X-rays Spectroscopy on the PLT and TFTR Tokamaks
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概要
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X-ray spectra of Ti XXI, Ti XXII and Fe XXV have been observed from PLT and TFTR tokamak discharges with curved crystal spectrometers of high spectral resolution (λ/(Δλ) = 15000 - 25000). The spectra have allowed us to perform a detailed comparison with theoretical predictions, and they have been used for diagnosis of central plasma parameters. These diagnostic applications include determination of the central ion and electron temperatures, measurements of the toroidal plasma rotation and investigations of the ionic charge state distribution and impurity transport. The paper will report on recent results from time-resolved measurements of the Fe XXV dielectronic satellite spectrum during sawtooth oscillations in PLT discharges with intense rf (ion cyclotron) heating and it will also present the spectra of Ti XXI which have been obtained from TFTR discharges during compression and first neutral beam heating experiments. Also discussed is the design of a new TFTR systal spectrometer which will allow simultaneous observation of spectra from high-Z impurities, e.g. Cr, Fe, Ni, along different radial chords.
- 核融合科学研究所の論文