New Edge Coherent Mode Providing Continuous Transport in Long Pulse H-mode Plasmas

H.Q. Wang; G.S. Xu; B.N. Wan; S.Y. Ding; H.Y. Guo; L.M. Shao; S.C. Liu; X.Q. Xu; E. Wang; Ning Yan; Volker Naulin; Anders Henry Nielsen; Jens Juul Rasmussen; J. Candy; R. Bravenec; Y.W. Sun; T.H. Shi; Y.F. Liang; R. Chen; W. Zhang; L. Wang; L. Chen; N. Zhao; Y.L. Li; Y.L. Liu; G.H. Hu; X.Z. Gong

doi:10.1103/PhysRevLett.112.185004

New Edge Coherent Mode Providing Continuous Transport in Long Pulse H-mode Plasmas

H.Q. Wang, G.S. Xu, B.N. Wan, S.Y. Ding, H.Y. Guo, L.M. Shao, S.C. Liu, X.Q. Xu, E. Wang, Ning Yan, Volker Naulin, Anders Henry Nielsen, Jens Juul Rasmussen, J. Candy, R. Bravenec, Y.W. Sun, T.H. Shi, Y.F. Liang, R. Chen, W. ZhangL. Wang, L. Chen, N. Zhao, Y.L. Li, Y.L. Liu, G.H. Hu, X.Z. Gong

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Abstract

An electrostatic coherent mode near the electron diamagnetic frequency (20–90 kHz) is observed in the steep-gradient pedestal region of long pulse H-mode plasmas in the Experimental Advanced Super-conducting Tokamak, using a newly developed dual gas-puff-imaging system and diamond-coated reciprocating probes. The mode propagates in the electron diamagnetic direction in the plasma frame with poloidal wavelength of ∼8 cm. The mode drives a significant outflow of particles and heat as measured directly with the probes, thus greatly facilitating long pulse H-mode sustainment. This mode shows the nature of dissipative trapped electron mode, as evidenced by gyrokinetic turbulence simulations.

Original language	English
Article number	185004
Journal	Physical Review Letters
Volume	112
Issue number	18
Number of pages	5
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.112.185004
Publication status	Published - 2014

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Wang, H. Q., Xu, G. S., Wan, B. N., Ding, S. Y., Guo, H. Y., Shao, L. M., Liu, S. C., Xu, X. Q., Wang, E., Yan, N., Naulin, V., Nielsen, A. H., Juul Rasmussen, J., Candy, J., Bravenec, R., Sun, Y. W., Shi, T. H., Liang, Y. F., Chen, R., ... Gong, X. Z. (2014). New Edge Coherent Mode Providing Continuous Transport in Long Pulse H-mode Plasmas. Physical Review Letters, 112(18), Article 185004. https://doi.org/10.1103/PhysRevLett.112.185004

@article{579d387ff9874522bea2bc37d5089d4b,

title = "New Edge Coherent Mode Providing Continuous Transport in Long Pulse H-mode Plasmas",

abstract = "An electrostatic coherent mode near the electron diamagnetic frequency (20–90 kHz) is observed in the steep-gradient pedestal region of long pulse H-mode plasmas in the Experimental Advanced Super-conducting Tokamak, using a newly developed dual gas-puff-imaging system and diamond-coated reciprocating probes. The mode propagates in the electron diamagnetic direction in the plasma frame with poloidal wavelength of ∼8 cm. The mode drives a significant outflow of particles and heat as measured directly with the probes, thus greatly facilitating long pulse H-mode sustainment. This mode shows the nature of dissipative trapped electron mode, as evidenced by gyrokinetic turbulence simulations.",

author = "H.Q. Wang and G.S. Xu and B.N. Wan and S.Y. Ding and H.Y. Guo and L.M. Shao and S.C. Liu and X.Q. Xu and E. Wang and Ning Yan and Volker Naulin and Nielsen, {Anders Henry} and {Juul Rasmussen}, Jens and J. Candy and R. Bravenec and Y.W. Sun and T.H. Shi and Y.F. Liang and R. Chen and W. Zhang and L. Wang and L. Chen and N. Zhao and Y.L. Li and Y.L. Liu and G.H. Hu and X.Z. Gong",

note = "{\textcopyright} 2014 American Physical Society",

year = "2014",

doi = "10.1103/PhysRevLett.112.185004",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "18",

}

Wang, HQ, Xu, GS, Wan, BN, Ding, SY, Guo, HY, Shao, LM, Liu, SC, Xu, XQ, Wang, E, Yan, N, Naulin, V , Nielsen, AH , Juul Rasmussen, J, Candy, J, Bravenec, R, Sun, YW, Shi, TH, Liang, YF, Chen, R, Zhang, W, Wang, L, Chen, L, Zhao, N, Li, YL, Liu, YL, Hu, GH & Gong, XZ 2014, 'New Edge Coherent Mode Providing Continuous Transport in Long Pulse H-mode Plasmas', Physical Review Letters, vol. 112, no. 18, 185004. https://doi.org/10.1103/PhysRevLett.112.185004

TY - JOUR

T1 - New Edge Coherent Mode Providing Continuous Transport in Long Pulse H-mode Plasmas

AU - Wang, H.Q.

AU - Xu, G.S.

AU - Wan, B.N.

AU - Ding, S.Y.

AU - Guo, H.Y.

AU - Shao, L.M.

AU - Liu, S.C.

AU - Xu, X.Q.

AU - Wang, E.

AU - Yan, Ning

AU - Naulin, Volker

AU - Nielsen, Anders Henry

AU - Juul Rasmussen, Jens

AU - Candy, J.

AU - Bravenec, R.

AU - Sun, Y.W.

AU - Shi, T.H.

AU - Liang, Y.F.

AU - Chen, R.

AU - Zhang, W.

AU - Wang, L.

AU - Chen, L.

AU - Zhao, N.

AU - Li, Y.L.

AU - Liu, Y.L.

AU - Hu, G.H.

AU - Gong, X.Z.

PY - 2014

Y1 - 2014

N2 - An electrostatic coherent mode near the electron diamagnetic frequency (20–90 kHz) is observed in the steep-gradient pedestal region of long pulse H-mode plasmas in the Experimental Advanced Super-conducting Tokamak, using a newly developed dual gas-puff-imaging system and diamond-coated reciprocating probes. The mode propagates in the electron diamagnetic direction in the plasma frame with poloidal wavelength of ∼8 cm. The mode drives a significant outflow of particles and heat as measured directly with the probes, thus greatly facilitating long pulse H-mode sustainment. This mode shows the nature of dissipative trapped electron mode, as evidenced by gyrokinetic turbulence simulations.

AB - An electrostatic coherent mode near the electron diamagnetic frequency (20–90 kHz) is observed in the steep-gradient pedestal region of long pulse H-mode plasmas in the Experimental Advanced Super-conducting Tokamak, using a newly developed dual gas-puff-imaging system and diamond-coated reciprocating probes. The mode propagates in the electron diamagnetic direction in the plasma frame with poloidal wavelength of ∼8 cm. The mode drives a significant outflow of particles and heat as measured directly with the probes, thus greatly facilitating long pulse H-mode sustainment. This mode shows the nature of dissipative trapped electron mode, as evidenced by gyrokinetic turbulence simulations.

U2 - 10.1103/PhysRevLett.112.185004

DO - 10.1103/PhysRevLett.112.185004

M3 - Journal article

C2 - 24856704

SN - 0031-9007

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

M1 - 185004

ER -

New Edge Coherent Mode Providing Continuous Transport in Long Pulse H-mode Plasmas

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