title: Development of a new tracer-encapsulated solid pellet injection system for more precise control of tracer-impurity-deposit location in LHD.
abstract: 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.
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Tamura
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Shoji
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: C
authors.initials: C
authors.lastname: Suzuki
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Funaba
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Hayashi
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Maeno
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yokota
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ogawa
authors.affiliation: Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Sudo