| Autor: |
L. Wang, M.A. Makowski, H.Y. Guo, A.W. Leonard, G.S. Xu, X.Z. Gong, A.M. Garofalo, G.Z. Deng, T.W. Petrie, D. Thomas, G. Jackson, G. Kramer, R. Maingi, J.B. Liu, W. Feng, H. Wang, B. Zhang, S. Ding, C.K. Pan, Y.J. Hu, J.P. Qian, J. Li, B.N. Wan |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Nuclear Materials and Energy, Vol 12, Iss , Pp 221-226 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2352-1791 |
| DOI: |
10.1016/j.nme.2017.01.024 |
| Popis: |
Joint DIII-D/EAST experiments in the radio-frequency (RF) heated H-mode scheme with comparison to that of neutral beam (NB) heated H-mode scheme were carried out on DIII-D and EAST under similar conditions to examine the effect of heating scheme on scrape-off layer (SOL) width in H-mode plasmas for application to ITER. A dimensionally similar plasma equilibrium was used to match the EAST shape parameters. The divertor heat flux and SOL widths were measured with infra-red camera in DIII-D, while with divertor Langmuir probe array in EAST. It has been demonstrated on both DIII-D and EAST that RF-heated plasma has a broader SOL than NB-heated plasma when the edge electrons are effectively heated in low plasma current and low density regime with low edge collisionality. Detailed edge and pedestal profile analysis on DIII-D suggests that the low edge collisionality and ion orbit loss effect may account for the observed broadening. The joint experiment in DIII-D has also demonstrated the strong inverse dependence of SOL width on the plasma current in electron cyclotron heated (ECH) H-mode plasmas. Keywords: SOL width, Radio-frequency heating, Neutral beam heating, Low collisionality |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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