A computerized experimental set-up for second derivative Langmuir probe measurements
Tsv K Popov, H Kovachev, Mashenka B. Dimitrova, M Mitov · Journal of Physics Conference Series · 2006
A computerized experimental set-up for second derivative Langmuir probe measurements is presented. As a signal generator for the differentiating signal a computer stereo sound card is used. The probe signal is detected using a selective amplifier - the lock-in amplifier combination, whose output is measured by an ADC card inside a computer. Special drivers working under Microsoft Windows98 Second Edition were created in Visual C++ 6.0 to control the operation of the probe system.