2014
DOI: 10.7566/jpscp.1.015022
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Abstract: To investigate characteristics of helicon plasma with a very small diameter, we have developed the Small Helicon Device (SHD) and measured the electron density under various conditions over a wide range of radio frequencies. Using a tube with inner diameter of 20 mm, an electron density n e of ~ 10 13 cm-3 near the antenna region was obtained with an excitation frequency f of 7 MHz, rf power P rf of ~ 1000 W, and axial magnetic field in the magnet coil region B of 560 G. In the case of an inner diameter of 5 (…

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