Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session GP11: Poster Session III: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: DIII-D
Low Temperature Plasma
FUND: Dusty Plasmas; Plasma Sources
9:30 AM - 12:30 PM
Tuesday, October 18, 2022
Room: Exhibit Hall A and Online
Abstract: GP11.00132 : The absorption profile analysis of electron cyclotron waves by three dimensional ray tracing simulation under the overdense state in the magnetospheric plasma device RT-1
Presenter:
Takahiro Mori
(The Univeristy of Tokyo)
Authors:
Takahiro Mori
(The Univeristy of Tokyo)
Masaki Nishiura
(Natl Inst Fusion Science-Toki)
Naoki Kenmochi
(National Institute for Fusion Science)
Ryoma Yanai
(National Institute for Fusion Science)
Kenji UEDA
(Univ of Tokyo)
In this study, we have developed a ray trace code for the RT-1 to analyze a power deposition of EC waves and measured the profiles of electron density and electron temperature distributions necessary for the calculation from experiments.
As a result of spectroscopy, the electron temperature profile with two peaks of about 20 eV was obtained. Compared to the results of the two-dimensional calculation[Mori et al. PFR 2022], the absorption efficiency in the three-dimensional calculation model is increases when the cutoff density occurs. This is thought to be due to the effect of EM wave wraparound in three dimensions and reaching the resonance layer on the opposite side of the incident position.
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