Erratum: A novel method of studying the core boron transport at ASDEX Upgrade (Plasma Physics and Controlled Fusion (2018) 60 (085011) DOI: 10.1088/1361-6587/aac870)

The shape of the experimental boron density profile that appears in our paper (figures 2, 3(a) and 12) is incorrect. As a result, the comparisons to the theoretical results presented in section 4 (figures 13 and 15) are also incorrect. The agreement between the experimentally measured and theoretically predicted impurity particle convection is significantly better than was reported in our publication. There were two errors that contributed to the incorrect boron density profile. The first was an error in the absolute intensity calibration of the charge exchange recombination spectroscopy (CXRS) diagnostic used for the analysis [1]. This error was corrected by cross-calibrating to a second system [2] and by using the post-campaign (opposed to the pre-campaign) absolute-intensity calibration measurements. The second error was in the implementation of the ‘COLRAD’ package within the CHICA code [3] that was used to calculate the neutral density populations. The error resulted in incorrect distributions of halo neutrals, which lead to artificially hollow density profiles. This implementation error has since been corrected. Please note that these errors do not affect any other publication. In particular, the authors would like to stress that the impurity density profiles used in previous transport studies [4–7] do not suffer from either of these errors as they were calculated using data from the NBI I CXRS system only [2] and using the ‘FIDASIM’ code rather than ‘COLRAD’ for the neutral distributions. (Figure Presented).