Oscilloscope measurement signals of the light scattering of individual suspension droplets on a Gaussian beam. (Q6699534)

The light scattering of the droplets on a Gaussian beam are measured using a commercial device SpraySpy PL100 from AOM-Systems GmbH. It has one laser source with a wavelength of 405nm along with two detectors placed around and named here as A and B. This laser source as well as the two detectors are pointed towards the droplet chain, which is created by a commercial monodisperse droplet generator from FMP Technology GmbH. The detectors, in the form of photo multipliers, aim to track and capture light scattered from the droplets passed through the Gaussian beam. The light scattering signal is subsequently converted into a voltage signal by a transimpedance amplifier. The measuring signal isdigitized by a digital oscilloscope PicoScope 6404B. The signal consists of 32 measurement frames with an individual duration of 20ms sampled by 312.5MS/s. Each frame contains about 1000 individual light scattering signals. Since there are two independent detectors with one signal generated by each, there are also two active channels in the measurement on the oscilloscope named correspondingly Channel A and Channel B. In total, measurements are conducted for a concentration range of 0 to 100%. From 0 to 25% a measurement step amounts to 1\% (1%, 2%...,25%) while from 25 to 100\% a measurement step amounts to 2.5%, rounded up to 3% (25%, 28%, 30%...100%).