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Title: Wall charging of a helicon antenna wrapped plasma filled dielectric tube

Dielectric wall charging of a cylindrical glass wall surrounded by a helicon antenna of 18 cm length is measured in a linear helicon plasma device with a diverging magnetic field. The ions because of their lesser mobility do not respond to the high frequency electric field and the electrons charge the wall to a negative DC potential also known as the DC self-bias. The wall potential in this device is characterized for different neutral pressure, magnetic field, and radio frequency (RF) power. Axial variation of wall potential shows higher self-bias potentials near the antenna rings. Ion magnetization in the source chamber increases both wall charging and plasma potential of the source due to confinement.
Authors:
; ; ; ;  [1]
  1. Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)
Publication Date:
OSTI Identifier:
22408034
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANTENNAS; CONFINEMENT; CYLINDRICAL CONFIGURATION; DIELECTRIC MATERIALS; ELECTRIC FIELDS; ELECTRONS; GLASS; ION MOBILITY; MAGNETIC FIELDS; MAGNETIZATION; PLASMA; PLASMA POTENTIAL; POTENTIALS; RADIOWAVE RADIATION; TUBES; WALLS