Title :
Polarimetry–Interferometry Diagnostic for Measurement of Magnetic and Density Perturbations in the High-Temperature Plasma Core
Author :
Lin, Liang ; Ding, W.X. ; Bergerson, W.F. ; Brower, D.L.
Author_Institution :
Dept. of Phys. & Astron., Univ. of California at Los Angeles, Los Angeles, CA, USA
Abstract :
Diagnostic techniques to measure the internal structure of density and magnetic perturbations, both equilibrium and turbulent, are becoming increasingly important for assessing the confinement properties of high-temperature magnetically confined fusion plasmas. Recent advances in laser-based polarimetry-interferometry techniques now permit simultaneous measurements of both density and magnetic field with fast time response and high phase resolution. Images of intrinsic tearing instabilities driven by radial gradients in the parallel current density are shown for the combined measurements.
Keywords :
current density; interferometry; perturbation techniques; plasma confinement; plasma density; plasma diagnostics; plasma magnetohydrodynamics; plasma transport processes; plasma turbulence; polarimetry; tearing instability; confinement properties; density perturbation; high-temperature magnetically confined fusion plasmas; high-temperature plasma core; intrinsic tearing instabilities; laser-based polarimetry-interferometry techniques; magnetic perturbation; parallel current density; radial gradients; turbulent; Density measurement; Extraterrestrial measurements; Magnetic resonance imaging; Magnetomechanical effects; Plasma measurements; Plasmas; Toroidal magnetic fields; Faraday rotation; fusion device; interferometry; plasma diagnostics; polarimetry; waves and instabilities;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2011.2158556
