Accession Number : ADA191323


Title :   Thomson Scattering for Determining Electron Concentrations and Temperatures in an Inductively Coupled Plasma. 1. Assessment of the Technique for a Lo -Flow, Low-Power Plasma.


Descriptive Note : Technical rept.,


Corporate Author : INDIANA UNIV AT BLOOMINGTON DEPT OF CHEMISTRY


Personal Author(s) : Marshall, Kim A ; Hieftie, Gary M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a191323.pdf


Report Date : 15 Feb 1988


Pagination or Media Count : 26


Abstract : Electron number densities and electron temperatures have been measured by multichannel Thomson scattering in a low-flow low-power inductively coupled plasma. Preliminary electron-concentration values agree well with those previously determined, and spatial variation in both electron concentration and temperature are largely consistent with existing models of the ICP. One difference is that aqueous aerosol was found here to depress the electron number density throughout the plasma. Unfortunately, the intensities measured in the wings of the Thomson-scattering spectrum large uncertainties, making data analysis difficult and the measured electron temperatures less reliable than desired.


Descriptors :   *ELECTRON DENSITY , *PLASMAS(PHYSICS) , *ELECTRON ENERGY , AEROSOLS , CONCENTRATION(COMPOSITION) , COUPLING(INTERACTION) , DATA PROCESSING , FLOW , LIQUIDS , LOW POWER , SPATIAL DISTRIBUTION , VARIATIONS


Subject Categories : Plasma Physics and Magnetohydrodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE