[Table of Contents]

Plasma and Fusion Research

Volume 10, 1203002 (2015)

Rapid Communications

Test of the Telegraph Equation for Transport Dynamics in Plasma
Shigeru INAGAKI1,2), Kimitaka ITOH2,3), Sanae-I. ITOH1,2), Yusuke KOSUGA4), Maxime LESUR1) and Naohiro KASUYA1,2)
1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
2)
Research Center for Plasma Turbulence, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
3)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
4)
Institute for Advanced Study, Kyushu University, Higashi-ku, Fukuoka 812-8581, Japan
(Received 26 July 2014 / Accepted 5 November 2014 / Published 30 January 2015)

Abstract

We have tested the telegraph equation for transport dynamics in magnetized plasma by comparing its results with experimental observations in the Large Helical Device [S. Inagaki et al., Nucl. Fusion 53, 113006 (2013)]. The telegraph equation includes a finite relaxation time for turbulence intensity in response to the changes in global plasma parameters. This model was applied to nondiffusive radial heat pulse propagation under the periodic modulation of the heating power. The model showed some success in reproducing the amplitudes of higher harmonics. However, the phase relation between the temperature gradient and heat flux was opposite to that in experimental observations.

Keywords

heat pulse propagation, telegraph equation, transport dynamics

DOI: 10.1585/pfr.10.1203002

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References

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This paper may be cited as follows:

Shigeru INAGAKI, Kimitaka ITOH, Sanae-I. ITOH, Yusuke KOSUGA, Maxime LESUR and Naohiro KASUYA, Plasma Fusion Res. 10, 1203002 (2015).