DocumentCode :
776453
Title :
Two dimensional imaging of the plasma response to externally launched fast waves in preheated spherical Tokamaks
Author :
Bruma, Cezar ; Cuperman, Sami ; Komoshvili, Konstantin
Author_Institution :
Sch. of Phys. & Astron., Tel Aviv Univ., Ariel, Israel
Volume :
33
Issue :
2
fYear :
2005
fDate :
4/1/2005 12:00:00 AM
Firstpage :
456
Lastpage :
457
Abstract :
We have considered the problem of the consistent determination of the global electromagnetic field for Alfve`nic modes in inhomogeneous, magnetized, resistive, finite aspect ratio plasmas in the presence of externally launched radio frequency (RF) waves. The "global" approach consists of the simultaneous treatment of the plasma-vacuum-external RF source-vacuum-metal wall configuration with the appropriate consideration of wave propagation, transmission, absorption, and mode conversion; in this, no simplifying approximations or small parameter expansions are used. Thus, the basic physics of arbitrary aspect ratio and noncircular cross section, axially symmetric tokamaks in the preheated stage and in the presence of externally (antenna) launched RF waves is adequately described; it rigorously holds, in particular, for the low aspect ratio (spherical) tokamaks mentioned above. As a study case, we considered the START-device (Sykes et al., 1983; Sykes 1994; Wilson, 1994).
Keywords :
Tokamak devices; plasma Alfven waves; plasma electromagnetic wave propagation; plasma instability; plasma toroidal confinement; Alfvenic modes; START-device; axially symmetric tokamaks; externally launched RF waves; externally launched fast waves; externally launched radiofrequency waves; finite aspect ratio plasma; global electromagnetic field; inhomogeneous plasma; magnetized plasma; mode conversion; noncircular cross section; plasma-vacuum-external RF source-vacuum-metal wall configuration; preheated spherical tokamaks; resistive plasma; two dimensional imaging; wave absorption; wave propagation; wave transmission; Antennas and propagation; Magnetic devices; Physics; Plasma simulation; Plasma sources; Plasma stability; Plasma waves; Radio frequency; Tokamaks; Toroidal magnetic fields; AlfvÉn waves; spherical tokamaks;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2005.845360
Filename :
1420524
Link To Document :
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