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Title: Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas

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 outward propagating heat pulse are analyzed at a radial range, in order to distinguish frequency dependence of transport coefficients due to hysteresis from that due to other reasons, such as radially dependent transport coefficients, a finite damping term, or boundary effects. The method is applied to MECH experiments performed in various helical and tokamak devices, i.e. Large Helical Device (LHD), TJ-II, Korea Superconducting Tokamak Advanced Research (KSTAR), and Doublet III-D (DIII-D) with different plasma conditions. Here, the frequency dependence of transport coefficients are clearly observed, showing a possibility of existence of transport hysteresis in flux-gradient relation.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [5] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] ;  [12] ;  [12] ;  [12] ;  [13] ;  [4] ;  [4] more »;  [4] ;  [3] ;  [14] « less
  1. National Inst. for Fusion Science (NIFS), Toki (Japan). National Inst. of Natural Sciences; The Graduate Univ. for Advanced Studies (SOKENDAI), Toki (Japan)
  2. National Inst. for Fusion Science (NIFS), Toki (Japan). National Inst. of Natural Sciences; The Graduate Univ. for Advanced Studies (SOKENDAI), Toki (Japan); Kyushu Univ. (Japan). Research Center for Plasma Turbulence
  3. Kyushu Univ. (Japan). Research Center for Plasma Turbulence; Kyushu Univ. (Japan). Research Inst. for Applied Mechanics
  4. National Inst. for Fusion Science (NIFS), Toki (Japan). National Inst. of Natural Sciences
  5. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of)
  6. National Fusion Research Inst., Daejeon (Korea); Ulsan National Inst. of Science and Technology, Ulsan (Korea)
  7. National Fusion Research Inst., Daejeon (Korea)
  8. General Atomics, San Diego, CA (United States)
  9. Univ. of Texas, Austin, TX (United States)
  10. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  11. The Graduate Univ. for Advanced Studies (SOKENDAI), Toki (Japan)
  12. Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain). Lab. Nacional de Fusión
  13. Max-Planck-Inst. für Plasmaphysik, Garching (Germany)
  14. National Inst. for Fusion Science (NIFS), Toki (Japan). National Inst. of Natural Sciences; Kyushu Univ. (Japan). Research Center for Plasma Turbulence
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 57; Journal Issue: 7; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; heat transport; heat pulse propagation; modulation ECH
OSTI Identifier:
1468009

Kobayashi, T., Ida, K., Inagaki, S., Tsuchiya, H., Tamura, N., Choe, G. H., Yun, G. S., Park, H. K., Ko, W. H., Evans, T. E., Austin, M. E., Shafer, M. W., Ono, M., López-bruna, D., Ochando, M. A., Estrada, T., Hidalgo, C., Moon, C., Igami, H., Yoshimura, Y., Tsujimura, T. Ii., Itoh, S. -I., and Itoh, K.. Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas. United States: N. p., Web. doi:10.1088/1741-4326/aa6f1f.
Kobayashi, T., Ida, K., Inagaki, S., Tsuchiya, H., Tamura, N., Choe, G. H., Yun, G. S., Park, H. K., Ko, W. H., Evans, T. E., Austin, M. E., Shafer, M. W., Ono, M., López-bruna, D., Ochando, M. A., Estrada, T., Hidalgo, C., Moon, C., Igami, H., Yoshimura, Y., Tsujimura, T. Ii., Itoh, S. -I., & Itoh, K.. Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas. United States. doi:10.1088/1741-4326/aa6f1f.
Kobayashi, T., Ida, K., Inagaki, S., Tsuchiya, H., Tamura, N., Choe, G. H., Yun, G. S., Park, H. K., Ko, W. H., Evans, T. E., Austin, M. E., Shafer, M. W., Ono, M., López-bruna, D., Ochando, M. A., Estrada, T., Hidalgo, C., Moon, C., Igami, H., Yoshimura, Y., Tsujimura, T. Ii., Itoh, S. -I., and Itoh, K.. 2017. "Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas". United States. doi:10.1088/1741-4326/aa6f1f. https://www.osti.gov/servlets/purl/1468009.
@article{osti_1468009,
title = {Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas},
author = {Kobayashi, T. and Ida, K. and Inagaki, S. and Tsuchiya, H. and Tamura, N. and Choe, G. H. and Yun, G. S. and Park, H. K. and Ko, W. H. and Evans, T. E. and Austin, M. E. and Shafer, M. W. and Ono, M. and López-bruna, D. and Ochando, M. A. and Estrada, T. and Hidalgo, C. and Moon, C. and Igami, H. and Yoshimura, Y. and Tsujimura, T. Ii. and Itoh, S. -I. and Itoh, K.},
abstractNote = {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 outward propagating heat pulse are analyzed at a radial range, in order to distinguish frequency dependence of transport coefficients due to hysteresis from that due to other reasons, such as radially dependent transport coefficients, a finite damping term, or boundary effects. The method is applied to MECH experiments performed in various helical and tokamak devices, i.e. Large Helical Device (LHD), TJ-II, Korea Superconducting Tokamak Advanced Research (KSTAR), and Doublet III-D (DIII-D) with different plasma conditions. Here, the frequency dependence of transport coefficients are clearly observed, showing a possibility of existence of transport hysteresis in flux-gradient relation.},
doi = {10.1088/1741-4326/aa6f1f},
journal = {Nuclear Fusion},
number = 7,
volume = 57,
place = {United States},
year = {2017},
month = {5}
}