Optical diagnostic to measure ion temperature and parallel velocity fluctuations on the Tokamak Fusion Test Reactor

1995 ◽  
Vol 66 (1) ◽  
pp. 845-847 ◽  
Author(s):  
H. T. Evensen ◽  
R. Durst ◽  
R. J. Fonck ◽  
S. F. Paul
Keyword(s):  
Ion Temperature ◽  
Velocity Fluctuations ◽  
Optical Diagnostic ◽  
Test Reactor

Measurements of ion temperature fluctuations in the Tokamak Fusion Test Reactor

1998 ◽  
Vol 38 (2) ◽  
pp. 237-248 ◽  
Author(s):  
H.T Evensen ◽  
R.J Fonck ◽  
S.F Paul ◽  
G Rewoldt ◽  
S.D Scott ◽  
...  
Keyword(s):  
Temperature Fluctuations ◽  
Ion Temperature ◽  
Test Reactor

Notched velocity profiles and the radial electric field in high ion temperature plasmas in the Tokamak Fusion Test Reactor

1998 ◽  
Vol 5 (3) ◽  
pp. 665-681 ◽  
Author(s):  
D. R. Ernst ◽  
M. G. Bell ◽  
R. E. Bell ◽  
C. E. Bush ◽  
Z. Chang ◽  
...  
Keyword(s):  
Electric Field ◽  
Radial Electric Field ◽  
Velocity Profiles ◽  
Ion Temperature ◽  
Test Reactor

scholarly journals Observational tests of the properties of turbulence in the Very Local Interstellar Medium

2010 ◽  
Vol 17 (6) ◽  
pp. 785-793 ◽  
Author(s):  
S. R. Spangler ◽  
A. H. Savage ◽  
S. Redfield
Keyword(s):  
Solar Wind ◽  
Interstellar Medium ◽  
Large Scale ◽  
Larmor Radius ◽  
Published Data ◽  
Local Interstellar Medium ◽  
Ion Temperature ◽  
Velocity Fluctuations ◽  
Single Temperature ◽  
Wide Range

Abstract. The Very Local Interstellar Medium (VLISM) contains clouds which consist of partially-ionized plasma. These clouds can be effectively diagnosed via high resolution optical and ultraviolet spectroscopy of the absorption lines they form in the spectra of nearby stars. Information provided by these spectroscopic measurements includes values for ξ, the root-mean-square velocity fluctuation due to turbulence in these clouds, and T, the ion temperature, which may be partially determined by dissipation of turbulence. We consider whether this turbulence resembles the extensively studied and well-diagnosed turbulence in the solar wind and solar corona. Published observations are used to determine if the velocity fluctuations are primarily transverse to a large-scale magnetic field, whether the temperature perpendicular to the large scale field is larger than that parallel to the field, and whether ions with larger Larmor radii have higher temperatures than smaller gyroradius ions. We ask if the spectroscopically-deduced parameters such as ξ and T depend on the direction on the sky. We also consider the degree to which a single temperature T and turbulence parameter ξ account for the spectral line widths of ions with a wide range of masses. A preliminary examination of the published data shows no evidence for anisotropy of the velocity fluctuations or temperature, nor Larmor radius-dependent heating. These results indicate differences between solar wind and Local Cloud turbulence. Possible physical reasons for these differences are discussed.

scholarly journals Ion temperature by charge exchange neutral analysis from vertical sightlines on the Tokamak Fusion Test Reactor

1987 ◽  
Author(s):  
C.L. Fiore ◽  
S.S. Medley ◽  
G.W. Hammett ◽  
R. Kaita ◽  
S.D. Scott
Keyword(s):  
Charge Exchange ◽  
Ion Temperature ◽  
Test Reactor

scholarly journals Ion‐temperature‐gradient‐driven transport in a density modification experiment on the Tokamak Fusion Test Reactor

1992 ◽  
Vol 4 (4) ◽  
pp. 953-966 ◽  
Author(s):  
W. Horton ◽  
D. Lindberg ◽  
J. Y. Kim ◽  
J. Q. Dong ◽  
G. W. Hammett ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Ion Temperature ◽  
Ion Temperature Gradient ◽  
Test Reactor

Ultrafast spectroscopy diagnostic to measure localized ion temperature and toroidal velocity fluctuations

2010 ◽  
Vol 81 (10) ◽  
pp. 10D714 ◽  
Author(s):  
I. U. Uzun-Kaymak ◽  
R. J. Fonck ◽  
G. R. McKee ◽  
N. Schoenbeck ◽  
D. Smith ◽  
...  
Keyword(s):  
Ultrafast Spectroscopy ◽  
Ion Temperature ◽  
Velocity Fluctuations

scholarly journals Ion temperature from tangential charge exchange neutral analysis on the Tokamak Fusion Test Reactor

1987 ◽  
Author(s):  
C.L. Fiore ◽  
S.S. Medley ◽  
G.W. Hammett ◽  
R. Kaita ◽  
A.L. Roquemore ◽  
...  
Keyword(s):  
Charge Exchange ◽  
Ion Temperature ◽  
Test Reactor

scholarly journals Ion temperature from tangential charge exchange neutral analysis on the Tokamak Fusion Test Reactor

1988 ◽  
Vol 28 (8) ◽  
pp. 1315-1332 ◽  
Author(s):  
C.L. Fiore ◽  
S.S. Medley ◽  
G.W. Hammett ◽  
R. Kaita ◽  
A.L. Roquemore ◽  
...  
Keyword(s):  
Charge Exchange ◽  
Ion Temperature ◽  
Test Reactor
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