Higher Harmonics in a Perturbative Transport Experiment

Shigeru INAGAKI; Sanae-I. ITOH; Kimitaka ITOH; Naohiro KASUYA; Tatsuya KOBAYASHI; Akihide FUJISAWA; Tokihiko TOKUZAWA; Katsumi IDA; Shin KUBO; Takashi SHIMOZUMA; Naoki TAMURA; Hayato TSUCHIYA; Yoshio NAGAYAMA; Kazuo KAWAHATA; Hiroshi YAMADA; Akio KOMORI; LHD Experiment Group

doi:10.1585/pfr.8.1202173

Rapid Communications

Higher Harmonics in a Perturbative Transport Experiment

Shigeru INAGAKI, Sanae-I. ITOH, Kimitaka ITOH, Naohiro KASUYA, Tatsuya KOBAYASHI, Akihide FUJISAWA, Tokihiko TOKUZAWA, Katsumi IDA, Shin KUBO, Takashi SHIMOZUMA, Naoki TAMURA, Hayato TSUCHIYA, Yoshio NAGAYAMA, Kazuo KAWAHATA, Hiroshi YAMADA, Akio KOMORI, LHD Experiment Group

Author information

Shigeru INAGAKI
Research Institute for Applied Mechanics, Kyushu University
Itoh Research Center for Plasma Turbulence, Kyushu University
Sanae-I. ITOH
Research Institute for Applied Mechanics, Kyushu University
Itoh Research Center for Plasma Turbulence, Kyushu University
Kimitaka ITOH
Itoh Research Center for Plasma Turbulence, Kyushu University
National Institute for Fusion Science
Naohiro KASUYA
Research Institute for Applied Mechanics, Kyushu University
Itoh Research Center for Plasma Turbulence, Kyushu University
Tatsuya KOBAYASHI
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Akihide FUJISAWA
Research Institute for Applied Mechanics, Kyushu University
Itoh Research Center for Plasma Turbulence, Kyushu University
Tokihiko TOKUZAWA
National Institute for Fusion Science
Katsumi IDA
Itoh Research Center for Plasma Turbulence, Kyushu University
National Institute for Fusion Science
Shin KUBO
National Institute for Fusion Science
Takashi SHIMOZUMA
National Institute for Fusion Science
Naoki TAMURA
National Institute for Fusion Science
Hayato TSUCHIYA
National Institute for Fusion Science
Yoshio NAGAYAMA
National Institute for Fusion Science
Kazuo KAWAHATA
National Institute for Fusion Science
Hiroshi YAMADA
National Institute for Fusion Science
Akio KOMORI
National Institute for Fusion Science
LHD Experiment Group

Keywords: heat-pulse propagation, higher harmonics, nondiffusive transport

JOURNAL FREE ACCESS

2013 Volume 8 Pages 1202173

DOI https://doi.org/10.1585/pfr.8.1202173

Details

Abstract

We have used the convolution method to obtain higher harmonics of the temperature perturbation in a heating modulation experiment on LHD plasma. In comparison with predictions based on the diffusive model, amplitudes of higher harmonics (such as the seventh) decayed much more slowly as they propagated radially. Changes in the time derivative of temperature at the onset and turning-off of heating power remained much sharper after radial propagation than those predicted by the diffusion model.

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