Development of a new tracer-encapsulated solid pellet injection system for more precise control of tracer-impurity-deposit location in LHD

作者：Tamura N^*; Shoji M; Suzuki C; Funaba H; Hayashi H; Maeno H; Yokota M; Ogawa H; Sudo S

来源：Review of Scientific Instruments, 2016, 87(11): 11D615.

DOI：10.1063/1.4962041

A new tracer-encapsulated solid pellet (TESPEL) injection system has been developed additionally for the LHD heliotron. This system has three-dimensionally bended guide tubes, which allows us to inject the TESPEL obliquely on a poloidal cross-section of the LHD plasma. Consequently, this system enables us to control a tracer-impurity-deposited location more precisely. Moreover, this system can make it possible for the tracer impurity to be deposited even only inside the ergodic region (outside a last closed flux surface of the LHD plasma). A stereoscopic fast camera system has been also developed for capturing a three-dimensional TESPEL trajectory. Published by AIP Publishing.

• 出版日期2016-11