Therefore, understanding detector response to high-energy particles is utmost important during normal solar conditions and also during SEP events. In addition, the detector receives high-energy solar wind particles and Galactic Cosmic Rays in space, along with the dust. In this regard, prediction of plasma capture efficiency is presented here using SIMION software, to get first hand estimate of detector performance. For the dust detector, bias optimization is worthwhile to reduce resources required on board a satellite. A dust impact on detector target produces charge carriers, which are captured by voltage biased electrodes for further processing. To detect such dust particles, an impact ionization dust detector is proposed for planetary application and it is under development at Physical Research Laboratory. Expected particle number density around Earth is presented based on the suggested model. Using past observations around Earth and an existing flux model, a power law model is suggested for incoming particle flux at Earth. Flux of dust particles at a given planet is important to understand total inflow of material and also, metal ion layers formed in atmosphere due to ablation. Various planets like Mars, Earth or Venus may capture such particles during their inward travel. These particles are originated from sources like Asteroid belt, Kuiper belt or comets and they evolve through their orbital paths. Interplanetary dust particles exist everywhere in the space between any two planets.
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