High source potential upstream of a current-free electric double layer

Journal Article · Fri Apr 15 00:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.1883182· OSTI ID:20736551

Charles, C ^[1]

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1. Plasma Research Laboratory, Research School of Physical Sciences and Engineering, Australian National University, Acton, Australian Capital Territory 0200 (Australia)

Large plasma potentials (up to {approx}80 V) are measured upstream of a current-free electric double layer generated in a helicon rf argon discharge for a constant rf power of 250 W (at 13.56 MHz) and for low operating pressures (<2 mTorr) using an electrostatic ion energy analyzer. The energy of the Ar{sup +} ion beam formed by acceleration through the potential drop of the double layer is found to be strongly correlated with the large source potentials: both the source potential and the beam energy increase with decreasing pressure. The creation of the double layer depends on the magnetic field generated by the solenoid near the closed end (glass plate) of the helicon source.

• OSTI ID: 20736551
• Journal Information: Physics of Plasmas, Vol. 12, Issue 4; Other Information: DOI: 10.1063/1.1883182; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
HIGH-FREQUENCY DISCHARGES
PLASMA DIAGNOSTICS
PLASMA POTENTIAL
PLASMA PRESSURE
PLASMA SHEATH