Shattered Pellet Injection (SPI) experiments were performed at ASDEX Upgrade (AUG) [1] to determine the injection properties for effective disruption mitigation as part of the ITER SPI design optimisation effort [2]. It has been found that the overall disruption dynamics, like pre-thermal quench (pre-TQ) duration and initial current quench, are affected by the average injected fragment size and injection velocity [2]. The line radiation induced by the injected impurities determines the plasma cooling and therefore the pre-thermal quench dynamics. To better monitor the toroidal and poloidal evolution of the radiation, AUG is equipped with several AXUV diode bolometer arrays [3] at five toroidal locations. The AXUV diagnostic system offers higher spatial and temporal resolution than foil bolometers. In two sectors, 2D poloidal coverage was achieved by horizontal and vertical arrays. This allows examination of the localisation of radiation in experiments with disruptions initiated by the versatile AUG SPI system [4]. The time evolution of the radiation profiles is studied in the pre-TQ phase of multiple discharges. Trends with SPI parameters and the limitations of this approach are analysed in detail. These are compared to trends found from INDEX [5] and DREAM [6] simulations. References: - [1] M. Dibon et al. Rev. of Sci. Instrum., 94 043504 (2023) - [2] S. Jachmich et al., Proceedings 49th EPS conference on Plasma Physics, Bordeaux, France, (2023), O2-103. - [3] M. Bernert et al. Rev. of Sci. Instrum., 85 033503 (2014) - [4] P. Heinrich et al. Proceedings 10th REM conference, <https://ft.nephy.chalmers.se/?p=abstract&id=67> (2023) - [5] A. Patel, master’s thesis, [arXiv:2312.03462](https://arxiv.org/abs/2312.03462) (2023) - [6] M. Hoppe et al. Comput. Phys. Commun., 268 108098 (2021)