Plasma and Fusion Research

Volume 17, 1202093 (2022)

Rapid Communications

First Observation of Pellet Ablation Clouds Using Two-Directional Simultaneous Photography in GAMMA 10/PDX

Masayuki YOSHIKAWA, Yousuke NAKASHIMA, Junko KOHAGURA, Yoriko SHIMA, Hiroyuki NAKANISHI, Youhei TAKEDA, Shinji KOBAYASHI¹⁾, Ryutaro MINAMI, Naomichi EZUMI and Mizuki SAKAMOTO

: Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
1): Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

(Received 12 May 2022 / Accepted 22 June 2022 / Published 15 August 2022)

Abstract

The study of pellet ablation mechanisms is an important subject for plasma fueling in fusion plasmas. In GAMMA 10/PDX, sub-millimeter hydrogen pellet injection experiments are conducted in the higher electron density plasma for detached plasma experiments. We observed the pellet ablation cloud by two-directional simultaneous photography during the GAMMA 10/PDX pellet injection experiments. The three-dimensional pellet ablation cloud and its trajectory were clearly obtained for the first time.

Keywords

pellet ablation cloud, two-directional simultaneous photography, high-speed camera, GAMMA 10/PDX

DOI: 10.1585/pfr.17.1202093

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