Investigations for Development of Structures for Control of Fog Contaminations

¹ Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
² Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
³ Escuela Politécnica Superior, Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
⁴ Institute of Mechanics, Bulgarian Academy of Sciences, Block 4, Acad. G. Bonchev St., Sofia -1113, Bulgaria

^* pv_todorov@abv.bg

Abstract

Characterization of fogs is an important problem that does not have a good solution in real conditions. To investigate this problem, we chose the electromagnetic echo effect (EMEE) because it offers several advantages measurements are fast, accurate and can be contactless. Various concepts for the detection of impurities in the composition of fogs by implementing the EMEE were considered. An overview was made of the advantages and disadvantages of the proposed methods. An experimental setup was designed to conduct studies regarding the development of sensors for the control of fog contaminations. It has been experimentally proven that a change in the generated EMEE signal is observed when a change in the composition of the fog is present. The signal is also influenced by various conditions, e.g. solid interaction efficiency and laser beam intensity, modulation frequency, etc. Those parameters were optimized properly to achieve high sensitivity and accuracy. Research results indicate the possibility to use them for the detection of CBRN agents.