Study of ITER plasma position reflectometer using a two-dimensional full-wave finite-difference time domain code
- Associacao EURATOM/IST-Instituto de Plasmas e Fusao Nuclear Instituto Superior Tecnico, 1046-001 Lisboa (Portugal)
- Laboratoire de Physique des Milieux Ionises et Applications, Universite Henri Poincare, Unite du CNRS 7040, Nancy 1, BP 239, 54506 Vandoeuvre, Cedex (France)
The EU will supply the plasma position reflectometer for ITER. The system will have channels located at different poloidal positions, some of them obliquely viewing a plasma which has a poloidal density divergence and curvature, both adverse conditions for profile measurements. To understand the impact of such topology in the reconstruction of density profiles a full-wave two-dimensional finite-difference time domain O-mode code with the capability for frequency sweep was used. Simulations show that the reconstructed density profiles still meet the ITER radial accuracy specifications for plasma position (1 cm), except for the highest densities. Other adverse effects such as multireflections induced by the blanket, density fluctuations, and MHD activity were considered and a first understanding on their impact obtained.
- OSTI ID:
- 21266596
- Journal Information:
- Review of Scientific Instruments, Vol. 79, Issue 10; Conference: HTPD08: 17. topical conference on high-temperature plasma diagnostics, Albuquerque, NM (United States), 11-15 May 2008; Other Information: DOI: 10.1063/1.2955568; (c) 2008 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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