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A new multi-tracer pellet injection for a simultaneous study of low- and mid/high-Z impurities in high-temperature
N Tamura1, M Yoshinuma1, X Yin2
1National Institutes of Natural Sciences, National Institute for Fusion Science, Toki, Gifu 509-5292, Japan.
Abstract:
A new multi-tracer technique in the Tracer-Encapsulated Solid Pellet (TESPEL) method has been developed in order to acquire simultaneously the information about the behaviors of various impurities, i.e., to study concurrently the behaviors of low- and mid/high-Z impurities in magnetically confined high-temperature plasmas. In this new technique, an inorganic compound (for example, lithium titanate, Li2TiO3) is proposed to be used as a tracer embedded in the core of the TESPEL, instead of pure elements. The results of the proof-of-principle experiment clearly demonstrate the applicability of the new multi-tracer technique in the TESPEL method for the simultaneous study of behaviors of low- and mid/high-Z impurities in high-temperature plasmas.
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