A new diagnostic of the plasma density profile near the edge transport barrier from measurements of the radial profile of the Hα line intensity

2008 ◽  
Vol 79 (8) ◽  
pp. 083502 ◽  
Author(s):  
G. S. Voronov
Keyword(s):  
Plasma Density ◽  
Density Profile ◽  
Line Intensity ◽  
Radial Profile ◽  
Transport Barrier ◽  
Plasma Density Profile

scholarly journals Chirality-dependent Plasma Density Profile Changes from Helicon Wave Ponderomotive Forces

1995 ◽  
Vol 48 (4) ◽  
pp. 691 ◽  
Author(s):  
V Petržílka ◽  
RL Dewar
Keyword(s):  
Plasma Density ◽  
Density Profile ◽  
Radial Profile ◽  
Force Density ◽  
Directed Transport ◽  
Helicon Wave ◽  
Plasma Density Profile ◽  
Ponderomotive Forces ◽  
Helicon Waves ◽  
Wave Induced

It is shown that nonresonant helicon-wave-induced transport may result in significant changes in the plasma density radial profile; this is illustrated using parameters appropriate to the cylindrical experiment BASIL and the toroidal experiment SHEILA. Whereas m = +1 helicon waves induce an inward-directed transport and change the density profile to a more centrally peaked one with a higher density on the axis, m = −1 helicon waves induce an outward-directed transport velocity and change the density profile to a hollow one. This may be the clue to the puzzle as to why m = −1 helicon waves are frequently difficult or impossible to excite, as the plasma column is effectively blown off to the discharge chamber walls by the ponderomotive force density of the waves with this chirality (sense of rotation of the wavevector with respect to the axial or toroidal magnetic field).

Z pinch imploding plasma density profile measurements using a two-frame laser shearing interferometer

2002 ◽  
Vol 30 (1) ◽  
pp. 227-238 ◽  
Author(s):  
Niansheng Qi ◽  
J. Schein ◽  
J. Thompson ◽  
P. Coleman ◽  
M. McFarland ◽  
...  
Keyword(s):  
Plasma Density ◽  
Density Profile ◽  
Plasma Density Profile ◽  
Z Pinch

Variation of Radial Plasma Density Profile with the Excitation Frequency in a Magnetron-Type Plasma

1998 ◽  
Vol 37 (Part 1, No. 4A) ◽  
pp. 2035-2038
Author(s):  
Sunil Wickramanayaka ◽  
Yunlong Li ◽  
Satoru Iizuka ◽  
Ken-ichi Takagi ◽  
Yukito Nakagawa ◽  
...  
Keyword(s):  
Plasma Density ◽  
Density Profile ◽  
Excitation Frequency ◽  
Plasma Density Profile

scholarly journals Real-time feedback control of the plasma density profile on ASDEX Upgrade

2011 ◽  
Vol 51 (4) ◽  
pp. 043002 ◽  
Author(s):  
A. Mlynek ◽  
M. Reich ◽  
L. Giannone ◽  
W. Treutterer ◽  
K. Behler ◽  
...  
Keyword(s):  
Feedback Control ◽  
Real Time ◽  
Plasma Density ◽  
Density Profile ◽  
Plasma Density Profile

Investigation of perturbations of laser plasma density profile by high-speed interferometry

1976 ◽  
Vol 6 (5) ◽  
pp. 571-577 ◽  
Author(s):  
Yu A Zakharenkov ◽  
Oleg N Krokhin ◽  
G V Sklizkov ◽  
A S Shikanov
Keyword(s):  
Plasma Density ◽  
Density Profile ◽  
Laser Plasma ◽  
High Speed ◽  
Plasma Density Profile

A heuristic penumbral imaging technique for measurements of laser-produced plasma density profile

2002 ◽  
Vol 73 (9) ◽  
pp. 3198-3204 ◽  
Author(s):  
Shinya Nozaki ◽  
Yen-wei Chen ◽  
Zensho Nakao ◽  
Shinsuke Fujioka ◽  
Hiroyuki Shiraga
Keyword(s):  
Plasma Density ◽  
Density Profile ◽  
Imaging Technique ◽  
Penumbral Imaging ◽  
Plasma Density Profile ◽  
Laser Produced Plasma
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