Discharge modes and wave structures using loop antennae in a helicon plasma source
- 23 December 1999
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 42 (1), 41-56
- https://doi.org/10.1088/0741-3335/42/1/305
Abstract
Discharge modes separated by density jumps in a helicon plasma source were controlled successfully by changing the antenna wavenumber spectrum with a two-loop antenna, in addition to varying the filling pressure P and the magnetic field B . For the case of wave excitation with the anti-parallel antenna current direction, the threshold power P th for a density jump, regardless of B and P , was larger than in the case of a parallel direction, and P th became larger with the increase in B in both cases. From the excited wave structures, it was found that the helicon wave plasma was observed after the jump with the high field, while with the low field regardless of the density region or with the high field before the jump, an inductively coupled plasma was found. No indication of a major role of the lower hybrid wave and Trivelpiece-Gould wave on the plasma production was observed.Keywords
This publication has 37 references indexed in Scilit:
- Propagating Wave Characteristics for Plasma Production in Plasma Processing FieldJapanese Journal of Applied Physics, 1997
- Physics of helicon dischargesPhysics of Plasmas, 1996
- Resonance wave discharge and collisional energy absorption in helicon plasma sourcePlasma Physics and Controlled Fusion, 1994
- Role of Helicon Waves on High-Density Plasma ProductionJapanese Journal of Applied Physics, 1994
- Helicon waves in a non-uniform plasmaPlasma Sources Science and Technology, 1994
- Plasma production by helicon wavesPlasma Sources Science and Technology, 1993
- Plasma production in a toroidal heliac by helicon wavesPhysical Review Letters, 1991
- Helicon waves and efficient plasma productionPhysics of Fluids B: Plasma Physics, 1991
- Plasma ionization by helicon wavesPlasma Physics and Controlled Fusion, 1991
- Very efficient plasma generation by whistler waves near the lower hybrid frequencyPlasma Physics and Controlled Fusion, 1984