ICRH modelling of DTT in full power and reduced-field plasma scenarios by full wave codes

An in-depth analysis of ion cyclotron resonance heating (ICRH) absorption in the Divertor Tokamak Test (DTT) plasma has been performed over the years following the evolution of the machine parameters, such as magnetic field, major and minor radii, among others, and in agreement with the prescription of the transport codes regarding expected kinetic profiles. The application of the ICRH in DTT even with plasma parameters at reduced toroidal magnetic field has recently reopened the analysis and the modelling of the ICRH in this context. This use aims to evaluate whether the antenna setup (frequency range, coupled spectra, etc.) is compatible with the scenario planned for the first years of DTT operations. To this end, the numerical code TORIC, accompanied by the quasi-linear analysis, has been extensively used for parametric analysis: minority or majority heating (first harmonic of deuterium in the hydrogen minority scenario), magnetic field, frequency, spectra (parallel wave number, power, etc.) in both full heating and full performance machine scenarios. These analyses were also conducted in the reduced-field plasma scenario (B = 3 T, Ip = 2 MA). The results of this extensive parametric investigation are summarised in this paper, and prescriptions are also provided for the correct use of ICRH to maximise ion heating in all device performances.