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A fast circuit for polarizing Langmuir probes

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2 Author(s)
Delle Cave, G. ; Istituto di Cibernetica del CNR, Arco Felice, Italy ; Fabricatore, G.

A circuit that has been designed and tested for polarizing electrostatic Langmuir probes in a multifilament plasma device (MPD) is described. The circuit provides a sawtooth waveform whose duration ranges between 40 and 600 μs, and repetition rate ranges between 140 and 1400 Hz. Output voltage swings up to +32 V with a load current of 2 A. The main advantages of the proposed circuit, compared with similar ones, are: better slew rate, larger bandwidth, higher output current, thermal and short-circuit protection, low cost, and ease of construction

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Plasma Science, IEEE Transactions on  (Volume:19 ,  Issue: 4 )