Abstract
Nonthermal spectra of full titanium Kα lines have been successfully measured from plasmas with suprathermal electrons generated by lower-hybrid waves in the JIPPT-IIU tokamak using a compact and wide-band crystal spectrometer. Increase in total intensities of the all Kα lines has been observed at decreasing electron densities below 7×10 12 cm -3 and strong Kα emissions from partially M-shell-ionized ions are found. These results suggest the spectra are strongly characterized by the nonthermal plasma. Analysis is carried out under assumptions of some radial profiles of the suprathermal electrons. As a result, the spectra can be explained by the inner-shell ionization due to the suprathermal electrons.
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