Description
The Divertor Tokamak Test (DTT) facility, currently under construction at the ENEA Frascati Research Center (Italy), is designed to investigate power exhaust solutions at high divertor power densities [1]. Achieving the scientific and operational objectives of DTT requires a comprehensive and reliable diagnostic system. Among these, the bolometric tomography, providing measurements of the plasma radiated power, is crucial for both machine protection and physics studies [2].
Recent developments have led to significant improvements in the design of the bolometric system [3], including enhanced cooling solutions [4] to cope with the expected high heat loads, and the validation of the diagnostic layout through tomographic reconstructions based on a maximum likelihood method [5]. This approach enables the accurate reconstruction of complex emissivity profiles while minimising reconstruction artefacts.
To further assess the diagnostic performance, synthetic emissivity profiles (phantoms) have been generated from the radial power density profiles obtained from ASTRA and JINTRAC [6] simulations of the expected DTT single null plasma scenario during the flattop phase.
The aforementioned radiation profiles describe plasma regions that radiate uniformly along the same magnetic surface. In addition, poloidally asymmetric radiative patterns will be considered, which are meant to simulate the two-dimensional emissivity distributions experimentally observed in other tokamak devices.