Plasma density injection and flow during coaxial helicity injection in a tokamak

2018 ◽  
Vol 25 (2) ◽  
pp. 022512
Author(s):  
E. B. Hooper
Keyword(s):  
Plasma Density ◽  
Helicity Injection ◽  
Coaxial Helicity Injection

RF current drive with magnetic helicity injection

1985 ◽  
Vol 33 (2) ◽  
pp. 257-264 ◽  
Author(s):  
D. K. Bhadra ◽  
C. Chu
Keyword(s):  
Steady State ◽  
Plasma Density ◽  
Electromagnetic Waves ◽  
Current Drive ◽  
Magnetic Helicity ◽  
Finite Frequency ◽  
Helicity Injection ◽  
Steady State Current ◽  
External Injection ◽  
Frequency Current

External injection of magnetic helicity into a plasma may be possible through the introduction of appropriately polarized electromagnetic waves. A concept of steady-state current-drive is presented, based on the validity of conservation of helicity (appropriately defined for finite frequency processes). It is shown that such external injection of helicity can maintain a steady-state current by compensating the volt-seconds consumed through plasma resistivity. Such a mechanism, if experimentally successful, is particularly interesting at high densities because the efficiency of the process does not depend on plasma density, as opposed to other radio-frequency current-drive techniques.

Temperature and density characteristics of the Helicity Injected Torus-II spherical tokamak indicating closed flux sustainment using coaxial helicity injection

2008 ◽  
Vol 15 (8) ◽  
pp. 082501 ◽  
Author(s):  
W. T. Hamp ◽  
T. R. Jarboe ◽  
B. A. Nelson ◽  
R. G. O’Neill ◽  
R. Raman ◽  
...  
Keyword(s):  
Spherical Tokamak ◽  
Helicity Injection ◽  
Coaxial Helicity Injection

Low Aspect Ratio Tokamak Formation and Sustainment by Coaxial Helicity Injection Current Drive

1995 ◽  
Vol 27 (3T) ◽  
pp. 333-336
Author(s):  
B. A. Nelson ◽  
T. R. Jarboe ◽  
D. J. Orvis ◽  
A. K. Martin ◽  
J. Xie ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Current Drive ◽  
Injection Current ◽  
Helicity Injection ◽  
Low Aspect Ratio ◽  
Coaxial Helicity Injection

Magnetic reconnection process in transient coaxial helicity injection

2013 ◽  
Vol 20 (9) ◽  
pp. 090702 ◽  
Author(s):  
F. Ebrahimi ◽  
E. B. Hooper ◽  
C. R. Sovinec ◽  
R. Raman
Keyword(s):  
Magnetic Reconnection ◽  
Helicity Injection ◽  
Reconnection Process ◽  
Coaxial Helicity Injection

scholarly journals NSTX Plasma Start-Up Using Transient Coaxial Helicity Injection

2007 ◽  
Vol 52 (3) ◽  
pp. 393-397 ◽  
Author(s):  
D. Mueller ◽  
R. Raman ◽  
M. G. Bell ◽  
T. R. Jarboe ◽  
B. LeBlanc ◽  
...  
Keyword(s):  
Helicity Injection ◽  
Start Up ◽  
Coaxial Helicity Injection

scholarly journals Simulation of multi-pulse coaxial helicity injection in the Sustained Spheromak Physics Experiment

2018 ◽  
Vol 25 (3) ◽  
pp. 032503 ◽  
Author(s):  
J. B. O'Bryan ◽  
C. A. Romero-Talamás ◽  
S. Woodruff
Keyword(s):  
Helicity Injection ◽  
Coaxial Helicity Injection ◽  
Physics Experiment

scholarly journals Application of Townsend avalanche theory to tokamak startup by coaxial helicity injection

2017 ◽  
Vol 58 (1) ◽  
pp. 016013 ◽  
Author(s):  
K.C. Hammond ◽  
R. Raman ◽  
F.A. Volpe
Keyword(s):  
Helicity Injection ◽  
Coaxial Helicity Injection
Sign in / Sign up

Export Citation Format

Share Document