scholarly journals Spectroscopic Measurement of Hydrogen Atom Density in a Plasma Produced with 28 GHz ECH in QUEST

Atoms ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 44
Author(s):  
Satoru Mori ◽  
Taiichi Shikama ◽  
Kazuaki Hanada ◽  
Nao Yoneda ◽  
Arseniy Kuzmin ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Hydrogen Atom ◽  
Ground State ◽  
Electron Cyclotron ◽  
Spectroscopic Measurement ◽  
Abel Inversion ◽  
Spherical Tokamak ◽  
Electron Cyclotron Heating ◽  
Ionization Degree ◽  
Atom Density

The spatial distribution of the hydrogen atom density was evaluated in a spherical tokamak (ST) plasma sustained only with 28 GHz electron cyclotron heating (ECH). The radially resolved Hδ emissivity was measured using multiple viewing chord spectroscopy and Abel inversion. A collisional-radiative (CR) model analysis of the emissivity resulted in a ground-state hydrogen atom density of 1015–1016 m−3 and an ionization degree of 1–0.85 in the plasma.

High voltage electrical system of 8.56 GHz CW klystron for electron cyclotron heating on QUEST spherical tokamak

2019 ◽  
Vol 146 ◽  
pp. 2567-2570
Author(s):  
T. Onchi ◽  
H. Idei ◽  
K. Nakamura ◽  
T. Nagata ◽  
S. Kawasaki ◽  
...  
Keyword(s):  
High Voltage ◽  
Electron Cyclotron ◽  
Spherical Tokamak ◽  
Electron Cyclotron Heating ◽  
Electrical System

Electron cyclotron heating in the compact ignition tokamak

1987 ◽  
Author(s):  
E. Mazzucato ◽  
I. Fidone ◽  
R. L. Meyer
Keyword(s):  
Electron Cyclotron ◽  
Electron Cyclotron Heating

Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device

1995 ◽  
Vol 26 (1-4) ◽  
pp. 159-165 ◽  
Author(s):  
K. Nagasaki ◽  
H. Zushi ◽  
T. Mizuuchi ◽  
K. Kondo ◽  
F. Sano ◽  
...  
Keyword(s):  
Electron Cyclotron ◽  
Electron Cyclotron Heating

Suppression of Trapped Energetic Ions Driven Resistive Interchange Modes with Electron Cyclotron Heating in a Helical Plasma

2017 ◽  
Vol 118 (12) ◽  
Author(s):  
X. D. Du ◽  
K. Toi ◽  
S. Ohdachi ◽  
K. Y. Watanabe ◽  
H. Takahashi ◽  
...  
Keyword(s):  
Electron Cyclotron ◽  
Electron Cyclotron Heating ◽  
Energetic Ions
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