| Autor: |
L Ya Margolin, V V Korobkin, L Ya Polonskiĭ, L N Pyatnitskiĭ |
| Rok vydání: |
1989 |
| Předmět: |
|
| Zdroj: |
Soviet Journal of Quantum Electronics. 19:1214-1220 |
| ISSN: |
0049-1748 |
| DOI: |
10.1070/qe1989v019n09abeh009123 |
| Popis: |
The structure of a laser spark and its dynamics during the early stage of formation of a continuous channel were investigated by recording the spatial, temporal, and spectral characteristics of the scattered heating radiation. A plasma formed in the spark channel had a quasiperiodic (in the longitudinal direction) structure with characteristic dimensions 0.1–0.15 mm. An analysis was made of various possible factors which could be responsible for such a structure. A model of the Fresnel reflection of light from a plasma boundary was used to estimate the electron density immediately after optical breakdown: This density was (0.7–1.4) × 1020 cm−3 in air, (4–9) × 1019 cm−3 in argon and neon, and (5–8) × 1018 cm−3 in helium. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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