15th Topical Conference on High Temperature Plasma Diagnostics, 19 a 22 de Abril de 2004, San Diego, USA

	Global Full-Wave Simulation of the Tore Supra Doppler Reflectometer
	F. da Silva, S. Heuraux, N. Lemoine, C. Honoré, P. Hennequin, M. Manso e R. Sabot
	Resumo
	The Tore-Supra Doppler Reflectometer (TSDR) aims at measuring the poloidal wave number spectrum (k-spectrum) of the density fluctuations. To evaluate the performance and the sensitivity of the TSDR, simulations were made with a global full-wave code. The TSDR modeling with FDTD scheme and the simulations' constraints required are presented. To reach the absolute value of the poloidal k-spectrum is necessary to take into account the real size of the system: distance horn-plasma, plasma size. A particular attention is given to the role of the radiation pattern both on the TSDR spatial resolution and on the wave number detection. The spectral effect of a narrow envelop of density fluctuations is also shown as well as the effect of radial distribution of the density fluctuation k- spectrum. The effects of the large edge density fluctuations will be studied and the probing beam spreading induced by the forward scattering is also evaluated.