scholarly journals Measurements of Ion Temperature and Flow Velocity in Divertor Simulator MAP-II from Hydrogenic Helium Line Emission

2003 ◽  
Vol 79 (9) ◽  
pp. 841-843 ◽  
Author(s):  
Shinichiro KADO ◽  
Taiichi SHIKAMA
Keyword(s):  
Flow Velocity ◽  
Line Emission ◽  
Ion Temperature ◽  
Helium Line

Coherence-imaging spectroscopy for 2D distribution of ion temperature and flow velocity in a laboratory magnetosphere

2018 ◽  
Vol 89 (10) ◽  
pp. 10D133 ◽  
Author(s):  
K. Nakamura ◽  
M. Nishiura ◽  
N. Takahashi ◽  
Z. Yoshida ◽  
N. Kenmochi ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Imaging Spectroscopy ◽  
Ion Temperature ◽  
Coherence Imaging

Design Considerations and Preliminary Characterizations of a Kilowatt-Plus Microwave-Induced Plasma

1988 ◽  
Vol 42 (6) ◽  
pp. 1061-1065 ◽  
Author(s):  
Kevin B. Cull ◽  
Jon W. Carnahan
Keyword(s):  
Line Emission ◽  
Helical Flow ◽  
Microwave Generator ◽  
Microwave Induced Plasma ◽  
Design Considerations ◽  
Resonator Cavity ◽  
Helium Line ◽  
Intensity Ratios ◽  
Ion Emission ◽  
Generator Output

A high-powered helium microwave-induced plasma was developed, and preliminary characterizations are presented. This kilowatt-plus microwave-induced plasma (KiP-MIP) was contained in a helical flow quartz torch. Power was transferred via waveguides from a 3.0-kW, 2.45-GHz, 120-pulses-per-second microwave generator to a waveguide-to-coaxial converter. A modified Beenakker TM010 resonator cavity was used to focus the energy. Effects of the magnitude of applied power on helium line emission intensities were studied, as well as comparisons of the temporal output of generator output and helium line emission. Introduction of gaseous halogens (Cl2, CBr4) produced intense ion emission which follows the intensity ratios commonly observed in He-MIPs.

Neutral helium line emission for edge plasma conditions

2005 ◽  
Vol 337-339 ◽  
pp. 1101-1105 ◽  
Author(s):  
F.B. Rosmej ◽  
R. Stamm ◽  
S. Fritzsche ◽  
H. Capes ◽  
M. Koubiti ◽  
...  
Keyword(s):  
Line Emission ◽  
Edge Plasma ◽  
Helium Line

Helium line emission from Be stars

1994 ◽  
Vol 420 ◽  
pp. 803 ◽  
Author(s):  
Krishna M. V. Apparao ◽  
S. P. Tarafdar
Keyword(s):  
Line Emission ◽  
Be Stars ◽  
Helium Line

scholarly journals Poloidal Rotation and Edge Ion Temperature Measurements Using Spectroscopy Diagnostic on Aditya-U Tokamak

Atoms ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 93
Author(s):  
Gaurav Shukla ◽  
Malay B. Chowdhuri ◽  
Kajal Shah ◽  
Nandini Yadava ◽  
Ranjana Manchanda ◽  
...  
Keyword(s):  
High Resolution ◽  
Line Emission ◽  
Rotation Velocity ◽  
Spectral Lines ◽  
Tokamak Plasma ◽  
Vacuum Vessel ◽  
Ion Temperature ◽  
Minor Radius ◽  
Impurity Ion ◽  
Poloidal Rotation

The impurity ion poloidal rotation and ion temperature from the Aditya-U tokamak plasma have been measured using a high-resolution spectroscopic diagnostic. It comprises of a high resolution, 1 m, f/8.7, Czerny-Turner configuration spectrometer along with charge coupled device (CCD) detector. The system monitors the spectral line emission of C2+ impurity ions at 464.74 nm from the top port of the Aditya-U vacuum vessel with the lines of sight covering the plasma minor radius from r = 11.55 cm to 21.55 cm. The impurity ion poloidal rotation velocity and temperature have been estimated using the Doppler shift and Doppler broadening of the spectral lines respectively. The maximum poloidal rotation at a radial location of 21.55 cm in the edge of the plasma during the plasma current flat top was observed to be ~4 km/s for the analyzed discharges and the ion temperatures measured in the edge were in the range of 32–40 eV.

Transition layer between two magnetized plasmas

1979 ◽  
Vol 22 (3) ◽  
pp. 515-524 ◽  
Author(s):  
L. C. Lee ◽  
J. R. Kan
Keyword(s):  
Electron Temperature ◽  
Flow Velocity ◽  
Transition Layer ◽  
Potential Difference ◽  
Current Layer ◽  
Ion Temperature ◽  
Kinetic Formulation ◽  
Two Sides ◽  
Relative Flow ◽  
Asymptotic Potential

Structures of the current layer between two magnetized anisothermal plasmas are studied on the basis of a kinetic formulation. It is shown that the structure of the current layer is dominantly controlled by the hotter species of the plasmas. The thickness is characterized by the ion gyroradius if the ion temperature is much greater than the electron temperature. The structure is, in general, insensitive to the asymptotic potential difference and the relative flow velocity between plasmas on the two sides.

Helium line emission spectroscopy in recombining detached plasmas

2018 ◽  
Vol 25 (6) ◽  
pp. 063303 ◽  
Author(s):  
Shin Kajita ◽  
Kensuke Suzuki ◽  
Hirohiko Tanaka ◽  
Noriyasu Ohno
Keyword(s):  
Emission Spectroscopy ◽  
Line Emission ◽  
Helium Line

Measurements of ion temperature and flow velocity using symmetric and asymmetric double probes in the boundary plasma of the JFT-2M tokamak

1998 ◽  
Vol 38 (11) ◽  
pp. 1665-1674 ◽  
Author(s):  
K Uehara ◽  
T Kawakami ◽  
H Amemiya ◽  
K Höthker ◽  
A Cosler ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Ion Temperature ◽  
Boundary Plasma
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