@article{7879, author = {I. G.J. Classen and C. W. Domier and N. C. Luhmann Jr. and A. V. Bogomolov and W. Suttrop and J. E. Boom and B. J. Tobias and A. J. H. Donne and ASDEX Upgrade Team}, title = {Dual array 3D electron cyclotron emission imaging at ASDEX Upgrade}, abstract = {In a major upgrade, the (2D) electron cyclotron emission imaging diagnostic (ECEI) at ASDEX Upgrade has been equipped with a second detector array, observing a different toroidal position in the plasma, to enable quasi-3D measurements of the electron temperature. The new system will measure a total of 288 channels, in two 2D arrays, toroidally separated by 40 cm. The two detector arrays observe the plasma through the same vacuum window, both under a slight toroidal angle. The majority of the field lines are observed by both arrays simultaneously, thereby enabling a direct measurement of the 3D properties of plasma instabilities like edge localized mode filaments.}, year = {2014}, journal = {Review of Scientific Instruments}, volume = {85}, number = {11}, pages = {11D833}, doi = {10.1063/1.4891061}, language = {eng}, }