Title :
A fast circuit for polarizing Langmuir probes
Author :
Cave, Giuseppe Delle ; Fabricatore, Giulio
Author_Institution :
Istituto di Cibernetica del CNR, Arco Felice, Italy
fDate :
8/1/1991 12:00:00 AM
Abstract :
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
Keywords :
Langmuir probes; electrostatic devices; ramp generators; test equipment; 140 to 1400 Hz; 2 A; 32 V; 40 to 600 mus; bandwidth; duration; fast circuit; load current; multifilament plasma device; output current; output voltage; polarizing electrostatic Langmuir probes; repetition rate; sawtooth waveform; short-circuit protection; slew rate; thermal protection; Bandwidth; Circuit testing; Costs; Electrostatics; Plasma devices; Polarization; Probes; Protection; Thermal loading; Voltage;
Journal_Title :
Plasma Science, IEEE Transactions on
