Speaker
Description
Interferometric and polarimetric diagnostics [1] are widely used in plasma experiments, particularly in magnetically confined fusion devices, to determine the electron density and to provide key information on internal magnetic fields, respectively. These measurements play a
crucial role in the reconstruction of the plasma magnetic equilibrium and in the real-time estimation of the safety factor (q) profile, enabling plasma configuration control.
Interferometry and polarimetry are often combined [2] into integrated diagnostic systems to allow simultaneous measurements of electron density and magnetic field.
For the Divertor Tokamak Test facility (DTT) [3], a new tokamak currently under construction in Frascati, Italy, three systems are foreseen: a tangential dispersion interferometer, a poloidal interferometer/polarimeter, and a divertor interferometer. This work focuses mainly on two of these systems: the tangential dispersion interferometer and the poloidal interferometer/polarimeter. For both systems, the work carried out to date will be briefly
presented, and the latest advances in their design and modelling will be described.
References
[1] I. H. Hutchinson, Principle of plasma diagnostics, Cambridge University Press, 2002.
[2] S. E. Segre, A review of plasma polarimetry - theory and methods, Plasma Phys. Control.
Fusion 41 R57, 1999.
[3] R. Martone, R. Albanese, F. Crisanti, P. Martin, and A. Pizzuto, DTT-Divertor Tokamak
Test Facility, Interim Design Report (ENEA, 2019),
https://www.dttproject.enea.it/downloads/DTT_IDR_2019_WEB.pdf