title: High-resolution charge exchange measurements at ASDEX Upgrade.
abstract: The charge exchange recombination spectroscopy (CXRS) diagnostics at ASDEX Upgrade             (AUG) have been upgraded and extended to provide high-resolution measurements of             impurity ion temperature, density, and rotation profiles. The existing core toroidal             CXRS diagnostic has been refurbished to increase the level of signal, thus enabling             shorter exposure times down to 3.5 ms. Additional lines of sight provide more detailed             profiles and enable simultaneous measurements of multiple impurities. In addition, a new             CXRS system has been installed, which allows for the measurement of poloidal impurity             ion rotation in the plasma edge with high temporal (1.9 ms) and spatial resolution (down             to 5 mm). A new wavelength correction method has been implemented to perform in situ             wavelength calibrations on a shot-to-shot basis. Absolute measurements of the poloidal             impurity ion rotation with uncertainties smaller than 1.5 km/s have been obtained.             Comparison of all the CXRS measurements provides a consistency check of the diagnostics             and good agreement has been found for all of the CXRS systems.
authors.affiliation: Max-Planck-Institut für Plasmaphysik, EURATOM Association, Boltzmannstr. 2, 85748 Garching, Germany. Eleonora.Viezzer@ipp.mpg.de
authors.forename: E
authors.initials: E
authors.lastname: Viezzer
authors.forename: T
authors.initials: T
authors.lastname: Pütterich
authors.forename: R
authors.initials: R
authors.lastname: Dux
authors.forename: R M
authors.initials: RM
authors.lastname: McDermott