Abstract
A compilation and analysis of charge exchange ion temperature measurements obtained duriang recent high power neutral beam heating experiments on PLT is presented. For titanium gettered discharges using water-cooled carbon limiters (a = 40 cm), PLT produced ion temperatures up to 6.6 keV (T/sub e/ = 3.5 - 4.0 keV) with 2.4 MW-level neutral deuterium injection into low density hydrogen and deuterium plasmas. Over the beam power (P/sub B/ approx. 0.7 - 2.4 MW) and line average electron density (anti n/sub e/ approx. 1.6 - 3.6 x 10/sup 13/ cm/sup -3/) parameter space thus far explored, the ion temperature increase, ..delta..T/sub i/, is observed to scale according to the empirical relation: ..delta..T/sub i/ (keV) = 4.5 +- 0.5 P/sub B/ (MW)/anti n/sub e/(x 10/sup 13/ cm/sup -3/), where anti n/sub e/ is the line average electron density at peak ion temperature.
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