Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Role of Helicon Waves on High-Density Plasma Production
View through CrossRef
Plasma production by rf fields in the helicon wave frequency range is investigated by using the rotating field antenna which can select the azimuthal mode number of the applied rf. The calculated dispersion relation shows that them= -1 mode helicon wave propagates whereas them=+1 mode helicon wave is cut off. The produced helium plasma density in the case of them= -1 mode rf application is 1 ×1013cm-3, which is more than 5 times greater than in the case of them= +1 mode rf application. The two-dimensional numerical simulation of the rf plasma production also qualitatively gives the same result as in the experiment. The plasma for them= +1 mode rf is sustained by the antenna near field, while for them= -1 mode rf, it is sustained by the power absorption from the propagating helicon wave. From both the experiment and the simulation, the helicon wave is revealed to increase the plasma density from the order of 1012cm-3to 1013cm-3by efficient power deposition to electrons.
Title: Role of Helicon Waves on High-Density Plasma Production
Description:
Plasma production by rf fields in the helicon wave frequency range is investigated by using the rotating field antenna which can select the azimuthal mode number of the applied rf.
The calculated dispersion relation shows that them= -1 mode helicon wave propagates whereas them=+1 mode helicon wave is cut off.
The produced helium plasma density in the case of them= -1 mode rf application is 1 ×1013cm-3, which is more than 5 times greater than in the case of them= +1 mode rf application.
The two-dimensional numerical simulation of the rf plasma production also qualitatively gives the same result as in the experiment.
The plasma for them= +1 mode rf is sustained by the antenna near field, while for them= -1 mode rf, it is sustained by the power absorption from the propagating helicon wave.
From both the experiment and the simulation, the helicon wave is revealed to increase the plasma density from the order of 1012cm-3to 1013cm-3by efficient power deposition to electrons.
Related Results
Study of the operating parameters of a helicon plasma discharge source using PIC-MCC simulation technique
Study of the operating parameters of a helicon plasma discharge source using PIC-MCC simulation technique
In this work, a Particle in Cell-Monte Carlo Collision simulation technique is used to study the operating parameters of a typical helicon plasma source. These parameters mainly in...
Magnetohydrodynamics enhanced radio blackout mitigation system for spacecraft during planetary entries
Magnetohydrodynamics enhanced radio blackout mitigation system for spacecraft during planetary entries
(English) Spacecraft entering planetary atmospheres are enveloped by a plasma layer with high levels of ionization, caused by the extreme temperatures in the shock layer. The charg...
Linking White‐Tailed Deer Density, Nutrition, and Vegetation in a Stochastic Environment
Linking White‐Tailed Deer Density, Nutrition, and Vegetation in a Stochastic Environment
ABSTRACT
Density‐dependent behavior underpins white‐tailed deer (
Odocoileus virginianus
) theory and...
Cometary Physics Laboratory: spectrophotometric experiments
Cometary Physics Laboratory: spectrophotometric experiments
<p><strong><span dir="ltr" role="presentation">1. Introduction</span></strong&...
Application of Thomson scattering to helicon plasma sources
Application of Thomson scattering to helicon plasma sources
The possibility of performing electron density and temperature measurements in a high power helicon plasma is a crucial issue in the framework of the AWAKE (Advanced WAKefield Expe...
Different operational regimes in a helicon plasma source
Different operational regimes in a helicon plasma source
The characterization of a helicon plasma source has been done in argon plasmas using a rf compensated Langmuir probe. It is now well known that helicon discharges exhibit three mod...
Rosetta electric field observations in the plasma environment of comet 67P/Churyumov-Gerasimenko
Rosetta electric field observations in the plasma environment of comet 67P/Churyumov-Gerasimenko
<div>The plasma environments of active comets are dominated by the interaction of the solar wind with newly born cometary heavy ions, predominantly water group ions p...
Statistical Distribution of Magnetosonic Waves in the Martian Space
Statistical Distribution of Magnetosonic Waves in the Martian Space
Martian space is rich in plasma waves generated by plasma instabilities in both the solar wind and the Martian environment. These waves interact with charged particles through wave...