Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Physics of Plasmas
5 (1998), S. 572-579
ISSN:
1089-7674
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The propagation of helicon waves and the plasma density has been measured in a cylindrical, magnetized plasma for a range of magnetic fields and input power levels. A transition in the coupling mechanism from electrostatic (E mode) to inductive (H mode) coupling is evidenced by a sharp change in the plasma density coinciding with a change in the wave fields from a linearly polarized standing wave, with highest amplitude close to the antenna to a right-hand elliptically polarized traveling wave with a phase velocity of about 6×106 m/s extending into the downstream region. An explanation of the transition to the H mode is put forward in terms of the conductivity across the magnetic field and an associated skin depth for power deposition. The polarization of the wave fields in the H mode is interpreted in terms of the interference between m=+1 and −1 modes (where m is the azimuthal mode number). © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.872749
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