Title :
m=±1 and m=±2 mode helicon wave excitation
Author :
Kim, Jung-Hyung ; Yun, Seok-Min ; Chang, Hong-Young
Author_Institution :
Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
fDate :
12/1/1996 12:00:00 AM
Abstract :
The characteristics of plasma produced by plane polarized m=±1 and m=±2 mode helicon waves were investigated for the first time. Plane polarized m=±1 and m=±2 mode helicon waves were mainly excited using a Nagoya type III antenna and a quadrupole antenna, respectively. Two-dimensional cross-field measurements of ArII optical emission induced by hot electrons were made to investigate the RF power deposition. The components of the wave magnetic field measured with a magnetic probe were compared with the field profiles computed for the m=±1 and m=±2 modes. Two and four high intensity plasma columns were observed for the m=±1 and m=±2modes, respectively. These columns were located at the regions between the antenna legs. The radial profiles of the wave magnetic field were in good agreement with computations
Keywords :
antennas in plasma; helicons; plasma electromagnetic wave propagation; plasma probes; plasma production; plasma waves; whistlers; Nagoya type III antenna; RF power deposition; antenna legs; field profiles; helicon wave excitation; hot electrons; m=±1 mode helicon waves; m=±2 mode helicon waves; magnetic probe; optical emission; plane polarized mode helicon waves; plasma columns; quadrupole antenna; radial profiles; two-dimensional cross-field measurements; wave magnetic field; Antenna measurements; Electron emission; Electron optics; Magnetic field measurement; Optical polarization; Plasma measurements; Plasma properties; Plasma waves; Power measurement; Stimulated emission;
Journal_Title :
Plasma Science, IEEE Transactions on
