequencies, for the first time in the wor...
作者:T. Kobayashi , K. Itoh ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (6)IOP
摘要:This article presents a radial electric field measurement by a heavy ion beam probe in the JFT-2M tokamak, during the L-H transition. An abrupt increase (time scale of O(100 µ s)) of the strong edge radial electric field (localized in the radius with FWHM ∼7 mm) results in t...
作者:T. Kobayashi , K. Itoh ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (7)IOP
摘要:In this paper, we elaborate the electric field excitation mechanism during the L–H transition in the JFT-2M tokamak. Using time derivative of the Poisson’s equation, models of the radial electric field excitation is examined. The sum of the loss-cone loss current and the neo...
作者:T. Kobayashi , K. Ida ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (7)IOP
摘要:In this contribution we analyze modulation electron cyclotron resonance heating (MECH) experiment and discuss higher harmonic frequency dependence of transport coefficients. We use the bidirectional heat pulse propagation method, in which both inward propagating heat pulse and ou...
作者:T. Kobayashi , M. Yoshinuma ...
来源:[J].Nuclear Fusion(IF 2.734), 2016, Vol.56 (9)IOP
摘要:Bifurcation physics of a magnetic island was investigated using the heat pulse propagation technique produced by the modulation of electron cyclotron heating. There are two types of bifurcation phenomena observed in a large helical device (LHD) and DIII-D. One is a bifurcation of...
作者:T. Kobayashi , A. Isayama ...
来源:[J].Nuclear Fusion(IF 2.734), 2011, Vol.51 (10), pp.103037 (10pp)IOP
摘要:A new gyrotron operation technique to increase oscillation efficiency was developed using the JT-60 electron cyclotron range of frequency (ECRF) system. In order to increase the efficiency without a significant increase in the anode leakage current by trapped electrons that limit...
作者:T. Kobayashi , Y. Nagashima ...
来源:[J].Nuclear Fusion(IF 2.734), 2014, Vol.54 (11)IOP
摘要:Meso-scale streamer has a radially elongated structure and is believed to enhance the radial transport. In order to study the control of the streamer, we demonstrated an end plate biasing to the streamer state in the PANTA linear plasma. During the end plate biasing, the electron...
作者:T. Kobayashi , S.-I. Itoh ...
来源:[J].Nuclear Fusion(IF 2.734), 2014, Vol.54 (11)IOP
摘要:Non-linear coupling between fluctuations at different radial locations is observed on the Large Helical Device (LHD) plasma. The summed bi-coherence between the low frequency macro-scale fluctuation (frequency is f = 2.75 kHz) at ρ = r eff/ a 99 = 0.63 ...
作者:T. Kobayashi , C. Moon ...
来源:[J].Nuclear Fusion(IF 2.734), 2015, Vol.55 (12)IOP
摘要:The central electron temperature has successfully reached up to 7.5 keV in large helical device (LHD) plasmas with a central high-ion temperature of 5 keV and a central electron density of m−3. This result was obtained by heating with a newly-installed 154 GHz gyr...

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