Effect of heating scheme on SOL width in DIII-D and EAST
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. Finally, 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.
- Research Organization:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China; Lawrence Livermore National Laboratory, Livermore, California 94551, USA; General Atomics, San Diego, CA92186-5608, USA; Princeton Plasma Physics Laboratory, Princeton, NJ 08543, USA
- Grant/Contract Number:
- AC52-07NA27344; FC02-04ER54698; FG02-95ER54309; 2013GB107003; 2015GB101000; 11575236; 11422546; 11261140328
- OSTI ID:
- 1346428
- Alternate ID(s):
- OSTI ID: 1349259
- Journal Information:
- Nuclear Materials and Energy, Journal Name: Nuclear Materials and Energy Vol. 12 Journal Issue: C; ISSN 2352-1791
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Web of Science
Study of power width scaling in scrape-off layer with 2D electrostatic turbulence code based on EAST L-mode discharges
|
journal | April 2019 |
Experimental study of heating scheme effect on the inner divertor power footprint widths in EAST lower single null discharges
|
journal | February 2018 |
Statistical study of particle flux footprint widths with tungsten divertor in EAST
|
journal | February 2019 |
Divertor detachment and asymmetry in H-mode operation with an ITER-like tungsten divertor in EAST
|
journal | October 2019 |
Similar Records
OVERVIEW OF RECENT EXPERIMENTAL RESULTS FROM THE DIII-D ADVANCED TOKAMAK PROGRAM
Overview of recent experimental results from the DIII-D advanced tokamak program.