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Daido, Hiroyuki*; Yamada, Tomonori; Furukawa, Hiroyuki*; Ito, Chikara; Miyabe, Masabumi; Shibata, Takuya; Hasegawa, Shuichi*
Journal of Laser Applications, 33(1), p.012001_1 - 012001_16, 2021/02
Times Cited Count：2 Percentile：24.82(Materials Science, Multidisciplinary)Kikuchi, Mitsuru; Fasoli, A.*; Takizuka, Tomonori*; Diamond, P. H.*; Medvedev, S.*; Wu, Y.*; Duan, X.*; Kishimoto, Yasuaki*; Hanada, Kazuaki*; Pueschel, M. J.*; et al.
Proceedings of 8th IAEA Technical Meeting on Steady State Operation of Magnetic Fusion Devices (CD-ROM), 20 Pages, 2015/05
The standard D shaped H-mode operation showed excellent plasma confinement ut has important issues of transient and steady state heat flux. To solbe this issues, we proposed new scenario using plasma shaping as one of possible scenario of future tokamak reactor.
Kikuchi, Mitsuru; Takizuka, Tomonori*; Furukawa, Masaru*
JPS Conference Proceedings (Internet), 1, p.015014_1 - 015014_4, 2014/03
Recent scaling of SOL e-folding length by Goldston shows pessimistic prediction to ITER and DEMO. This seems caused by the SOL acceleration mechanism found by Takizuka. In the negative D shaped plasma, this SOL acceleration may be significantly reduced. Negative D also has TEM eigen mode structure tilted poloidally and confinement in L mode is two times of L-mode. Based on these facts, we discuss possibility of negative D as a possible operation candidate of tokamak.
Sakanaka, Shogo*; Ago, Tomonori*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; Harada, Kentaro*; Hiramatsu, Shigenori*; Honda, Toru*; et al.
Proceedings of 11th European Particle Accelerator Conference (EPAC '08) (CD-ROM), p.205 - 207, 2008/06
Future synchrotron light sources based on the energy-recovery linacs (ERLs) are expected to be capable of producing super-brilliant and/or ultra-short pulses of synchrotron radiation. Our Japanese collaboration team is making efforts for realizing an ERL-based hard X-ray source. We report recent progress in our R&D efforts.
Kawasaki, Nobuchika; Felix, S.; Kasahara, Naoto; Furukawa, Tomonori*; Komura, Shinobu*; Yagawa, Genki*
PNC TY9602 97-001, 26 Pages, 1997/04
None
Kikuchi, Mitsuru; Takizuka, Tomonori*; Furukawa, Masaru*
no journal, ,
APTWG is an international conference on plasma transport organized by Japan, China and Korea. 3rd APTWG will be held at Jeju and the chairman of the organizing committee (Prof. Diamond, director of WCI fusion theory center, NFRI) asked to give an plenary talk. The talk will address issues of heat flux scaling by R. Goldston and negative D shape plasma will be discussed as its counter measure.
Kikuchi, Mitsuru; Takizuka, Tomonori*; Furukawa, Masaru*
no journal, ,
Assessment of negative triangular tokamak is reported. With negative delta, we can increase major radius of the divertor plate by 2.5 and also by 
3 using snowfrake leading to 7 times lower heat flux.
Kikuchi, Mitsuru; Fasoli, A.*; Takizuka, Tomonori*; Diamond, P.*; Medvedev, S.*; Duan, X.*; Zushi, Hideki*; Furukawa, Masaru*; Kishimoto, Yasuaki*; Wu, Y.*; et al.
no journal, ,
Power and particle control is challenging for standard D-shaped H-mode scenario in tokamak. Possibility of negative triangularity as innovative tokamak concept is discussed by Kikuchi et al. Experimental and numerical studies of negative triangular plasma at CRPP-EPFL success-fully demonstrated improved connement and the weakening of the SOL flow acceleration is implied for the negative triangularity. Recent studies on mechanism of type II and grassy ELM show importance of closure of second stability access to achieve small ELM regimes and also kinetic effects. Medvedev showed that closure of second stability also occurs for negative triangularity. But the MHD stability in negative triangularity is a bit more complicated so that closure of second stability does not imply easy access to small ELM regimes. We discuss critical elements behind.
Kikuchi, Mitsuru; Takizuka, Tomonori*; Furukawa, Masaru*
no journal, ,
While negative triangular tokamak configuration has possibility to improve power handling capability, mechanism of improved confinement observed in TCV is still not fully understood. In this talk, we will summarize present understanding of linear eigenmode structure of toroidal drift waves and also flow shear suppression of turbulence.
Daido, Hiroyuki*; Yamada, Tomonori; Ito, Chikara; Miyabe, Masabumi; Shibata, Takuya; Furukawa, Hiroyuki*; Hasegawa, Shuichi*
no journal, ,
Daido, Hiroyuki*; Yamada, Tomonori; Ito, Chikara; Miyabe, Masabumi; Shibata, Takuya; Furukawa, Hiroyuki*; Hasegawa, Shuichi*
no journal, ,
no abstracts in English
Daido, Hiroyuki*; Yamada, Tomonori; Ito, Chikara; Miyabe, Masabumi; Shibata, Takuya; Furukawa, Hiroyuki*; Hasegawa, Shuichi*
no journal, ,
no abstracts in English
