New Edge Coherent Mode Providing Continuous Transport in Long-Pulse H-mode Plasmas
New Edge Coherent Mode Providing Continuous Transport in Long-Pulse H-mode Plasmas
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 Superconducting Tokamak, using a newly developed dual gas-puff-imaging system and diamond-coated reciprocatin...
Saved in:
Personal Name(s): | Wang, H. Q. |
---|---|
Xu, G. S. (Corresponding author) / 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. / Rasmussen, J. Juul / Candy, J. / Bravenec, R. / Sun, Y. W. / Shi, T. H. / Liang, Yunfeng / Chen, R. / Zhang, W. / Wang, L. / Chen, L. / Zhao, N. / Li, Y. L. / Liu, Y. L. / Hu, G. H. / Gong, X. Z. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Physical review letters, 112 (2014) 18, S. 185004 |
Imprint: |
College Park, Md.
APS
2014
|
DOI: |
10.1103/PhysRevLett.112.185004 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/15124 in citations.
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 Superconducting 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. |