Howard, John2015-12-132015-12-130741-3335http://hdl.handle.net/1885/93492The motional Stark effect measurement of magnetic field pitch angle in tokamaks is a mature and powerful technique for estimating plasma current density in tokamaks. However, its range of applicability is limited by the requirement that σ and π manifoldKeywords: Angle measurement; Coherent light; Current density; Interferometers; Light modulation; Light polarization; Magnetic fields; Plasma confinement; Polarimeters; Magnetic field pitch angle; Stark effect measurement; Tokamak devices199910.1088/0741-3335/41/2/0122015-12-12