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A modified split-anode detector for the study of the anode region of atmospheric pressure arc plasmas

L O Vilarinho1,2 and C Fanara1

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The split-anode technique developed in the 1960s for the study of the anode region of atmospheric pressure arcs has been modified in order to reduce (and subsequently eliminate) the need for double Abel inversion to reconstruct the local physical information. A first version of a detector based on a conductive sheet is presented and the performances of the new set-up are compared under varying arc conditions. Good stability against erratic arcing was obtained using relatively high arc travel speed (60 mm s−1). The signal shape shows a good degree of symmetry in forward and backward motion of the arc through the anode interface, although the disturbance of the latter cannot be avoided completely. The voltage readings obtained at several arc currents fall in between two sets of previously published data. Preliminary results on current density are also given.


PACS

52.70.Ds Electric and magnetic measurements

84.37.+q Electric variable measurements (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)

07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing

52.80.Mg Arcs; sparks; lightning; atmospheric electricity

Subjects

Electronics and devices

Instrumentation and measurement

Plasma physics

Dates

Issue 1 (January 2004)

Received 20 August 2003, accepted for publication 1 October 2003, in final form 24 September 2003

Published 20 October 2003



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