| title: | Spectroscopic diagnostics of high-current discharges for pumping of VUV rare gas lasers. |
|---|---|
| reg no: | ETF5044 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.3. Physics 2.9. System Engineering and Computer Technology |
| status: | completed |
| institution: | Institute of Physics at University of Tartu |
| head of project: | Aleksei Treštšalov |
| duration: | 01.01.2002 - 31.12.2004 |
| description: | Volume and sliding discharge-excited plasma in high-pressure rare gas mixtures is the object of investigation in this project. The main goals are: 1. Development of nonintrusive spectroscopic diagnostic techniques for on-line spatial-time monitoring of high-pressure rare gas discharge plasma parameters (electron density and temperature, gas temperature). Stark broadening of spontaneous emission atomic lines, intrinsic "N2 molecular thermometer" will be used for the diagnostics. 2. Getting of spectroscopic data for molecular electronic states for rare gas excimer molecules (homo-and heteronuclear). Excimers creation and quenching (rate constants and pathways) in high-pressure gas mixtures are of special interest in our project. 3.Development of new metal-ceramic circuits for fast-excitation of high-pressure rare gas mixtures in: 1) volume discharge and 2) sliding discharge on the surface of cooled sapphire plate. The investigation of electrical and optical performance characteristics. Processes of hot cathode spots ignition and sputtering of special electrodes' material will be studied from spontaneous emission of metal atoms excited in cathode (anode) hot spots. Optimization of metal-ceramic discharge module with the final aim of getting lasing for rare gas VUV excimers is planning. We expect that these investigations will allow us to clarify essential information on plasmo-chemical processes and spectroscopic data for excimer rare gas molecules (homo-and heteronuclear) as well as to solve a number of applied problems of high-pressure gas discharges. The proposed research may provide a valuable contribution to engineering of compact, ecologically pure, "sealed-off" VUV rare gas discharge-pumped excimer lasers. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Erko Jalviste | IP UT | scientist | |
| 2. | Aleksei Treštšalov | Institute of Phusics, University of Tartu | Head of laboratory | |
| 3. | Andrei Tsižik | University of Tartu | Ph.D. student | |