Kappatou, A., Jaspers, R. J. E., Delabie, E., Marchuk, O., Biel, W., & Jakobs, M. A. (2012). Method to obtain absolute impurity density profiles combining charge exchange and beam emission spectroscopy without absolute intensity calibration. Review of Scientific Instruments, 83, 10D519. https://doi.org/10.1063/1.4732847
Jaspers, R. J. E., Scheffer, M., Kappatou, A., van der Valk, N. C. J., Durkut, M., Snijders, B., … Dunai, D. (2012). A high etendue spectrometer suitable for core charge eXchange recombination spectroscopy on ITER. Review of Scientific Instruments, 83, 10D515. https://doi.org/10.1063/1.4732058
Kappatou, A., Delabie, E., Jaspers, R. J. E., & von Hellermann, M. G. (2012). Feasibility of non-thermal helium measurements with charge exchange spectroscopy on ITER. Nuclear Fusion, 52(4), 043007. https://doi.org/10.1088/0029-5515/52/4/043007 (Original work published 2025)