The effect of transient density profile shaping on transport in large stellarators and heliotrons

A. Dinklage; R. Sakamoto; M. Yokoyama; K. Ida; J. Baldzuhn; C. D. Beidler; S. Cats; K.J. Mc Carthy; J. Geiger; M. Kobayashi; H. Maaßberg; S. Morita; G. Motojima; M. Nakata; M. Nunami; N. Pablant; K. Ogawa; J.H.E. Proll; S. Satake; K. Tanaka; F. Warmer; R.C. Wolf; P. Xanthopoulos; H. Yamada; R. Yasuhara; M. Yoshinuma

doi:10.1088/1741-4326/aa6775

The effect of transient density profile shaping on transport in large stellarators and heliotrons

A. Dinklage, R. Sakamoto, M. Yokoyama, K. Ida, J. Baldzuhn, C. D. Beidler, S. Cats, K.J. Mc Carthy, J. Geiger, M. Kobayashi, H. Maaßberg, S. Morita, G. Motojima, M. Nakata, M. Nunami, N. Pablant, K. Ogawa, J.H.E. Proll, S. Satake, K. TanakaF. Warmer, R.C. Wolf, P. Xanthopoulos, H. Yamada, R. Yasuhara, M. Yoshinuma

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

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Abstract

Transport studies of pellet fuelling experiments on LHD are reported. Spatio-temporal evolutions after pellet injection into LHD discharges show cases where central density increases on the time scale of particle transport processes. Both the temperature gradient and the density gradient change during the density relaxation, the latter even in sign. The resulting thermodynamic forces influence radial electric fields - both as a driving term but also by, e.g. affecting the E _r dependence of ion transport. Magnetic fluctuations have been found to be induced by pellet injection but die out with the relaxation of the pressure profile.

Original language	English
Article number	066016
Number of pages	6
Journal	Nuclear Fusion
Volume	57
Issue number	6
DOIs	https://doi.org/10.1088/1741-4326/aa6775
Publication status	Published - Jun 2017

Keywords

density control
fueling
heliotrons
stellarators

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Dinklage, A., Sakamoto, R., Yokoyama, M., Ida, K., Baldzuhn, J., Beidler, C. D., Cats, S., Mc Carthy, K. J., Geiger, J., Kobayashi, M., Maaßberg, H., Morita, S., Motojima, G., Nakata, M., Nunami, M., Pablant, N., Ogawa, K., Proll, J. H. E., Satake, S., ... Yoshinuma, M. (2017). The effect of transient density profile shaping on transport in large stellarators and heliotrons. Nuclear Fusion, 57(6), Article 066016. https://doi.org/10.1088/1741-4326/aa6775

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title = "The effect of transient density profile shaping on transport in large stellarators and heliotrons",

abstract = "Transport studies of pellet fuelling experiments on LHD are reported. Spatio-temporal evolutions after pellet injection into LHD discharges show cases where central density increases on the time scale of particle transport processes. Both the temperature gradient and the density gradient change during the density relaxation, the latter even in sign. The resulting thermodynamic forces influence radial electric fields - both as a driving term but also by, e.g. affecting the E r dependence of ion transport. Magnetic fluctuations have been found to be induced by pellet injection but die out with the relaxation of the pressure profile.",

keywords = "density control, fueling, heliotrons, stellarators",

author = "A. Dinklage and R. Sakamoto and M. Yokoyama and K. Ida and J. Baldzuhn and Beidler, {C. D.} and S. Cats and {Mc Carthy}, K.J. and J. Geiger and M. Kobayashi and H. Maa{\ss}berg and S. Morita and G. Motojima and M. Nakata and M. Nunami and N. Pablant and K. Ogawa and J.H.E. Proll and S. Satake and K. Tanaka and F. Warmer and R.C. Wolf and P. Xanthopoulos and H. Yamada and R. Yasuhara and M. Yoshinuma",

year = "2017",

month = jun,

doi = "10.1088/1741-4326/aa6775",

language = "English",

volume = "57",

journal = "Nuclear Fusion",

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Dinklage, A, Sakamoto, R, Yokoyama, M, Ida, K, Baldzuhn, J, Beidler, CD, Cats, S, Mc Carthy, KJ, Geiger, J, Kobayashi, M, Maaßberg, H, Morita, S, Motojima, G, Nakata, M, Nunami, M, Pablant, N, Ogawa, K, Proll, JHE, Satake, S, Tanaka, K, Warmer, F, Wolf, RC, Xanthopoulos, P, Yamada, H, Yasuhara, R & Yoshinuma, M 2017, 'The effect of transient density profile shaping on transport in large stellarators and heliotrons', Nuclear Fusion, vol. 57, no. 6, 066016. https://doi.org/10.1088/1741-4326/aa6775

TY - JOUR

T1 - The effect of transient density profile shaping on transport in large stellarators and heliotrons

AU - Dinklage, A.

AU - Sakamoto, R.

AU - Yokoyama, M.

AU - Ida, K.

AU - Baldzuhn, J.

AU - Beidler, C. D.

AU - Cats, S.

AU - Mc Carthy, K.J.

AU - Geiger, J.

AU - Kobayashi, M.

AU - Maaßberg, H.

AU - Morita, S.

AU - Motojima, G.

AU - Nakata, M.

AU - Nunami, M.

AU - Pablant, N.

AU - Ogawa, K.

AU - Proll, J.H.E.

AU - Satake, S.

AU - Tanaka, K.

AU - Warmer, F.

AU - Wolf, R.C.

AU - Xanthopoulos, P.

AU - Yamada, H.

AU - Yasuhara, R.

AU - Yoshinuma, M.

PY - 2017/6

Y1 - 2017/6

N2 - Transport studies of pellet fuelling experiments on LHD are reported. Spatio-temporal evolutions after pellet injection into LHD discharges show cases where central density increases on the time scale of particle transport processes. Both the temperature gradient and the density gradient change during the density relaxation, the latter even in sign. The resulting thermodynamic forces influence radial electric fields - both as a driving term but also by, e.g. affecting the E r dependence of ion transport. Magnetic fluctuations have been found to be induced by pellet injection but die out with the relaxation of the pressure profile.

AB - Transport studies of pellet fuelling experiments on LHD are reported. Spatio-temporal evolutions after pellet injection into LHD discharges show cases where central density increases on the time scale of particle transport processes. Both the temperature gradient and the density gradient change during the density relaxation, the latter even in sign. The resulting thermodynamic forces influence radial electric fields - both as a driving term but also by, e.g. affecting the E r dependence of ion transport. Magnetic fluctuations have been found to be induced by pellet injection but die out with the relaxation of the pressure profile.

KW - density control

KW - fueling

KW - heliotrons

KW - stellarators

UR - http://www.scopus.com/inward/record.url?scp=85019493248&partnerID=8YFLogxK

U2 - 10.1088/1741-4326/aa6775

DO - 10.1088/1741-4326/aa6775

M3 - Article

AN - SCOPUS:85019493248

SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 6

M1 - 066016

ER -

The effect of transient density profile shaping on transport in large stellarators and heliotrons

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