A new multi-tracer pellet injection for a simultaneous study of low- and mid/high-Z impurities in high-temperature plasmas

N Tamura; M Yoshinuma; X Yin; K Ida; C Suzuki; M Shoji; K Mukai; H Funaba

doi:10.1063/5.0043495

A new multi-tracer pellet injection for a simultaneous study of low- and mid/high-Z impurities in high-temperature plasmas

Rev Sci Instrum. 2021 Jun 1;92(6):063516. doi: 10.1063/5.0043495.

Authors

N Tamura¹, M Yoshinuma¹, X Yin², K Ida¹, C Suzuki¹, M Shoji¹, K Mukai¹, H Funaba¹

Affiliations

¹ National Institutes of Natural Sciences, National Institute for Fusion Science, Toki, Gifu 509-5292, Japan.
² University of South China, Hengyang, Hunan 421001, China.

PMID: 34243592
DOI: 10.1063/5.0043495

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.