Measurement of Radial Correlation Lengths of Electron Density Fluctuations in Heliotron J Using O-Mode Reflectometry

Niels SMITH; Kazunobu NAGASAKI; Josefine H.E. PROLL; Hiroyuki OKADA; Takashi MINAMI; Shin-ichiro KADO; Shinji KOBAYASHI; Shinsuke OHSHIMA; Shigeru KONOSHIMA; Tohru MIZUUCHI; Yuji NAKAMURA; Akihiro ISHIZAWA; Tsuyoshi TOMITA; Takeshi FUKUDA; Yasuto KONDO

doi:10.1585/pfr.15.1202054

Rapid Communications

Measurement of Radial Correlation Lengths of Electron Density Fluctuations in Heliotron J Using O-Mode Reflectometry

Niels SMITH, Kazunobu NAGASAKI, Josefine H.E. PROLL, Hiroyuki OKADA, Takashi MINAMI, Shin-ichiro KADO, Shinji KOBAYASHI, Shinsuke OHSHIMA, Shigeru KONOSHIMA, Tohru MIZUUCHI, Yuji NAKAMURA, Akihiro ISHIZAWA, Tsuyoshi TOMITA, Takeshi FUKUDA, Yasuto KONDO

著者情報

キーワード: O-mode reflectometry, radial correlation length, electron density fluctuation, Heliotron J, turbulent transport

ジャーナルフリー

2020 年 15 巻 p. 1202054

DOI https://doi.org/10.1585/pfr.15.1202054

詳細

抄録

The radial correlation length L_rof electron density fluctuations has been measured using a two-channel O-mode reflectometer system in the helical-axis fusion plasma experimental device Heliotron J. The experimental results show that L_ris around 1.4 ± 0.7 mm in three different magnetic field bumpiness configurations (i.e. low, medium and high) for the low-density electron cyclotron heating (ECH) discharges. In high-density neutral beam injection (NBI) discharges with HIGP and pellet injection, L_ris found to be around 1 ± 0.2 mm.

責任著者(Corresponding author)

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