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Isotope effects on transport in LHD. / Tanaka, K.; Nagaoka, K.; Ida, K. et al.

In: Plasma Physics and Controlled Fusion, Vol. 63, No. 9, 094001, 09.2021.

Research output: Contribution to journal › Article › peer-review

Harvard

Tanaka, K, Nagaoka, K, Ida, K, Yamada, H, Kobayashi, T, Satake, S, Nakata, M, Kinoshita, T, Ohtani, Y, Tokuzawa, T, Takahashi, H, Warmer, F, Mukai, K, Murakami, S, Sakamoto, R, Nakano, H, Osakabe, M, Morisaki, T, Nunami, M, Tala, T, Tsujimura, T, Takemura, Y, Yokoyama, M, Seki, R, Igami, H, Yoshimura, Y, Kubo, S, Shimozuma, T, Akiyama, T, Yamada, I, Yasuhara, R, Funaba, H, Yoshinuma, M, Goto, M, Oishi, T, Morita, S, Motojima, G, Shoji, M, Masuzaki, S, Michael, CA & Vacheslavov, LN 2021, 'Isotope effects on transport in LHD', Plasma Physics and Controlled Fusion, vol. 63, no. 9, 094001. https://doi.org/10.1088/1361-6587/abffb6

APA

Tanaka, K., Nagaoka, K., Ida, K., Yamada, H., Kobayashi, T., Satake, S., Nakata, M., Kinoshita, T., Ohtani, Y., Tokuzawa, T., Takahashi, H., Warmer, F., Mukai, K., Murakami, S., Sakamoto, R., Nakano, H., Osakabe, M., Morisaki, T., Nunami, M., ... Vacheslavov, L. N. (2021). Isotope effects on transport in LHD. Plasma Physics and Controlled Fusion, 63(9), [094001]. https://doi.org/10.1088/1361-6587/abffb6

Vancouver

Tanaka K, Nagaoka K, Ida K, Yamada H, Kobayashi T, Satake S et al. Isotope effects on transport in LHD. Plasma Physics and Controlled Fusion. 2021 Sept;63(9):094001. doi: 10.1088/1361-6587/abffb6

Author

Tanaka, K. ; Nagaoka, K. ; Ida, K. et al. / Isotope effects on transport in LHD. In: Plasma Physics and Controlled Fusion. 2021 ; Vol. 63, No. 9.

