| title: | Optical dynamic absorption(refraction) in discharge-pumped high-pressure rare gas media |
|---|---|
| reg no: | ETF6549 |
| project type: | Estonian Science Foundation research grant |
| status: | accepted |
| institution: | Institute of Physics at University of Tartu |
| head of project: | Aleksei Treštšalov |
| duration: | 01.01.2005 - 31.12.2008 |
| description: | In our project high-current pulsed discharge-excited plasma in high-pressure rare gas mixtures is the object of investigation. The main goals of the project are: 1. Development of theoretical, methodical and experimental background of nonintrusive absorption probing diagnostic technique for on-line spatial-time monitoring of several excited atomic and molecular species densities in high-pressure rare gas discharge plasma. Obtained quantitative experimental data will be used for justifying and selection of several existed simulation modelling codes. Spectroscopic information about Kr2 and Xe2 Rydberg states is one of special interest. 2. Studying of optical nonthermal aberrations of propagated probe laser wavefront caused by the dynamic (time-dependent) refraction inhomogeneities in the plasma of high-pressure rare gas mixtures. Revealing of the limiting role of this mechanism for using discharge plasma as a VUV excimer laser active medium at high pumping power density is one of the specific aims of this project. 3. For decreasing of plasma dynamic aberrations negative action, experiments with discharge in cooled rare gas mixtures are planned. There is a hope to reduce the discharge pumping power density, which is necessary to approach the lasing threshold for rare gas excimer VUV lasers. Engineering of metal-ceramic module for investigation of cryogenically cooled discharge in high-pressure rare gases is of special interest. We expect that these investigations will help to understand efficiency of the discharge pumping and how close to the lasing-threshold conditions we are able to approach in our real VUV laser discharge pumping devices. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Erko Jalviste | Institute of Physics at University of Tartu | scientist | |
| 2. | Aleksandr Lissovski | University of Tartu | Ph.D student | |
| 3. | Aleksei Treštšalov | Institute of Physics at University of Tartu | Head of the laboratory of laser techniques | |