Flow damping due to stochastization of the magnetic field

K. Ida, M. Yoshinuma, H. Tsuchiya, T. Kobayashi, C. Suzuki, M. Yokoyama, A. Shimizu, K. Nagaoka, S. Inagaki, K. Itoh, T. Akiyama, M. Emoto, T. Evans, A. Dinklage, X. Du, K. Fujii, M. Goto, T. Goto, M. Hasuo, C. HidalgoK. Ichiguchi, A. Ishizawa, M. Jakubowski, K. Kamiya, H. Kasahara, G. Kawamura, D. Kato, M. Kobayashi, S. Morita, K. Mukai, I. Murakami, S. Murakami, Y. Narushima, M. Nunami, S. Ohdach, N. Ohno, M. Osakabe, N. Pablant, S. Sakakibara, T. Seki, T. Shimozuma, M. Shoji, S. Sudo, K. Tanaka, T. Tokuzawa, Y. Todo, H. Wang, H. Yamada, Y. Takeiri, T. Mutoh, S. Imagawa, T. Mito, Y. Nagayama, K. Y. Watanabe, N. Ashikawa, H. Chikaraishi, A. Ejiri, M. Furukawa, T. Fujita, S. Hamaguchi, H. Igami, M. Isobe, S. Masuzaki, T. Morisaki, G. Motojima, K. Nagasaki, H. Nakano, Y. Oya, Y. Suzuki, R. Sakamoto, M. Sakamoto, A. Sanpei, H. Takahashi, M. Tokitani, Y. Ueda, Y. Yoshimura, S. Yamamoto, K. Nishimura, H. Sugama, T. Yamamoto, H. Idei, A. Isayama, S. Kitajima, S. Masamune, K. Shinohara, P. S. Bawankar, E. Bernard, M. Von Berkel, H. Funaba, X. L. Huang, T. Ii, T. Ido, K. Ikeda, S. Kamio, R. Kumazawa, C. Moon, S. Muto, J. Miyazawa, T. Ming, Y. Nakamura, S. Nishimura, K. Ogawa, T. Ozaki, T. Oishi, M. Ohno, S. Pandya, R. Seki, R. Sano, K. Saito, H. Sakaue, Y. Takemura, K. Tsumori, N. Tamura, H. Tanaka, K. Toi, B. Wieland, I. Yamada, R. Yasuhara, H. Zhang, O. Kaneko, A. Komori

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The driving and damping mechanism of plasma flow is an important issue because flow shear has a significant impact on turbulence in a plasma, which determines the transport in the magnetized plasma. Here we report clear evidence of the flow damping due to stochastization of the magnetic field. Abrupt damping of the toroidal flow associated with a transition from a nested magnetic flux surface to a stochastic magnetic field is observed when the magnetic shear at the rational surface decreases to 0.5 in the large helical device. This flow damping and resulting profile flattening are much stronger than expected from the Rechester-Rosenbluth model. The toroidal flow shear shows a linear decay, while the ion temperature gradient shows an exponential decay. This observation suggests that the flow damping is due to the change in the non-diffusive term of momentum transport.

Original languageEnglish
Article number5816
JournalNature communications
Volume6
DOIs
Publication statusPublished - Jan 8 2015

Fingerprint

Magnetic Fields
Damping
damping
Magnetic fields
magnetic fields
Shear flow
shear flow
Plasmas
Plasma flow
Ions
flattening
decay
Magnetic flux
Equipment and Supplies
magnetohydrodynamic flow
ion temperature
Temperature
Thermal gradients
magnetic flux
temperature gradients

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Ida, K., Yoshinuma, M., Tsuchiya, H., Kobayashi, T., Suzuki, C., Yokoyama, M., ... Komori, A. (2015). Flow damping due to stochastization of the magnetic field. Nature communications, 6, [5816]. https://doi.org/10.1038/ncomms6816

