title: Evaluation of the operating space for density fluctuation measurements employing 2D imaging reflectometry.
abstract: Microwave imaging reflectometry provides broad poloidal coverage as a density fluctuation measurement tool. 2D imaging systems are evaluated for DIII-D relevant conditions using a full-wave reflectometer code, FWR2D. Reasonable correlation of the synthetic diagnostic signal with density fluctuations at the plasma cutoff surface for a wide range of fluctuation parameters is evaluated and achieved for coherent oscillations; also the frequency spectra are compared for relevant fluctuations. The consequences of non-idealities inherent to imaging fluctuations away from the plasma midplane, where receiving antennas view the plasma cutoff at oblique angles, are evaluated for the optimization of these systems.
authors.affiliation: University of California at Davis, Davis, California 95616, USA. xren@ucdavis.edu
authors.forename: X
authors.initials: X
authors.lastname: Ren
authors.forename: B J
authors.initials: BJ
authors.lastname: Tobias
authors.forename: S
authors.initials: S
authors.lastname: Che
authors.forename: C W
authors.initials: CW
authors.lastname: Domier
authors.forename: N C
authors.initials: NC
authors.lastname: Luhmann
authors.forename: C M
authors.initials: CM
authors.lastname: Muscatello
authors.forename: G
authors.initials: G
authors.lastname: Kramer
authors.forename: E
authors.initials: E
authors.lastname: Valeo