Microwave scattering system design for rho(e) scale turbulence measurements on NSTX

作者：Smith DR^*; Mazzucato E; Munsat T; Park H; Johnson D; Lin L; Domier CW; Johnson M; Luhmann NC

来源：Review of Scientific Instruments, 2004, 75(10): 3840-3842.

DOI：10.1063/1.1788851

Despite suppression of rho(i) scale turbulent fluctuations, electron thermal transport remains anomalous in NSTX. For this reason, a microwave scattering system will be deployed to directly observe the omega and k spectra of rho(e) scale turbulent fluctuations and characterize the effect on electron thermal transport. The scattering system will employ a Gaussian probe beam produced by a high power 280 GHz microwave source. A five-channel heterodyne detection system will measure radial turbulent spectra in the range parallel tok(r)parallel to=0-20 cm(-1). Inboard and outboard launch configurations cover most of the normalized minor radius. Improved spatial localization of measurements is achieved with low aspect ratio and high magnetic shear configurations. This article will address the global design of the scattering system, such as choice of frequency, size, launching system, and detection system.

• 出版日期2004-10