Flow damping due to stochastization of the magnetic field. / Ida, K.; Yoshinuma, M.; Tsuchiya, H.; Kobayashi, T.; Suzuki, C.; Yokoyama, M.; Shimizu, A.; Nagaoka, K.; Inagaki, S.; Itoh, K.; Akiyama, T.; Emoto, M.; Evans, T.; Dinklage, A.; Du, X.; Fujii, K.; Goto, M.; Goto, T.; Hasuo, M.; Hidalgo, C.; Ichiguchi, K.; Ishizawa, A.; Jakubowski, M.; Kamiya, K.; Kasahara, H.; Kawamura, G.; Kato, D.; Kobayashi, M.; Morita, S.; Mukai, K.; Murakami, I.; Murakami, S.; Narushima, Y.; Nunami, M.; Ohdach, S.; Ohno, N.; Osakabe, M.; Pablant, N.; Sakakibara, S.; Seki, T.; Shimozuma, T.; Shoji, M.; Sudo, S.; Tanaka, K.; Tokuzawa, T.; Todo, Y.; Wang, H.; Yamada, H.; Takeiri, Y.; Mutoh, T.; Imagawa, S.; Mito, T.; Nagayama, Y.; Watanabe, K. Y.; Ashikawa, N.; Chikaraishi, H.; Ejiri, A.; Furukawa, M.; Fujita, T.; Hamaguchi, S.; Igami, H.; Isobe, M.; Masuzaki, S.; Morisaki, T.; Motojima, G.; Nagasaki, K.; Nakano, H.; Oya, Y.; Suzuki, Y.; Sakamoto, R.; Sakamoto, M.; Sanpei, A.; Takahashi, H.; Tokitani, M.; Ueda, Y.; Yoshimura, Y.; Yamamoto, S.; Nishimura, K.; Sugama, H.; Yamamoto, T.; Idei, H.; Isayama, A.; Kitajima, S.; Masamune, S.; Shinohara, K.; Bawankar, P. S.; Bernard, E.; Von Berkel, M.; Funaba, H.; Huang, X. L.; Ii, T.; Ido, T.; Ikeda, K.; Kamio, S.; Kumazawa, R.; Moon, C.; Muto, S.; Miyazawa, J.; Ming, T.; Nakamura, Y.; Nishimura, S.; Ogawa, K.; Ozaki, T.; Oishi, T.; Ohno, M.; Pandya, S.; Seki, R.; Sano, R.; Saito, K.; Sakaue, H.; Takemura, Y.; Tsumori, K.; Tamura, N.; Tanaka, H.; Toi, K.; Wieland, B.; Yamada, I.; Yasuhara, R.; Zhang, H.; Kaneko, O.; Komori, A.

In: Nature communications, Vol. 6, 5816, 08.01.2015.

