Estimation of Electron Bernstein Emission in the TJ-II Stellarator

In order to study experimentally the viability of first harmonic EBW heating in the TJ-II stellarator by means of the O-X-B tecnique [1], an EBE diagnostic was recently installed [2]. In the present work a theoretical estimation of the EBW radiation in the TJ-II plasmas have been carried out making use of the ray tracing code TRUBA [3]. The line of sight of the EBE diagnostic may be modified using an internal movable mirror and therefore, for comparison with the experimental results, the theoretical O-X-B emission window has been determined. Experimental density and temperature profiles obtained in NBI discharges are considered in the simulations.\\ \textbf{References:}\\ $\left[1\right]$ F. Castejon {\it et al}, \textit{Nucl. Fusion} {\bf 48}, 075011 (2008).\\ $\left[2\right]$ J. Caughman {\it et al}, \textit{Proc. 15th Joint Workshop on ECE and ECRH}, Yosemite, USA (2008).\\ $\left[3\right]$ M. A. Tereshchenko {\it et. al}, {\it Proc. 30th EPS Conference on Contr. Fusion and Plasma Phys.}, {\bf 27A}, P-1.18 (2003).