研究目的
Investigation of the electric field parameters in the channel of high-power laser radiation propagation in outdoor atmosphere for remote atomic substance analysis of aerosols and inert gases in the atmosphere and for application of ionized channels as controllable antennas, converters of HF and UHF electromagnetic radiation, and guiding streamers of lightning electricity.
研究成果
1. It has been established that during propagation of high-power radiation of the pulsed CO2 laser, a static electric field is created in air, with strength linearly depending on the beam energy density.
2. The feasibility of ionization channel diagnostics using the electro-optical effects in the atmosphere was shown, though with limitations.
3. The energy parameters of laser radiation influence the electrical characteristics of the atmosphere, both inside and outside the propagation channel, indicating potential applications in solving specific problems.
研究不足
The need for knowledge of the dependences Ef(W) and α indicates very severe limitations on the applicability of the electro-optical diagnostics even in the simplest case considered here.
1：Experimental Design and Method Selection:
The experimental setup included a pulsed CO2 laser, a NaCl lens for focusing the laser beam, a textolite cell, and sensors for measuring electric field strength and air ionic conductivity. The method involved measuring changes in electric field strength and conductivity in the laser beam propagation channel and near it.
2：Sample Selection and Data Sources:
The experiments were conducted in a controlled indoor environment with air as the medium. Data were collected using electric field sensors and ion sensors placed at specific distances from the laser beam axis.
3：List of Experimental Equipment and Materials:
Pulsed CO2 laser, NaCl lens, textolite cell, electric field sensor, ion sensor, digital voltmeter, storage oscilloscope, He–Ne laser for optical scheme tuning.
4：Experimental Procedures and Operational Workflow:
The laser beam was focused into the cell, and changes in electric field strength and conductivity were recorded with and without laser radiation focusing. The effects of laser radiation intensity and pump voltage on these parameters were investigated.
5：Data Analysis Methods:
The data were analyzed to establish dependencies of electric field strength and conductivity on laser radiation power and optical characteristics of the propagation channel. Empirical formulas were derived to describe these dependencies.
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