BibTeX

@article{e36598657e4d46d4a0d36f29ac83eb3b,
title = "Isotope effects on transport in LHD",
abstract = "Isotope effects are one of the most important issues for predicting future reactor operations. Large helical device (LHD) is the presently working largest stellarator/helical device using super conducting helical coils. In LHD, deuterium experiments started in 2017. Extensive studies regarding isotope effects on transport have been carried out. In this paper, the results of isotope effect studies in LHD are reported. The systematic studies were performed adjusting operational parameters and nondimensional parameters. In L mode like normal confinement plasma, where internal and edge transport barriers are not formed, the scaling of global energy confinement time (τE) with operational parameters shows positive mass dependence (M0.27; where M is effective ion mass) in electron cyclotron heating plasma and no mass dependence (M0.0) in neutral beam injection heating plasma. The non-negative ion mass dependence is anti-gyro-Bohm scaling. The role of the turbulence in isotope effects was also found by turbulence measurements and gyrokinetic simulation. Better accessibility to electron and ion internal transport barrier (ITB) plasma is found in deuterium (D) plasma than in hydrogen (H). Gyro kinetic non-linear simulation shows reduced ion heat flux due to the larger generation of zonal flow in deuterium plasma. Peaked carbon density profile plays a prominent role in reducing ion energy transport in ITB plasma. This is evident only in plasma with deuterium ions. New findings on the mixing and non-mixing states of D and H particle transports are reported. In the mixing state, ion particle diffusivities are higher than electron particle diffusivities and D and H ion density profiles are almost identical. In the non-mixing state, ion particle diffusivity is much lower than electron diffusivity. Deuterium and hydrogen ion profiles are clearly different. Different turbulence structures were found in the mixing and non-mixing states suggesting different turbulence modes play a role.",
author = "K. Tanaka and K. Nagaoka and K. Ida and H. Yamada and T. Kobayashi and S. Satake and M. Nakata and T. Kinoshita and Y. Ohtani and T. Tokuzawa and H. Takahashi and F. Warmer and K. Mukai and S. Murakami and R. Sakamoto and H. Nakano and M. Osakabe and T. Morisaki and M. Nunami and T. Tala and T. Tsujimura and Y. Takemura and M. Yokoyama and R. Seki and H. Igami and Y. Yoshimura and S. Kubo and T. Shimozuma and T. Akiyama and I. Yamada and R. Yasuhara and H. Funaba and M. Yoshinuma and M. Goto and T. Oishi and S. Morita and G. Motojima and M. Shoji and S. Masuzaki and Michael, {C. A.} and Vacheslavov, {L. N.}",
note = "Funding Information: This work is supported by NIFS Grants NIFS17ULHH013, NIFS18ULHH013, NIFS18KLER045, NIFS18KLPH032, NIFS18KUHL083, NIFS19KLPH038, NIFS17ULRR701, NIFS17ULRR702, NIFS17ULRR801, NIFS17ULRR808, NIFS17ULRR809, NIFS17KLPR036, NIFS16UMLG701, NIFS16ULGG801, NIFS19KLPH038, NIFS17UNTT008, NIFS17KLPR036, NIFS16KNST096, NIFS18KNXN369, NIFS16KNXN315, NIFS18KNST132, NIFS17KLPH031, NIFS17ULHH033, JSPS Grant 16H04620, JSPS Grant 17K14898, JSPS Grant 17K14899, JSPS Grant 15H02336, JSPS Grant 16H02442, JSPS Grant 17H01368, and US DOE under DE-SC0019007 Numerical simulations were performed by Plasma Simulator at NIFS, and by FX100 at Nagoya University, and supported by the NIFS collaborative Research Programs, and partly by the MEXT grant for Post K project: Development of Innovative Clean Energy, Core Design of Fusion Reactor. Publisher Copyright: {\textcopyright} 2021 The Author(s). Published by IOP Publishing Ltd.",
year = "2021",
month = sep,
doi = "10.1088/1361-6587/abffb6",
language = "English",
volume = "63",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
publisher = "IOP Publishing Ltd.",
number = "9",

}

RIS

TY - JOUR

T1 - Isotope effects on transport in LHD

AU - Tanaka, K.

AU - Nagaoka, K.

AU - Ida, K.

AU - Yamada, H.

AU - Kobayashi, T.

AU - Satake, S.

AU - Nakata, M.

AU - Kinoshita, T.

AU - Ohtani, Y.

AU - Tokuzawa, T.

AU - Takahashi, H.

AU - Warmer, F.

AU - Mukai, K.

AU - Murakami, S.

AU - Sakamoto, R.

AU - Nakano, H.

AU - Osakabe, M.

AU - Morisaki, T.

AU - Nunami, M.

AU - Tala, T.

AU - Tsujimura, T.

AU - Takemura, Y.

AU - Yokoyama, M.

AU - Seki, R.

AU - Igami, H.

AU - Yoshimura, Y.

AU - Kubo, S.

AU - Shimozuma, T.

AU - Akiyama, T.

AU - Yamada, I.

AU - Yasuhara, R.

AU - Funaba, H.

AU - Yoshinuma, M.

AU - Goto, M.

AU - Oishi, T.

AU - Morita, S.

AU - Motojima, G.

AU - Shoji, M.

AU - Masuzaki, S.

AU - Michael, C. A.

AU - Vacheslavov, L. N.

N1 - Funding Information: This work is supported by NIFS Grants NIFS17ULHH013, NIFS18ULHH013, NIFS18KLER045, NIFS18KLPH032, NIFS18KUHL083, NIFS19KLPH038, NIFS17ULRR701, NIFS17ULRR702, NIFS17ULRR801, NIFS17ULRR808, NIFS17ULRR809, NIFS17KLPR036, NIFS16UMLG701, NIFS16ULGG801, NIFS19KLPH038, NIFS17UNTT008, NIFS17KLPR036, NIFS16KNST096, NIFS18KNXN369, NIFS16KNXN315, NIFS18KNST132, NIFS17KLPH031, NIFS17ULHH033, JSPS Grant 16H04620, JSPS Grant 17K14898, JSPS Grant 17K14899, JSPS Grant 15H02336, JSPS Grant 16H02442, JSPS Grant 17H01368, and US DOE under DE-SC0019007 Numerical simulations were performed by Plasma Simulator at NIFS, and by FX100 at Nagoya University, and supported by the NIFS collaborative Research Programs, and partly by the MEXT grant for Post K project: Development of Innovative Clean Energy, Core Design of Fusion Reactor. Publisher Copyright: © 2021 The Author(s). Published by IOP Publishing Ltd.

