Fast sweeping reflectometry upgrade on Tore Supra a

摘要

In order to study the temporal dynamics of turbulence, the sweep time of our reflectometry has been shortened from 20 to 2 μs with 1 μs dead time. Detailed technical aspects of the upgrade are given, namely, about the stability of the ramp generation, the detection setup, and the fast acquisition module. A review of studies (velocity measurement of the turbulence, modifications of the wavenumber spectrum, radial mapping of correlation time, etc.) offered by such improvements is presented. © 2010 American Institute of Physics Article Outline INTRODUCTION FAST-SWEEP SYSTEM TURBULENCE PROFILE MEASUREMENTS