|Title||Dual array 3D electron cyclotron emission imaging at ASDEX Upgrade|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||I.G.J. Classen, C.W. Domier, NC Luhmann, Jr., A.V. Bogomolov, W. Suttrop, J.E Boom, B.J Tobias, A.JH Donne, ASDEX-Upgrade Team|
|Journal||Review of Scientific Instruments|
|Keywords||cyclotrons, image sensors, plasma devices, plasma diagnostics, plasma instability, sensor arrays, temperature measurement|
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.
|Alternate Title||Rev. Sci. Instrum.|
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