| title: | Laser Ablation and Aerosol Particles |
|---|---|
| reg no: | ETF5690 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.3. Physics |
| status: | accepted |
| institution: | TU Faculty of Physics and Chemistry |
| head of project: | Matti Laan |
| duration: | 01.01.2004 - 31.12.2006 |
| description: | The main purposes of the project are: the study of the laser ablation near its threshold at atmospheric pressure in air; the investigation of the parametres of nanometer-size aerosol particles generated by laser ablation as a function of the target material and trace gases added to the ambient air. There are only few studies dealing with laser ablation near its threshold in electronegative gases. At the same time near its threshold laser ablation creates particles of a narrow distribution function and the mean size size of particles is easily changeable from few up to hundred nanometers. In this range of particle sizes is missing the common understanding of mechanisms, which cause the formation and growth of particles. In the study electrical, optical and spectroscopic characteristics of the laser ablation are recorded for different target materials and radiation intensity; the humidity and concentrations of trace gases are changed; spectra of aerosol particles as a function of mentioned characteristics are recorded. We expext the clarification of the chain of processes, which leads from the metal vapor produced by ablation to the recorded particle spectrum. It is assumed that this chain has much common with the particle evolution created by another means. It is possible to apply the results of the study for calibration of aerosol spectrometers, for cleaning the environment from pollution and for laser-cleaning conservation works. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Matti Laan | TU Faculty of Physics and Chemistry | Assoc. Prof. | |
| 2. | Peeter Paris | TÜ, EFTI | Researcher | |
| 3. | Jüri Raud | TÜ, EFTI | doktorant | |