Abstract
Characteristics of the divertor radiation loss are investigated with the spatially resolved bolometer arrays. In discharges with the ion grad- B drift toward the divertor, a radiative region is formed between the outer separatrix strike zone and the X-point. The radiative state is accompanied by a gradual decrease in heat flux to the divertor plates, and lasts for a few seconds with large particle fluxes to the separatrix strike zones, finally leading to a MARFE at the X-point. This radiation loss fraction of the input power depends on the electron density, NB heating power and safety factor, and can reach the level of radiation loss found in the MARFE. In the discharges with the ion grad- B drift away from the divertor, the MARFE has never been generated at the X-point. However, there is no significant difference in the maximum radiation loss level. The radiation loss is nearly in-out symmetric when the radiation loss is large for both types of discharges.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.