Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas

Nao Yoneda, Taiichi Shikama, Hideki Zushi, Kazuaki Hanada, Akinobu Fujikawa, Takumi Onchi, Kengoh Kuroda, Kuniaki Nii, Masahiro Hasuo, Makoto Hasegawa, Hiroshi Idei, Kazuo Nakamura, Yoshihiko Nagashima, Aki Higashijima, Takahiro Nagata

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Toroidal electron cyclotron resonance (ECR) plasma is an ECR heated plasma in an open toroidal magnetic field. The plasma contains no toroidal current and is used for the pre-ionization and non-inductive startup of a tokamak plasma. To obtain a deeper understanding of the basic properties of the plasmas produced in the spherical tokamak QUEST (Q-shu University Experiment with steady-state Spherical Tokamak), we have developed an optical emission spectroscopy system with multiple viewing chords and have used it to measure the spatial distributions of the toroidal and poloidal flow velocities of C2+ ions. We compare the measured velocities with those calculated from the ion drift equations using the plasma parameters reported for a similar spherical tokamak, LATE (the Low Aspect Ratio Torus Experiment).

Original languageEnglish
Article number3402087
JournalPlasma and Fusion Research
Volume13
DOIs
Publication statusPublished - Jan 1 2018

Fingerprint

electron cyclotron resonance
flow velocity
impurities
magnetic fields
ions
low aspect ratio
optical emission spectroscopy
spatial distribution
ionization

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas. / Yoneda, Nao; Shikama, Taiichi; Zushi, Hideki; Hanada, Kazuaki; Fujikawa, Akinobu; Onchi, Takumi; Kuroda, Kengoh; Nii, Kuniaki; Hasuo, Masahiro; Hasegawa, Makoto; Idei, Hiroshi; Nakamura, Kazuo; Nagashima, Yoshihiko; Higashijima, Aki; Nagata, Takahiro.

In: Plasma and Fusion Research, Vol. 13, 3402087, 01.01.2018.

Research output: Contribution to journalArticle

Yoneda, Nao ; Shikama, Taiichi ; Zushi, Hideki ; Hanada, Kazuaki ; Fujikawa, Akinobu ; Onchi, Takumi ; Kuroda, Kengoh ; Nii, Kuniaki ; Hasuo, Masahiro ; Hasegawa, Makoto ; Idei, Hiroshi ; Nakamura, Kazuo ; Nagashima, Yoshihiko ; Higashijima, Aki ; Nagata, Takahiro. / Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas. In: Plasma and Fusion Research. 2018 ; Vol. 13.
@article{53075168f6d447ac9cd9a5795e6fbc08,
title = "Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas",
abstract = "Toroidal electron cyclotron resonance (ECR) plasma is an ECR heated plasma in an open toroidal magnetic field. The plasma contains no toroidal current and is used for the pre-ionization and non-inductive startup of a tokamak plasma. To obtain a deeper understanding of the basic properties of the plasmas produced in the spherical tokamak QUEST (Q-shu University Experiment with steady-state Spherical Tokamak), we have developed an optical emission spectroscopy system with multiple viewing chords and have used it to measure the spatial distributions of the toroidal and poloidal flow velocities of C2+ ions. We compare the measured velocities with those calculated from the ion drift equations using the plasma parameters reported for a similar spherical tokamak, LATE (the Low Aspect Ratio Torus Experiment).",
author = "Nao Yoneda and Taiichi Shikama and Hideki Zushi and Kazuaki Hanada and Akinobu Fujikawa and Takumi Onchi and Kengoh Kuroda and Kuniaki Nii and Masahiro Hasuo and Makoto Hasegawa and Hiroshi Idei and Kazuo Nakamura and Yoshihiko Nagashima and Aki Higashijima and Takahiro Nagata",
year = "2018",
month = "1",
day = "1",
doi = "10.1585/PFR.13.3402087",
language = "English",
volume = "13",
journal = "Plasma and Fusion Research",
issn = "1880-6821",
publisher = "The Japan Society of Plasma Science and Nuclear Fusion Research (JSPF)",

}

TY - JOUR

T1 - Spectroscopic measurements of impurity ion toroidal and poloidal flow velocities and their dependence on vertical magnetic field in QUEST toroidal ECR plasmas

AU - Yoneda, Nao

AU - Shikama, Taiichi

AU - Zushi, Hideki

AU - Hanada, Kazuaki

AU - Fujikawa, Akinobu

AU - Onchi, Takumi

AU - Kuroda, Kengoh

AU - Nii, Kuniaki

AU - Hasuo, Masahiro

AU - Hasegawa, Makoto

AU - Idei, Hiroshi

AU - Nakamura, Kazuo

AU - Nagashima, Yoshihiko

AU - Higashijima, Aki

AU - Nagata, Takahiro

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Toroidal electron cyclotron resonance (ECR) plasma is an ECR heated plasma in an open toroidal magnetic field. The plasma contains no toroidal current and is used for the pre-ionization and non-inductive startup of a tokamak plasma. To obtain a deeper understanding of the basic properties of the plasmas produced in the spherical tokamak QUEST (Q-shu University Experiment with steady-state Spherical Tokamak), we have developed an optical emission spectroscopy system with multiple viewing chords and have used it to measure the spatial distributions of the toroidal and poloidal flow velocities of C2+ ions. We compare the measured velocities with those calculated from the ion drift equations using the plasma parameters reported for a similar spherical tokamak, LATE (the Low Aspect Ratio Torus Experiment).

AB - Toroidal electron cyclotron resonance (ECR) plasma is an ECR heated plasma in an open toroidal magnetic field. The plasma contains no toroidal current and is used for the pre-ionization and non-inductive startup of a tokamak plasma. To obtain a deeper understanding of the basic properties of the plasmas produced in the spherical tokamak QUEST (Q-shu University Experiment with steady-state Spherical Tokamak), we have developed an optical emission spectroscopy system with multiple viewing chords and have used it to measure the spatial distributions of the toroidal and poloidal flow velocities of C2+ ions. We compare the measured velocities with those calculated from the ion drift equations using the plasma parameters reported for a similar spherical tokamak, LATE (the Low Aspect Ratio Torus Experiment).

UR - http://www.scopus.com/inward/record.url?scp=85064681666&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064681666&partnerID=8YFLogxK

U2 - 10.1585/PFR.13.3402087

DO - 10.1585/PFR.13.3402087

M3 - Article

AN - SCOPUS:85064681666

VL - 13

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

SN - 1880-6821

M1 - 3402087

ER -