ECE-imaging of the H-mode pedestal (invited)
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
- University of Texas-Austin, Austin, Texas 78712 (United States)
- Dutch Institute for Fundamental Energy Research, 3430 BE Nieuwegein (Netherlands)
- General Atomics, P.O.Box 85608, San Diego, California 92186 (United States)
- University of California-Davis, Davis, California 95616 (United States)
A synthetic diagnostic has been developed that reproduces the highly structured electron cyclotron emission (ECE) spectrum radiated from the edge region of H-mode discharges. The modeled dependence on local perturbations of the equilibrium plasma pressure allows for interpretation of ECE data for diagnosis of local quantities. Forward modeling of the diagnostic response in this region allows for improved mapping of the observed fluctuations to flux surfaces within the plasma, allowing for the poloidal mode number of coherent structures to be resolved. In addition, other spectral features that are dependent on both T{sub e} and n{sub e} contain information about pedestal structure and the electron energy distribution of localized phenomena, such as edge filaments arising during edge-localized mode (ELM) activity.
- OSTI ID:
- 22093932
- Journal Information:
- Review of Scientific Instruments, Vol. 83, Issue 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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