skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Microwave Scattering System Design for {rho}{sub i}e-Scale Turbulence Measurements on NSTX

Abstract

Despite suppression of {rho}{sub 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 w and k spectra of {rho}{sub 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 |k{sub r}| = 0-20 cm{sup -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 paper will address the global design of the scattering system, such as choice of frequency, size, launching system, and detection system.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., Princeton, NJ (US)
Sponsoring Org.:
USDOE Office of Science (SC) (US)
OSTI Identifier:
828006
Report Number(s):
PPPL-3961
TRN: US0403622
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 19 May 2004
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASPECT RATIO; DESIGN; DETECTION; ELECTRONS; FLUCTUATIONS; LAUNCHING; PROBES; SCATTERING; SHEAR; SPECTRA; TRANSPORT; TURBULENCE; LIGHT SCATTERING; MICROWAVES; TOKAMAKS, NSTX

Citation Formats

D.R. Smith, E. Mazzucato, T. Munsat, H. Park, D. Johnson, L. Lin, C.W. Domier, M. Johnson, and N.C. Luhmann, Jr. Microwave Scattering System Design for {rho}{sub i}e-Scale Turbulence Measurements on NSTX. United States: N. p., 2004. Web. doi:10.2172/828006.
D.R. Smith, E. Mazzucato, T. Munsat, H. Park, D. Johnson, L. Lin, C.W. Domier, M. Johnson, & N.C. Luhmann, Jr. Microwave Scattering System Design for {rho}{sub i}e-Scale Turbulence Measurements on NSTX. United States. doi:10.2172/828006.
D.R. Smith, E. Mazzucato, T. Munsat, H. Park, D. Johnson, L. Lin, C.W. Domier, M. Johnson, and N.C. Luhmann, Jr. Wed . "Microwave Scattering System Design for {rho}{sub i}e-Scale Turbulence Measurements on NSTX". United States. doi:10.2172/828006. https://www.osti.gov/servlets/purl/828006.
@article{osti_828006,
title = {Microwave Scattering System Design for {rho}{sub i}e-Scale Turbulence Measurements on NSTX},
author = {D.R. Smith and E. Mazzucato and T. Munsat and H. Park and D. Johnson and L. Lin and C.W. Domier and M. Johnson and N.C. Luhmann, Jr.},
abstractNote = {Despite suppression of {rho}{sub 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 w and k spectra of {rho}{sub 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 |k{sub r}| = 0-20 cm{sup -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 paper will address the global design of the scattering system, such as choice of frequency, size, launching system, and detection system.},
doi = {10.2172/828006},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed May 19 00:00:00 EDT 2004},
month = {Wed May 19 00:00:00 EDT 2004}
}

Technical Report:

Save / Share: