Is the bulk mode conversion important in high density helicon plasma?
نویسندگان
چکیده
منابع مشابه
High-beta plasma effects in a low-pressure helicon plasma
In this work, high-beta plasma effects are investigated in a low-pressure helicon plasma source attached to a large volume diffusion chamber. When operating above an input power of 900 W and a magnetic field of 30 G a narrow column of bright blue light due to Ar II radiation is observed along the axis of the diffusion chamber. With this blue mode, the plasma density is axially very uniform in t...
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A high density ‘blue’ mode has been observed when operating the Helicon Double Layer Thruster (HDLT) with xenon. Using a Langmuir probe and a retarding field energy analyser (RFEA), the plasma source and exhaust have been characterized at various radio frequency (RF) powers and operating pressures. When operating at low RF powers, the HDLT prototype is shown to be in a capacitively coupled mode...
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Helicon discharges characteristically exhibit a sharp jump from low to high density as the radiofrequency (RF) power is raised. This is usually explained by the transition from an inductively coupled plasma (ICP) mode to a helicon mode when the dispersion relation for helicon wave propagation is satisfied at a critical power or magnetic field. Experiments have suggested a different mechanism fo...
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High density (ne ≥ 4× 1018m−3) helium plasma is produced in a linear device for the development of a neutral helium-beam attenuating target. Radially peaked density profile accompanied by one order of density jump is observed for radio frequency input power higher than the threshold power. The threshold power varies with the external magnetic field. The results suggest that the density jump is ...
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Electromagnetic waves with different modes, such as Z-, whistler-, LO- and RX- modes are found in different regions of the Earth magnetosphere and the magnetosphere of other planets. Since whistler-mode waves influence the behavior of the magnetosphere, and they are used as experimental tools to investigate the upper atmosphere, they are important. On the other hand, the mode conversion process...
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ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2016
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.4951017