| Popis: |
An ultradense (> 10/sup 19/e/sup -//cm/sup 3/), low-temperature (approx. 20 eV), Z-pinch plasma has been used for CO/sub 2/-laser-plasma interaction experiments at 10.6..mu..m. Anomalous transmission or radially incident, intense (approx. 10/sup 11/ W/cm/sup 2/) laser radiation of 38 nsec full width at half-maximum has been observed to occur through the initially overdense plasma. ..nu../sub osc//..nu../sub th/ is calculated to be approx. = 0.9 at the critical surface, where holographic interferometry shows critical density scale lengths of 70 to 200 ..mu..m. The transmitted beam shows increased temporal modulation and a periodic spatial structure resembling Fresnel rings. |
