title: Stokes-Doppler coherence imaging for ITER boundary tomography.
abstract: An optical coherence imaging system is presently being designed for impurity transport studies and other applications on ITER. The wide variation in magnetic field strength and pitch angle (assumed known) across the field of view generates additional Zeeman-polarization-weighting information that can improve the reliability of tomographic reconstructions. Because background reflected light will be somewhat depolarized analysis of only the polarized fraction may be enough to provide a level of background suppression. We present the principles behind these ideas and some simulations that demonstrate how the approach might work on ITER. The views and opinions expressed herein do not necessarily reflect those of the ITER Organization.
authors.affiliation: Plasma Research Laboratory, The Australian National University, Canberra, Australia.
authors.forename: J
authors.initials: J
authors.lastname: Howard
authors.affiliation: ITER Organization, Route de Vinon, F-13115 St. Paul lez Durance, France.
authors.forename: M
authors.initials: M
authors.lastname: Kocan
authors.affiliation: ITER Organization, Route de Vinon, F-13115 St. Paul lez Durance, France.
authors.forename: S
authors.initials: S
authors.lastname: Lisgo
authors.affiliation: ITER Organization, Route de Vinon, F-13115 St. Paul lez Durance, France.
authors.forename: R
authors.initials: R
authors.lastname: Reichle