RFX-mod2 Facility Upgrades And Diagnostic Capability Enhancements For The Exploration Of Multi-Magnetic-Configurations

The RFX-mod2 device, the upgraded version of the previous RFX-mod with a modified magnetic boundary, is presently under realization and will start to be operated in 2024. Significant upgrades of the diagnostic capabilities have been proposed and are under development. These include a largely increased number of in-vessel magnetic and electrostatic sensors, a new fast reciprocating manipulator for the exploration of the edge plasma in a wide range of experimental conditions, the improved Thomson scattering and soft X-ray diagnostics system for a detailed determination of the behavior of the electron temperature profile, new dedicated systems for the space and time resolved determination of x-ray spectra and neutron rate, a diagnostics made on reflectometric analysis for real-time determination of plasma position, two diagnostics devoted to the imaging of light impurities and influxes behavior along with arrays of Halo current sensors. These diagnostic upgrades will be accompanied by a significant effort on the control the electron density by means of proper treatment of plasma facing components with in-vessel fixed electrodes distributed along the machine. The described advancements will allow a deeper understanding of physics phenomena in the wide variety of magnetic configurations, including the Tokamak, the Reversed-Field Pinch and the Ultra-low q, which can be produced in RFX-mod2 thanks to its flexibility and unique MHD control capabilities.