A system is under construction which will make use of the laser and collection optics of an existing multichannel Thomson scattering system on the tokamak fusion test reactor (TFTR). A scanning sampling mechanism will divert signal from a 10hyphen;cm segment of the radialhyphen;beam path to a spectrometerndash;detector system which is optimized for low temperatures and densities. In the absence of stray laser light and background plasma light the system will be capable of measuring temperatures down to 3ndash;5 eV at 1ndash;3times;1011cmminus;3minimum densities.
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