PY - 2021/9

Y1 - 2021/9

N2 - Isotope effects are one of the most important issues for predicting future reactor operations. Large helical device (LHD) is the presently working largest stellarator/helical device using super conducting helical coils. In LHD, deuterium experiments started in 2017. Extensive studies regarding isotope effects on transport have been carried out. In this paper, the results of isotope effect studies in LHD are reported. The systematic studies were performed adjusting operational parameters and nondimensional parameters. In L mode like normal confinement plasma, where internal and edge transport barriers are not formed, the scaling of global energy confinement time (τE) with operational parameters shows positive mass dependence (M0.27; where M is effective ion mass) in electron cyclotron heating plasma and no mass dependence (M0.0) in neutral beam injection heating plasma. The non-negative ion mass dependence is anti-gyro-Bohm scaling. The role of the turbulence in isotope effects was also found by turbulence measurements and gyrokinetic simulation. Better accessibility to electron and ion internal transport barrier (ITB) plasma is found in deuterium (D) plasma than in hydrogen (H). Gyro kinetic non-linear simulation shows reduced ion heat flux due to the larger generation of zonal flow in deuterium plasma. Peaked carbon density profile plays a prominent role in reducing ion energy transport in ITB plasma. This is evident only in plasma with deuterium ions. New findings on the mixing and non-mixing states of D and H particle transports are reported. In the mixing state, ion particle diffusivities are higher than electron particle diffusivities and D and H ion density profiles are almost identical. In the non-mixing state, ion particle diffusivity is much lower than electron diffusivity. Deuterium and hydrogen ion profiles are clearly different. Different turbulence structures were found in the mixing and non-mixing states suggesting different turbulence modes play a role.

AB - Isotope effects are one of the most important issues for predicting future reactor operations. Large helical device (LHD) is the presently working largest stellarator/helical device using super conducting helical coils. In LHD, deuterium experiments started in 2017. Extensive studies regarding isotope effects on transport have been carried out. In this paper, the results of isotope effect studies in LHD are reported. The systematic studies were performed adjusting operational parameters and nondimensional parameters. In L mode like normal confinement plasma, where internal and edge transport barriers are not formed, the scaling of global energy confinement time (τE) with operational parameters shows positive mass dependence (M0.27; where M is effective ion mass) in electron cyclotron heating plasma and no mass dependence (M0.0) in neutral beam injection heating plasma. The non-negative ion mass dependence is anti-gyro-Bohm scaling. The role of the turbulence in isotope effects was also found by turbulence measurements and gyrokinetic simulation. Better accessibility to electron and ion internal transport barrier (ITB) plasma is found in deuterium (D) plasma than in hydrogen (H). Gyro kinetic non-linear simulation shows reduced ion heat flux due to the larger generation of zonal flow in deuterium plasma. Peaked carbon density profile plays a prominent role in reducing ion energy transport in ITB plasma. This is evident only in plasma with deuterium ions. New findings on the mixing and non-mixing states of D and H particle transports are reported. In the mixing state, ion particle diffusivities are higher than electron particle diffusivities and D and H ion density profiles are almost identical. In the non-mixing state, ion particle diffusivity is much lower than electron diffusivity. Deuterium and hydrogen ion profiles are clearly different. Different turbulence structures were found in the mixing and non-mixing states suggesting different turbulence modes play a role.

UR - http://www.scopus.com/inward/record.url?scp=85112593915&partnerID=8YFLogxK

U2 - 10.1088/1361-6587/abffb6

DO - 10.1088/1361-6587/abffb6

M3 - Article

AN - SCOPUS:85112593915

VL - 63

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 9

M1 - 094001

ER -

ID: 33979820