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m=±1 and m=±2 mode helicon wave excitation

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3 Author(s)
Kim, Jung-Hyung ; Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea ; Yun, Seok-Min ; Hong-Young Chang

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

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Plasma Science, IEEE Transactions on  (Volume:24 ,  Issue: 6 )