A Collective Scattering System for Measuring Electron Gyroscale Fluctuations on the National Spherical Torus Experiment

D.R. Smith, E. Mazzucato, W. Lee, H.K. Park, C.W. Domier, and N.C. Luhmann, Jr.

Princeton University. Plasma Physics Laboratory.

关键词: Nstx;    Transport;    70 Plasma Physics And Fusion Technology;    Scattering;    Plasma;   

RP-ID  :  PPPL-4381
RP-ID  :  DE-ACO2-09CH11466
RP-ID  :  950697

美国|英语

来源: UNT Digital Library

【 摘 要 】

A collective scattering system has been installed on the National Spherical Torus Experiment (NSTX) to measure electron gyroscale fluctuations in NSTX plasmas. Up to five distinct wavenumbers are measured simultaneously, and the large toroidal curvature of NSTX plasmas provides enhanced spatial localization. Steerable optics can position the scattering volume throughout the plasma from the magnetic axis to the outboard edge. Initial measurements indicate rich turbulent dynamics on the electron gyroscale. The system will be a valuable tool for investigating the connection between electron temperature gradient turbulence and electron thermal transport in NSTX plasmas.