Speaker
Dr
Tatsuya Kobayashi
(National Institute for Fusion Science)
Description
Recent studies have indicated that the local theory of the electron heat transport cannot model the plasma response against the modulation electron cyclotron resonance heating (MECH) correctly. In this paper we propose a new method to analyze the MECH experiment, aiming to examine the local transport model. The method is applied to the MECH experiments performed in the helical (LHD and TJ- II) and tokamak (KSTAR and DIII-D) devices, having different parameters. The experiments are performed in steady state L-mode plasmas. By changing the MECH deposition location, the outward and inward propagating heat pulses are produced that are measured with Electron Cyclotron Emission (ECE) systems. The thermal diffusivity and the thermal convective velocity are obtained not only at the fundamental MECH frequency but also at its higher harmonics, as well as from both outward and inward propagating pulses, providing different transport coefficients at a radial region. These results clearly show the universality of the violation of the local transport model.
| Country or International Organization | Japan |
|---|---|
| Paper Number | EX/P8-15 |
Primary author
Dr
Tatsuya Kobayashi
(National Institute for Fusion Science)
Co-authors
Dr
Carlos Hidalgo
(CIEMAT)
Dr
Chanho Moon
(National Institute for Fusion Science)
Dr
Daniel López-Bruna
(CIEMAT)
Prof.
Gunsu YUN
(Pohang University of Science and Technology)
Mr
Gyueng Hyuen Choe
(Pohang University of Science and Technology)
Dr
Hayato Tsuchiya
(National Institute for Fusion Science)
Dr
Hiroe Igami
(National Institute for Fusion Science)
Prof.
Hyeon K. Park
(UNIST)
Dr
Katsumi Ida
(National Institute for Fusion Science)
Prof.
Kimitaka Itoh
(NIFS)
Dr
M. A. Ochando
(CIEMAT)
Dr
Matthijs, van Berkel
(FOM Institute DIFFER - Dutch Institute for Fundamental Energy Research)
Dr
Max Austin
(University of Texas)
Dr
Morgan Shafer
(Oak Ridge National Laboratory)
Prof.
Sanae Itoh
(Research Institute for Applied Mechanics, Kyushu University)
Dr
Shigeru Inagaki
(Kyushu University)
Dr
Teresa Estrada
(CIEMAT)
Dr
Todd E. Evans
(General Atomics)
Dr
Toru, Ii Tsujimura
(National Institute for Fusion Science)
Dr
Won Ha Ko
(Korea, Republic of)
Dr
Yasuo Yoshimura
(National Institute for Fusion Science)
