Development of novel fuel ion ratio diagnostic techniques

To overcome the challenge of measuring the fuel ion ratio in the core (ρ <0.3) of ITER, a coordinated effort aiming at developing diagnostic techniques has been initiated. The investigated techniques are novel uses or further development of existing methods such as charge exchange recombination spectrometry, neutron spectrometry, and collective Thomson scattering. An overview of the work on the three diagnostic techniques is presented. © 2010 EURATOM.