Visible spectro-tomography : from low temperature laboratory plasmas to the WEST tokamak

With the former Tore Supra tokamak being modified in the frame of the WEST project, the X-ray imaging crystal spectroscopy and the helium beam emission spectroscopy (He BES) diagnostics are being significantly upgraded. These two diagnostics, mandatory to address the physics of transport, are designed for spatially and temporally resolved kinetic profile measurements from the core to the edge of plasma. In parallel, a visible spectroscopy-tomography setup is being prototyped to extend the 1D radial He BES measurement of the electron temperature (Te) and density (Ne) to a 2D map of the scrape-off layer. The diagnostic is currently being developed on the stable low temperature low pressure magnetized plasma column of the Mistral set up at the PIIM laboratory [1].