Spatially Resolved Energy Analyzer Measurements of an Ion Beam on the Low Potential Side of a Current-free Double-layer
Spatially resolved measurements of a supersonic Ar+ ion beam are obtained using a movable retarding field energy analyzer positioned on the low potential side of a current-free helicon double-layer (DL). The DL is generated near the open end of the helicon source where the fairly "collisionless" argon plasma is expanding in a diverging magnetic field for a radio frequency power of 250 W and a pressure of about 0.35 mtorr. The potential drop of the DL induces ion acceleration and the formation...[Show more]
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