Research output: Contribution to journalArticle

Ida, K, Yoshinuma, M, Tsuchiya, H, Kobayashi, T, Suzuki, C, Yokoyama, M, Shimizu, A, Nagaoka, K, Inagaki, S, Itoh, K, Akiyama, T, Emoto, M, Evans, T, Dinklage, A, Du, X, Fujii, K, Goto, M, Goto, T, Hasuo, M, Hidalgo, C, Ichiguchi, K, Ishizawa, A, Jakubowski, M, Kamiya, K, Kasahara, H, Kawamura, G, Kato, D, Kobayashi, M, Morita, S, Mukai, K, Murakami, I, Murakami, S, Narushima, Y, Nunami, M, Ohdach, S, Ohno, N, Osakabe, M, Pablant, N, Sakakibara, S, Seki, T, Shimozuma, T, Shoji, M, Sudo, S, Tanaka, K, Tokuzawa, T, Todo, Y, Wang, H, Yamada, H, Takeiri, Y, Mutoh, T, Imagawa, S, Mito, T, Nagayama, Y, Watanabe, KY, Ashikawa, N, Chikaraishi, H, Ejiri, A, Furukawa, M, Fujita, T, Hamaguchi, S, Igami, H, Isobe, M, Masuzaki, S, Morisaki, T, Motojima, G, Nagasaki, K, Nakano, H, Oya, Y, Suzuki, Y, Sakamoto, R, Sakamoto, M, Sanpei, A, Takahashi, H, Tokitani, M, Ueda, Y, Yoshimura, Y, Yamamoto, S, Nishimura, K, Sugama, H, Yamamoto, T, Idei, H, Isayama, A, Kitajima, S, Masamune, S, Shinohara, K, Bawankar, PS, Bernard, E, Von Berkel, M, Funaba, H, Huang, XL, Ii, T, Ido, T, Ikeda, K, Kamio, S, Kumazawa, R, Moon, C, Muto, S, Miyazawa, J, Ming, T, Nakamura, Y, Nishimura, S, Ogawa, K, Ozaki, T, Oishi, T, Ohno, M, Pandya, S, Seki, R, Sano, R, Saito, K, Sakaue, H, Takemura, Y, Tsumori, K, Tamura, N, Tanaka, H, Toi, K, Wieland, B, Yamada, I, Yasuhara, R, Zhang, H, Kaneko, O & Komori, A 2015, 'Flow damping due to stochastization of the magnetic field', Nature communications, vol. 6, 5816. https://doi.org/10.1038/ncomms6816
Ida K, Yoshinuma M, Tsuchiya H, Kobayashi T, Suzuki C, Yokoyama M et al. Flow damping due to stochastization of the magnetic field. Nature communications. 2015 Jan 8;6. 5816. https://doi.org/10.1038/ncomms6816
Ida, K. ; Yoshinuma, M. ; Tsuchiya, H. ; Kobayashi, T. ; Suzuki, C. ; Yokoyama, M. ; Shimizu, A. ; Nagaoka, K. ; Inagaki, S. ; Itoh, K. ; Akiyama, T. ; Emoto, M. ; Evans, T. ; Dinklage, A. ; Du, X. ; Fujii, K. ; Goto, M. ; Goto, T. ; Hasuo, M. ; Hidalgo, C. ; Ichiguchi, K. ; Ishizawa, A. ; Jakubowski, M. ; Kamiya, K. ; Kasahara, H. ; Kawamura, G. ; Kato, D. ; Kobayashi, M. ; Morita, S. ; Mukai, K. ; Murakami, I. ; Murakami, S. ; Narushima, Y. ; Nunami, M. ; Ohdach, S. ; Ohno, N. ; Osakabe, M. ; Pablant, N. ; Sakakibara, S. ; Seki, T. ; Shimozuma, T. ; Shoji, M. ; Sudo, S. ; Tanaka, K. ; Tokuzawa, T. ; Todo, Y. ; Wang, H. ; Yamada, H. ; Takeiri, Y. ; Mutoh, T. ; Imagawa, S. ; Mito, T. ; Nagayama, Y. ; Watanabe, K. Y. ; Ashikawa, N. ; Chikaraishi, H. ; Ejiri, A. ; Furukawa, M. ; Fujita, T. ; Hamaguchi, S. ; Igami, H. ; Isobe, M. ; Masuzaki, S. ; Morisaki, T. ; Motojima, G. ; Nagasaki, K. ; Nakano, H. ; Oya, Y. ; Suzuki, Y. ; Sakamoto, R. ; Sakamoto, M. ; Sanpei, A. ; Takahashi, H. ; Tokitani, M. ; Ueda, Y. ; Yoshimura, Y. ; Yamamoto, S. ; Nishimura, K. ; Sugama, H. ; Yamamoto, T. ; Idei, H. ; Isayama, A. ; Kitajima, S. ; Masamune, S. ; Shinohara, K. ; Bawankar, P. S. ; Bernard, E. ; Von Berkel, M. ; Funaba, H. ; Huang, X. L. ; Ii, T. ; Ido, T. ; Ikeda, K. ; Kamio, S. ; Kumazawa, R. ; Moon, C. ; Muto, S. ; Miyazawa, J. ; Ming, T. ; Nakamura, Y. ; Nishimura, S. ; Ogawa, K. ; Ozaki, T. ; Oishi, T. ; Ohno, M. ; Pandya, S. ; Seki, R. ; Sano, R. ; Saito, K. ; Sakaue, H. ; Takemura, Y. ; Tsumori, K. ; Tamura, N. ; Tanaka, H. ; Toi, K. ; Wieland, B. ; Yamada, I. ; Yasuhara, R. ; Zhang, H. ; Kaneko, O. ; Komori, A. / Flow damping due to stochastization of the magnetic field. In: Nature communications. 2015 ; Vol. 6.
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title = "Flow damping due to stochastization of the magnetic field",
abstract = "The driving and damping mechanism of plasma flow is an important issue because flow shear has a significant impact on turbulence in a plasma, which determines the transport in the magnetized plasma. Here we report clear evidence of the flow damping due to stochastization of the magnetic field. Abrupt damping of the toroidal flow associated with a transition from a nested magnetic flux surface to a stochastic magnetic field is observed when the magnetic shear at the rational surface decreases to 0.5 in the large helical device. This flow damping and resulting profile flattening are much stronger than expected from the Rechester-Rosenbluth model. The toroidal flow shear shows a linear decay, while the ion temperature gradient shows an exponential decay. This observation suggests that the flow damping is due to the change in the non-diffusive term of momentum transport.",
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T1 - Flow damping due to stochastization of the magnetic field

AU - Ida, K.

AU - Yoshinuma, M.

AU - Tsuchiya, H.

AU - Kobayashi, T.

AU - Suzuki, C.

AU - Yokoyama, M.

AU - Shimizu, A.

AU - Nagaoka, K.

AU - Inagaki, S.

AU - Itoh, K.

AU - Akiyama, T.

AU - Emoto, M.

AU - Evans, T.

AU - Dinklage, A.

AU - Du, X.

AU - Fujii, K.

AU - Goto, M.

AU - Goto, T.

