Chaudhary, N., Hoefel, U., Hirsch, M., Oosterbeek, J. W., Wolf, R. C., & W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society (2018). Investigation of optically grey electron cyclotron harmonics in Wendelstein 7-X. Talk presented at 20th Joint Workshop on Electron Cyclotron Emission (ECE) and Electron Cyclotron Resonance Heating (ECRH) (EC-20). Greifswald. 2018-05-14 - 2018-05-17.