2-D PSD Diagnostic System for the Pellet Trajectory in LHD Plasmas

Mitsuyasu HOSHINO; Ryuichi SAKAMOTO; Hiroshi YAMADA; Yasuhiko ITOH; Kohki KUMAGAI; Ryuhei KUMAZAWA; Tetsuo WATARI; the LHD Experimental Group

doi:10.1585/pfr.3.002

Letters

2-D PSD Diagnostic System for the Pellet Trajectory in LHD Plasmas

Mitsuyasu HOSHINO, Ryuichi SAKAMOTO, Hiroshi YAMADA, Yasuhiko ITOH, Kohki KUMAGAI, Ryuhei KUMAZAWA, Tetsuo WATARI, the LHD Experimental Group

著者情報

キーワード: fueling, solid hydrogen, ablation, pellet trajectory, position sensitive detector, rocket effect, Large Helical Device

ジャーナルフリー

2008 年 3 巻 p. 002

DOI https://doi.org/10.1585/pfr.3.002

詳細

抄録

Ablation of a solid hydrogen pellet in hot plasmas of Large Helical Device (LHD) has been studied. A position sensitive detector (PSD) diagnostics has been newly installed to measure the trajectory of ablating pellets. 2-D diagnostics enables the measurement with high time (1 MHz) and spatial resolutions (80 μm). A 3-D pellet trajectory can be described by a combination of 2-D images and information of initial pellet direction and velocity. A deflection of the pellet trajectory in the neutral beam injection (NBI) heated plasmas of LHD has been observed. Means of improving the measurement accuracy of this system are also discussed.

責任著者(Corresponding author)

J-STAGEへの登録はこちら（無料）