AU - Hasuo, M.

AU - Hidalgo, C.

AU - Ichiguchi, K.

AU - Ishizawa, A.

AU - Jakubowski, M.

AU - Kamiya, K.

AU - Kasahara, H.

AU - Kawamura, G.

AU - Kato, D.

AU - Kobayashi, M.

AU - Morita, S.

AU - Mukai, K.

AU - Murakami, I.

AU - Murakami, S.

AU - Narushima, Y.

AU - Nunami, M.

AU - Ohdach, S.

AU - Ohno, N.

AU - Osakabe, M.

AU - Pablant, N.

AU - Sakakibara, S.

AU - Seki, T.

AU - Shimozuma, T.

AU - Shoji, M.

AU - Sudo, S.

AU - Tanaka, K.

AU - Tokuzawa, T.

AU - Todo, Y.

AU - Wang, H.

AU - Yamada, H.

AU - Takeiri, Y.

AU - Mutoh, T.

AU - Imagawa, S.

AU - Mito, T.

AU - Nagayama, Y.

AU - Watanabe, K. Y.

AU - Ashikawa, N.

AU - Chikaraishi, H.

AU - Ejiri, A.

AU - Furukawa, M.

AU - Fujita, T.

AU - Hamaguchi, S.

AU - Igami, H.

AU - Isobe, M.

AU - Masuzaki, S.

AU - Morisaki, T.

AU - Motojima, G.

AU - Nagasaki, K.

AU - Nakano, H.

AU - Oya, Y.

AU - Suzuki, Y.

AU - Sakamoto, R.

AU - Sakamoto, M.

AU - Sanpei, A.

AU - Takahashi, H.

AU - Tokitani, M.

AU - Ueda, Y.

AU - Yoshimura, Y.

AU - Yamamoto, S.

AU - Nishimura, K.

AU - Sugama, H.

AU - Yamamoto, T.

AU - Idei, H.

AU - Isayama, A.

AU - Kitajima, S.

AU - Masamune, S.

AU - Shinohara, K.

AU - Bawankar, P. S.

AU - Bernard, E.

AU - Von Berkel, M.

AU - Funaba, H.

AU - Huang, X. L.

AU - Ii, T.

AU - Ido, T.

AU - Ikeda, K.

AU - Kamio, S.

AU - Kumazawa, R.

AU - Moon, C.

AU - Muto, S.

AU - Miyazawa, J.

AU - Ming, T.

AU - Nakamura, Y.

AU - Nishimura, S.

AU - Ogawa, K.

AU - Ozaki, T.

AU - Oishi, T.

AU - Ohno, M.

AU - Pandya, S.

AU - Seki, R.

AU - Sano, R.

AU - Saito, K.

AU - Sakaue, H.

AU - Takemura, Y.

AU - Tsumori, K.

AU - Tamura, N.

AU - Tanaka, H.

AU - Toi, K.

AU - Wieland, B.

AU - Yamada, I.

AU - Yasuhara, R.

AU - Zhang, H.

AU - Kaneko, O.

AU - Komori, A.

PY - 2015/1/8

Y1 - 2015/1/8

N2 - The driving and damping mechanism of plasma flow is an important issue because flow shear has a significant impact on turbulence in a plasma, which determines the transport in the magnetized plasma. Here we report clear evidence of the flow damping due to stochastization of the magnetic field. Abrupt damping of the toroidal flow associated with a transition from a nested magnetic flux surface to a stochastic magnetic field is observed when the magnetic shear at the rational surface decreases to 0.5 in the large helical device. This flow damping and resulting profile flattening are much stronger than expected from the Rechester-Rosenbluth model. The toroidal flow shear shows a linear decay, while the ion temperature gradient shows an exponential decay. This observation suggests that the flow damping is due to the change in the non-diffusive term of momentum transport.

AB - The driving and damping mechanism of plasma flow is an important issue because flow shear has a significant impact on turbulence in a plasma, which determines the transport in the magnetized plasma. Here we report clear evidence of the flow damping due to stochastization of the magnetic field. Abrupt damping of the toroidal flow associated with a transition from a nested magnetic flux surface to a stochastic magnetic field is observed when the magnetic shear at the rational surface decreases to 0.5 in the large helical device. This flow damping and resulting profile flattening are much stronger than expected from the Rechester-Rosenbluth model. The toroidal flow shear shows a linear decay, while the ion temperature gradient shows an exponential decay. This observation suggests that the flow damping is due to the change in the non-diffusive term of momentum transport.

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U2 - 10.1038/ncomms6816

DO - 10.1038/ncomms6816

M3 - Article

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VL - 6

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

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